compute area Server radius area Client Figure 33.3 The client sends the radius to the server; the server computes the area and sends it to the client. To assign a value to a variable, you must place the variable name to the left of the assignment operator. Check Point 5.3.1 What is wrong if guess is initialized to 0 in line 11 in Listing 5.3? The Java API for developing Java database applications is called JDBC. In Java, each block begins with an opening brace ({) and ends with a closing brace (}). Therefore, && is referred to as the short-circuit or lazy AND operator, and || is referred to as the short-circuit or lazy OR operator. A shallow copy (oversimplified) is like creating a second reference to an object. Memory is volatile, because information is lost when the power is turned off. In general, framework-dependent is good for development and enterprise environments, while self-contained is often a better choice for ISVs. You can use the following selection statementto replace lines 1217 in Listing 2.2: if (radius < 0) { System.out.println("Incorrect input"); } else { double area = radius * radius * 3.14159; System.out.println("Area is " + area); } Selection statements use conditions that are Boolean expressions. super T> comparator). Can it be rounded uptotwo decimal places? Our suggestion is to also learn more about what Spark DataFrame is, the features, and how to use Spark DataFrame when collecting data. If you are looking at using System.Text.Json as an alternative to Newtonsoft.Json, you should check out the migration guide. The Companion Website contains the following supplements on how to install and use three popular databases: MySQL, Oracle, and Java DB: MySQL Tutorial Supplement IV.B: Tutorial for MySQL Oracle Tutorial Supplement IV.C: Tutorial for Oracle Java DB Tutorial Supplement IV.D: Tutorial for Java DB M34_LIAN0182_11_SE_C34.indd 6 5/23/17 5:54 PM 34.3 SQL 34-7 34.3.1 Creating a User Account on MySQL Assume you have installed MySQL 5 with the default configuration. A single space should be added on both sides of a binary operator, as shown in (a), rather in (b). Is there any better deep clone methods for list? The relationships of these classes are shown in Figure 32.9. Developing a software product is an engineering process. If your program has compile errors, you have to modify the program to fix them, then recompile it. Every time a ball hits a nail, it has a 50% chance of falling to the left or to the right. Here is a sample run: Enter the number of points: 8 Enter 8 points: 0 0 1 1 1 1 2 2 2 2 3 3 4 4 5 5 The closest two points are (0.0, 0.0) and (1.0, 1.0) The closest two points are (0.0, 0.0) and (1.0, 1.0) The closest two points are (1.0, 1.0) and (2.0, 2.0) The closest two points are (1.0, 1.0) and (2.0, 2.0) The closest two points are (2.0, 2.0) and (3.0, 3.0) The closest two points are (3.0, 3.0) and (4.0, 4.0) Their distance is 1.4142135623730951 ***8.9 (Game: play a tic-tac-toe game) In a game of tic-tac-toe, two players take turns marking an available cell in a 3 * 3 grid with their respective tokens (either X orO). Returns the result of computations when it is done. Their lengths can be obtained using x[0].length, x[1].length,. All rights reserved. Sometimes it is desirable to give more descriptive names in the result heading. O(N), .. Implement one server that serves all the clients, as shown in Figure 33.22. Therefore, you dont have to know how formulas are derived, but given the monthly interest rate, the number of years, and the loan amount, you can compute the monthly payment in this program. A class is a template, b lueprint, or contract that defines what an objects data fields and methods will be. A condition is bound to a lock. Stream-based c ommunications are used in most areas of Java programming and are the focus of this chapter. This statement is executed after each iteration and increments the control variable. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Full Stack Development with React & Node JS (Live), Fundamentals of Java Collection Framework, Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Serialization and Deserialization in Java with Example. Note the first number in the input for each list indicates the number of the elements in the list. For students, the system automatically detects errors in the logic and syntax of their code submissions and offers targeted hints that enable students to figure out what went wrongand why. Today, more than 3 billion devices run Java. .3.1 9 9.3.2 9.3.3 9.3.4 Describe the relationship between an object and its defining class. To execute the script, first switch to the javabook database using the following command: use javabook; then type run script file source script.sql; as shown in Figure 34.9. Thanks to everyone on the team that made that happen! The tool can be used by anyone that wants to use WinRT (on Windows) as an interop system, to expose native APIs to .NET or .NET APIs to native code. 3 37.4.2 Suppose you started the Web server, ran the following servlet twice by issuing an appropriate URL from the Web browser, and finally stopped Tomcat. For example, for grid[8][5], i=8 and j=5, 33(i/3)=6 and 33(j/3)=3. *31.21 (Use tab panes) Write a program using tab panes for performing integer and rational number arithmetic as shown in Figure 31.58. In the Inspector for the Add button, choose addButtonAction from a list of action processing methods, as shown in Figure 31.47. Note: If we want to make each element in the parallel stream to be ordered, we can use the forEachOrdered() method, instead of the forEach() method. Java is a full-fledged and powerful language that can be used in many ways. When a computer needs to communicate with another computer, it needs to know the other computers address. M32_LIAN0182_11_SE_C32.indd 31 5/22/17 12:34 PM 32-32 Chapter 32 Multithreading and Parallel Programming Invoking synchronizedCollection(Collection c) returns a new C ollection object, in which all the methods that access and update the original collection c are synchronized. Application programs may be stand-alone GUI applications or Web applications and may access several different database systems in the network, as shown in Figure 34.2. Whenever new funds are deposited into the account, the deposit task notifies the withdraw thread to resume. 3. true true true Table 3.7 Truth Table for Operator ^ p1 p2 p1 ^ p2 Example (assume age = 24, weight = 140) false false false (age > 34) ^ (weight > 140) is false, because (age > 34) and (weight > 140) are both false. This is known as a prompt, because it directs the user to enter an input. Sections 31.4 *31.7 (Translation) Write a program that displays a rectangle with upper-left corner point at (40, 40), width 50, and height 40. Here is a sample run: a = Enter v0, v1, and t: 5.5 50.9 4.5 The average acceleration is 10.0889 2.10 (Science: calculating energy) Write a program that calculates the energy needed to heat water from an initial temperature to a final temperature. It is used to move a graphical pointer (usually in the shape of an arrow) called a cursor around the screen, or to click on-screen objects (such as a button) to trigger them to perform an action. For example, the mnemonic add typically means to add numbers, and sub means to subtract numbers. C# 9 includes support for new patterns. In this example the list.stream() works in sequence on a single thread with the print() operation and in the output of the preceding program, the content of the list is printed in an ordered sequence as this is a sequential stream. The JDBC API is a set of Java interfaces and classes used to write Java programs for accessing and manipulating relational databases. Line 14 obtains an answer from the user. 32.3 Creating Tasks and Threads Key Point Runnable interface run() method M32_LIAN0182_11_SE_C32.indd 2 A task class must implement the Runnable interface. .NET 5.0 is also a great choice for your existing apps. If you already know SQL, you can skip Sections 34.2 and 34.3. In SQL the not equal to operator is or !=, but in Java it is !=. The tool can take advantage of other .NET features (AOT, C# features, IL linking), which was not an option for the previous system. The Statement interface is used to execute static SQL statements that dont contain any parameters. You have already used the pow(a,b) method to compute ab in Section 2.9.4, Exponent Operations and the random() method for generating a random number in Section 3.7. @rseanhall proposed and implemented a novel new model for doing that, which takes advantage of all the built-in application functionality offered by the .NET application hosting layer (specifically loading dependencies), while enabling a custom entrypoint to be called from native code. (X)")); } else if (myToken == 'O') { Platform.runLater(() -> lblStatus.setText("Player 1 (X) has won! *; javafx.application.Application; javafx.geometry.Insets; javafx.geometry.Pos; javafx.scene.Scene; javafx.scene.control.Label; javafx.scene.control.ScrollPane; javafx.scene.control.TextArea; javafx.scene.control.TextField; javafx.scene.layout.BorderPane; javafx.stage.Stage; public class Client extends Application { // IO streams DataOutputStream toServer = null; DataInputStream fromServer = null; @Override // Override the start method in the Application class public void start(Stage primaryStage) { // Panel p to hold the label and text field BorderPane paneForTextField = new BorderPane(); paneForTextField.setPadding(new Insets(5, 5, 5, 5)); paneForTextField.setStyle("-fx-border-color: green"); paneForTextField.setLeft(new Label("Enter a radius: ")); create UI TextField tf = new TextField(); tf.setAlignment(Pos.BOTTOM_RIGHT); paneForTextField.setCenter(tf); BorderPane mainPane = new BorderPane(); // Text area to display contents TextArea ta = new TextArea(); mainPane.setCenter(new ScrollPane(ta)); mainPane.setTop(paneForTextField); // Create a scene and place it in the stage Scene scene = new Scene(mainPane, 450, 200); primaryStage.setTitle("Client"); // Set the stage title primaryStage.setScene(scene); // Place the scene in the stage primaryStage.show(); // Display the stage tf.setOnAction(e -> { try { // Get the radius from the text field double radius = Double.parseDouble(tf.getText().trim()); M33_LIAN0182_11_SE_C33.indd 7 // Send the radius to the server toServer.writeDouble(radius); toServer.flush(); // Get area from the server double area = fromServer.readDouble(); handle action event read radius write radius read area // Display to the text area ta.appendText("Radius is " + radius + "\n"); ta.appendText("Area received from the server is " + area + '\n'); 5/22/17 2:25 PM 33-8 Chapter 33Networking request connection input from server output to server 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 } catch (IOException ex) { System.err.println(ex); } }); try { // Create a socket to connect to the server Socket socket = new Socket("localhost", 8000); // Socket socket = new Socket("130.254.204.36", 8000); // Socket socket = new Socket("drake.Armstrong.edu", 8000); // Create an input stream to receive data from the server fromServer = new DataInputStream(socket.getInputStream()); // Create an output stream to send data to the server toServer = new DataOutputStream(socket.getOutputStream()); } catch (IOException ex) { ta.appendText(ex.toString() + '\n'); } } } You start the server program first then start the client program. It is important to ensure that the result of the parallel stream is the same as is obtained through the sequential stream, so the parallel streams must be stateless, non-interfering, and associative. Line 10 obtains the minutes using seconds / 60. line# 4 7 10 13 16 19 22 variables totalMilliseconds totalSeconds currentSecond totalMinutes currentMinute totalHours currentHour M02_LIAN9966_12_SE_C02.indd 55 1203183068328 1203183068 8 20053051 31 334217 17 28/09/19 3:45 PM 56 Chapter 2 Elementary Programming nanoTime Check Point In the sample run, a single digit 8 is displayed for the second. How do you make it synchronized? (row == i && col == j) && grid[row][col] == grid[i][j]) return false; return true; // The current value at grid[i][j] is valid } } Enter 9 6 3 1 7 8 2 5 4 8 2 1 4 9 6 7 3 5 5 8 9 3 1 7 6 4 2 Valid isValid method overloaded isValid method M08_LIAN9966_12_SE_C08.indd 302 a Sudoku puzzle solution: 1 7 4 2 5 8 3 2 5 6 4 9 6 8 9 7 3 1 4 3 7 5 9 6 8 5 2 3 1 7 9 6 1 8 2 4 7 1 3 4 6 2 2 4 6 9 8 5 5 9 8 1 7 3 solution The program invokes the readASolution() method (line 6) to read a Sudoku solution and return a two-dimensional array representing a Sudoku grid. These comments must precede the class or the method header in order to be extracted into a javadoc HTML file. Java Enterprise: Maven/ Spring/ Security/ JPA(Hibernate)/ REST(Jackson)/ Bootstrap(CSS)/ jQuery. A thread enters the monitor by acquiring a lock on it and exits by releasing the lock. This is known as declaring variables. https://www.oracle.com/java/technologies/javase-downloads.html, How to Install Elasticsearch, Logstash, and Kibana (ELK Stack) on CentOS 8. This guide will show you how to install Apache Spark on Windows 10 and test the installation. For example, of a taxable income of $400,000 for single filers, $8,350 is taxed at 10%, (33,950 - 8,350) at 15%, (82,250 - 33,950) at 25%, (171,550 - 82,250) at 28%, (372,950 - 171,550) at 33%, and (400,000 - 372,950) at 35%. c. The statement x = x + 5 is also an expression. *; import java.util.concurrent.locks. The updateString method (lines 165177) is responsible for displaying the locale-sensitive strings. Section 32.18 *32.12 (Parallel array initializer) Implement the following method using the Fork/Join Framework to assign random values to the list. For example, since the System class is defined in Java, you should not name your class System. Suppose you want to assign the larger number of variable num1 and num2 to max. 37.8.3 Session Tracking Using the Servlet API You have now learned both session tracking using hidden values and session tracking using cookies. Check Point 5.6.1 Suppose the input is 2 3 4 5 0. If you set this value to 0, the cookie is deleted. The classpath directory and jar files are separated by commas. The server spawns a new thread and invokes service. 5/22/17 12:34 PM 32.16 Parallel Programming 32-33 Fork Subproblem Join Subproblem Problem Solution Subproblem Subproblem Figure 32.27 The nonoverlapping subproblems are solved in parallel. Sets a new volume level for this TV. If they match, your download file is uncorrupted. To use UML graphical notation to describe classes and objects (9.2). In the next example, you will write a new servlet that uses the POST method to obtain the current time. Console input means to receive input from the keyboard, and console output means to display output on the monitor.) If the second condition is true, the grade is B. Note the import statement can be omitted if you replace Scanner by java.util.Scanner in line 6. To obtain substrings (4.4.8). a hundred times: int i; for (i = 0; i < 100; i++) { System.out.println("Welcome to Java! The tlb tools relied on a lot of COM interop plumbing in the .NET runtime. A kilobyte is about 1,000 bytes, a megabyte about 1 million bytes, a gigabyte about 1 billion bytes, and a terabyte about 1,000 gigabytes. The variable amount is a double decimal representing dollars and cents. ***37.14 (Opinion poll) Create an HTML form that prompts the user to answer a question such as Are you a CS major?, as shown in Figure 37.35a. The servlet retrieves all the cookies into an array using the getCookies method (line 100): Cookie[] cookies = request.getCookies(); To obtain the name of the cookie, use the getName method (line 104): String name = cookies[i].getName(); The cookies value can be obtained using the getValue method: String value = cookies[i].getValue(); Cookies are stored as strings just like form parameters and hidden values. . Exit. 7. (b) Write a Boolean expression that evaluates to true if a number stored in variable num is between 1 and 100 or the number is negative. The cost is: writing more code; the maintenance risk of adding a field without adding it to the clone method; need to write helper classes for any 3rd party classes (such as Dictionary<>), It's too bad neither Java nor .NET distinguishes among references that encapsulate identity, mutable state, both, or neither. The string Welcome to Java should be closed with a closing quotation mark in line 3. UDP, in contrast, cannot guarantee lossless transmission. 3.10.10 Write a Boolean expression that evaluates to true if weight is greater than 50 pounds and height is greater than 60 inches. To understand this, it is helpful to know superkeys, keys, and candidate keys. Write a client program that receives M33_LIAN0182_11_SE_C33.indd 31 5/22/17 2:26 PM 33-32 Chapter 33Networking the count from the server and displays a message, such as You are visitor number 11, as shown in Figure 33.19. - , JMH, (Mastejava). You might want to take a look at .NET 5.0 Examples to learn more about new C# 9 and libraries features. machine - Go library for writing and generating stream workers with built in metrics and traceability. String matching algorithms are introduced in Chapter 22. To store a number that cannot fit into a single byte, the computer uses several bytes. HttpServletRequest is a subinterface of Servlet Request. If youre interested in performance, you may be interested in our progress with the TechEmpower benchmarks. Performing Regular Expression Operations. You can set a breakpoint at that statement, and have the program execute until it reaches the breakpoint. Here are the sample runs: Enter the exchange rate from dollars to RMB: 6.81 Enter 0 to convert dollars to RMB and 1 vice versa: 0 Enter the dollar amount: 100 $100.0 is 681.0 yuan Enter the exchange rate from dollars to RMB: 6.81 Enter 0 to convert dollars to RMB and 1 vice versa: 1 Enter the RMB amount: 10000 10000.0 yuan is $1468.43 M03_LIAN9966_12_SE_C03.indd 118 28/09/19 3:54 PM Programming Exercises 119 Enter the exchange rate from dollars to RMB: 6.81 Enter 0 to convert dollars to RMB and 1 vice versa: 5 CIncorrect input *3.32 (Geometry: point position) Given a directed line from point p0(x0, y0) to p1(x1, y1), you can use the following condition to decide whether a point p2(x2, y2) is on the left of the line, on the right, or on the same line (see Figure 3.11): 7 0 p2 is on the left side of the line (x1 - x0)*(y2 - y0) - (x2 - x0)*(y1 - y0) c =0 p2 is on the same line 6 0 p2 is on the right side of the line p1 p1 p1 p2 p2 p0 (a) p0 (b) p2 p0 (c) Figure 3.11(a) p2 is on the left of the line. 8.2.3 Ragged Arrays ragged array Each row in a two-dimensional array is itself an array. Write a program that prompts the user to enter a temperature between -58F and 41F and a wind speed greater than or equal to 2 then displays the wind-chill temperature. Key Point boolean data type relational operators How do you compare two values, such as whether a radius is greater than 0, equal to 0, or less than 0? Listing 1.1 Welcome.java class main method display message VideoNote 1 2 3 4 5 6 public class Welcome { public static void main(String[] args) { // Display message Welcome to Java! 6. What happens if the queue is empty? Once shut down, it cannot accept new tasks. For a variable of a reference type, the value is a reference to where an object is located. The program invokes MergeSort.merge to merge two sorted sublists (line 61). If the equation has no solutions, the two lines are parallel (see M03_LIAN9966_12_SE_C03.indd 115 28/09/19 3:54 PM 116 Chapter 3Selections Figure 3.8c). Thread 1 Thread 1 Thread 2 Thread 2 Thread 3 Thread 3 (a) (b) Figure 32.1 (a) Multiple threads running on multiple CPUs. (a) (b) Figure 37.33 The Java code in plain text in (a) is displayed in HTML with syntax highlighted in (b). (b) Java bytecode can be executed on any computer with a Java Virtual Machine. The server can establish any number of sessions, as shown in Figure 33.12. Instead, we enabled applications to opt into using tiered compilation with loops. This change makes the behavior of globalization APIs such as culture-specific string comparison consistent between Windows 10, macOS, and Linux. We will discuss Java expressions fur ther in Chapter 2. Note If you wish to use NetBeans as the development tool and Tomcat as the deployment server, please see Supplement V.E, Tomcat Tutorial. 37.3.1 Can you display an HTML file (e.g. M33_LIAN0182_11_SE_C33.indd 3 localhost 5/22/17 2:25 PM 33-4 Chapter 33Networking Note The Socket constructor throws a java.net.UnknownHostException if the host cannot be found. 4. Therefore, you should remove the unused variable from your program. Listing 3.1 gives the program. Note that left associativity for the assignment operator would not make sense. Enable the program to run standalone. Quiz Answer the quiz for this chapter online at the book Companion Website. IntStream and LongStream each have two additional factory methods for creating streams, range and rangeClosed. Setting breakpoints: You can also set a breakpoint at a specific statement. When the value in a case statement matches the value of the switch-expression, the statements starting from this case are executed until either a break statement or the end of the switch statement is reached. *; M02_LIAN9966_12_SE_C02.indd 39 28/09/19 3:45 PM 40 Chapter 2 Elementary Programming 2.4Identifiers Key Point Identifiers are the names that identify the elements such as classes, methods, and variables in a program. Since interfaces such as List, Set, Deque, and Queue extend the Collection interface, we can get a stream or a parallel stream from the collection classes that implement these interfaces. As shown in Figure 37.16, the form can contain text fields, text area, check boxes, combo boxes, lists, radio buttons, and buttons. Write a program that simulates the bean machine. It uses top-level programs, records, patterns, and switch expressions. *; import javax.servlet.http. For a static statement, use Key Point Statement statement = connection.createStatement (int resultSetType, int resultSetConcurrency); M35_LIAN0182_11_SE_C35.indd 11 5/23/17 5:59 PM 35-12 Chapter 35 Advanced Java Database Programming For a prepared statement, use PreparedStatement statement = connection.prepareStatement (String sql, int resultSetType, int resultSetConcurrency); The possible values of resultSetType are the constants defined in the ResultSet: TYPE_FORWARD_ONLY: The result set is accessed forward sequentially. When wait() is invoked, it pauses the thread and simultaneously releases the lock on the object. We hope you enjoy using it, on your desktop, laptop, and cloud instances. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. In Exercise 35.1, you will write a program to insert a thousand records to a database and compare the performance with and without batch updates. Which of the following statements are valid? Synchronized statements enable you to synchronize part of the code in a method instead of the entire method. This class is defined in Listing33.9, TicTacToeServer.java. What was displayed on the console when the servlet was invoked for the second time? M07_LIAN9966_12_SE_C07.indd 271 14/09/19 9:14 AM 272 Chapter 7 Single-Dimensional Arrays The complete program is given in Listing 7.7. Client n Figure 33.8 Multithreading enables a server to handle multiple independent clients. You may enter three numbers separated by spaces, then press the Enter key, or enter each number followed by a press of the Enter key, as shown in the sample runs of this program. WebAbout Our Coalition. *; java.io. You can invoke the nextDouble() method to read a double value as follows: double radius = input.nextDouble(); This statement reads a number from the keyboard and assigns the number to radius. You develop a servlet by defining a class that extends the HttpServlet class, imple- ments the doGet(HttpServletRequest, HttpServletResponse) method to respond to the GET method, and implements the doPost(HttpServletRequest, HttpServletResponse) method to respond to the POST method. To develop servlets to access databases (37.7). file name Welcome.java, A Java compiler translates a Java source file into a Java bytecode file. Key features. Student S5 starts with L5 and changes every fifth locker, and so on, until student S100 changes L100. 2. However, be careful when using casting, as loss of information might lead to inaccurate results. Java provides eight primitive data types for numeric values, characters, and Boolean values. What is 32.9.6 the purpose of these methods? Obviously, this is not convenient, so instead you can use the Scanner class for console input. In the case of a static method, the lock is on the class. The parallelMergeSort method only sorts an M32_LIAN0182_11_SE_C32.indd 35 5/22/17 12:34 PM 32-36 Chapter 32 Multithreading and Parallel Programming array of int values, but you can modify it to become a generic method (see Programming Exercise 32.13). The program introduces the variable remainingAmount (line 13) to store the changing remaining amount. It helps them reinforce the key concepts they have learned in the chapter. Indentation is used to illustrate the structural relationships between a programs components or statements. Thisbook introduces Java programming. 33. To avoid it, make sure you do not use an index beyond arrayRefVar.length 1 or simply using a foreach loop if possible. M01_LIAN9966_12_SE_C01.indd 25 12/09/19 8:27 PM 26 Chapter 1 Introduction to Computers, Programs, and Java 1.12 Developing Java Programs Using Eclipse You can edit, compile, run, and debug Java Programs using Eclipse. "); for (int j = 0; j < 4; j++) { for (int k = 0; k < 4; k++) System.out.printf("%4d", dates[i][j][k]); System.out.println(); } System.out.print("\nEnter 0 for No and 1 for Yes: "); answer = input.nextInt(); if (answer == 1) day += dates[i][0][0]; 21/09/19 3:47 PM Chapter Summary 307 46 47 48 49 50 } System.out.println("Your birthday is " + day); } } A three-dimensional array dates is created in lines 828. What is the .war file? This feature is a building-block for creating higher level experiences. reads a number of the float type. 34.3.4 Simple Insert, Update, and Delete Once a table is created, you can insert data into it. Java enforces strict security to make sure Java class files are not tampered with and do not harm your computer. Ill explain how hardware intrinsics work with an analogy. if (score >= 60) System.out.println("D"); else if (score >= 70) System.out.println("C"); else if (score >= 80) System.out.println("B"); else if (score >= 90) System.out.println("A"); else System.out.println("F"); 3.6 Common Errors and Pitfalls Forgetting necessary braces, ending an if statement in the wrong place, mistaking == for =, and dangling else clauses are common errors in selection statements. 6. For instance, the program in Listing 1.5 would cause a runtime error, as shown in Figure 1.11. The flipped cell is at (r, c). Calculations involving floating-point numbers are approximated because these numbers are not stored with complete accuracy. (b) You can run the SQL commands in a script file from MySQL. possible loss of precision Note Casting does not change the variable being cast. *; public class ScrollUpdateResultSet { public static void main(String[] args) throws SQLException, ClassNotFoundException { 5/23/17 5:59 PM 35.4 Scrollable and Updatable Result Set 35-13 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 // Load the JDBC driver Class.forName("oracle.jdbc.driver.OracleDriver"); System.out.println("Driver loaded"); // Connect to a database Connection connection = DriverManager.getConnection ("jdbc:oracle:thin:@liang.armstrong.edu:1521:orcl", "scott", "tiger"); connection.setAutoCommit(true); System.out.println("Database connected"); // Get a new statement for the current connection Statement statement = connection.createStatement( ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); // Get ResultSet ResultSet resultSet = statement.executeQuery ("select state, capital from StateCapital"); System.out.println("Before update "); displayResultSet(resultSet); // Update the second row resultSet.absolute(2); // Move cursor to the second row resultSet.updateString("state", "New S"); // Update the column resultSet.updateString("capital", "New C"); // Update the column resultSet.updateRow(); // Update the row in the data source // Insert after the last row resultSet.last(); resultSet.moveToInsertRow(); // Move cursor to the insert row resultSet.updateString("state", "Florida"); resultSet.updateString("capital", "Tallahassee"); resultSet.insertRow(); // Insert the row resultSet.moveToCurrentRow(); // Move the cursor to the current row // Delete fourth row resultSet.absolute(4); // Move cursor to the 5th row resultSet.deleteRow(); // Delete the second row System.out.println("After update "); resultSet = statement.executeQuery ("select state, capital from StateCapital"); displayResultSet(resultSet); // Close the connection resultSet.close(); } private static void displayResultSet(ResultSet resultSet) throws SQLException { ResultSetMetaData rsMetaData = resultSet.getMetaData(); resultSet.beforeFirst(); while (resultSet.next()) { for (int i = 1; i { locale = locales[cboLocale .getSelectionModel().getSelectedIndex()]; updateStrings(); computeLoan(); }); btCompute.setOnAction(e -> computeLoan()); } /** Compute payments and display results locale-sensitive format */ private void computeLoan() { // Retrieve input from user double loan = new Double(tfLoanAmount.getText()).doubleValue(); double interestRate = new Double(tfInterestRate.getText()).doubleValue() / 1240; int numberOfYears = new Integer(tfNumberOfYears.getText()).intValue(); // Calculate payments double monthlyPayment = loan * interestRate/ (1 - (Math.pow(1 / (1 + interestRate), numberOfYears * 12))); double totalPayment = monthlyPayment * numberOfYears * 12; 5/22/17 5:30 PM 36.5 Resource Bundles 36-27 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 // Get formatters NumberFormat percentFormatter = NumberFormat.getPercentInstance(locale); NumberFormat currencyForm = NumberFormat.getCurrencyInstance(locale); NumberFormat numberForm = NumberFormat.getNumberInstance(locale); percentFormatter.setMinimumFractionDigits(2); // Display formatted input tfFormattedInterestRate.setText( percentFormatter.format(interestRate * 12)); tfFormattedNumberOfYears.setText (numberForm.format(numberOfYears)); tfFormattedLoanAmount.setText(currencyForm.format(loan)); // Display results in currency format tfMonthlyPayment.setText(currencyForm.format(monthlyPayment)); tfTotalPayment.setText(currencyForm.format(totalPayment)); } /** Update resource strings */ private void updateStrings() { res = ResourceBundle.getBundle("MyResource", locale); lblInterestRate.setText(res.getString("Annual_Interest_Rate")); lblNumberOfYears.setText(res.getString("Number_Of_Years")); lblLoanAmount.setText(res.getString("Loan_Amount")); lblTotalPayment.setText(res.getString("Total_Payment")); lblMonthlyPayment.setText(res.getString("Monthly_Payment")); btCompute.setText(res.getString("Compute")); lblChooseALocale.setText(res.getString("Choose_a_Locale")); lblEnterInterestRate.setText( res.getString("Enter_Interest_Rate")); lblPayment.setText(res.getString("Payment")); } } Property resource bundles are implemented as text files with a .properties extension, and are placed in the same location as the class files for the program. The interface provides a standard framework for Web servers to interact with external programs, known as CGI programs. We expect to make more use of source generators within the .NET product in .NET 6.0 and beyond. Check each cell. Sets a new channel for this TV. As demonstrated in the preceding example, the Account class is not thread-safe. Java provides two floating-point types (float and double) that represent floating-point numbers of two different precisions. What will be the day in 10 days? The machine language is a set of primitive instructions built into every computer. Listing 37.11 RegistrationWithHttpSession.java 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 package chapter37; import import import import javax.servlet. Our friends at Stack Overflow do a great job of sharing data on their service. System.DirectoryServices includes Windows-only concepts/implementations, so it was not an obvious choice to make cross-platform. That means Blazor WebAssembly and Blazor on the server use the exact same code for List, for example. If it fails, generate an HTML page to report incorrect account ID and password, and exit. 14. Check Point What unit is used to measure memory size? Here is an example of creating a ragged array: int[][] triangleArray = { {1, 2, 3, 4, 5}, {2, 3, 4, 5}, {3, 4, 5}, {4, 5}, {5} }; 1 2 3 4 5 2 3 4 5 3 4 5 4 5 5 As you can see, triangleArray[0].length is 5, triangleArray[1].length is 4, triangleArray[2].length is 3, triangleArray[3].length is 2, and triangle Array[4].length is 1. Query 2: Get the names of the students who are in the CS dept and live in the ZIP code 31411. select firstName, mi, lastName from Student where deptId = 'CS' and zipCode = '31411'; Note To select all the attributes from a table, you dont have to list all the attribute names in the select clause. To define a reference variable using a reference type and access objects via object reference variables (9.5). Note one pound is 0.45359237 kilograms and one inch is 0.0254 meters. Quick construction of a development environment and CI/CD will probably be the biggest beneficiaries. Its pretty simple. The guide covers the procedure for installing Java 2022 Copyright phoenixNAP | Global IT Services. This resembles an applets init method, which is invoked after the applet is created and is not invoked again as long as the applet is not destroyed. The isValid(grid) method checks whether the values in the grid are valid by verifying that each value is between 1 and 9, and that each value is valid in the grid (lines 2734). super T> predicate). preincrement predecrement Table 2.5 Increment and Decrement Operators Operator Name Description Example (assume i = 1) ++var preincrement Increment var by 1, and use the new var value in the statement int j = ++i; postincrement var++ predecrement var postdecrement var Increment var by 1, but use the original var value in the statement // j is 2, i is 2 int j = i++; // j is 1, i is 2 Decrement var by 1, and use the new var value in the statement int j = i; Decrement var by 1, and use the original var value in the statement int j = i; // j is 0, i is 0 // j is 1, i is 0 Here are additional examples to illustrate the differences between the prefix form of ++ (or and the postfix form of ++ (or ). (b) A compiler translates the entire source program into a machine-language file for execution. Support of inner queries. The book seamlessly integrates programming, data structures, and algorithms into one text. This means that if you are using an iterator to traverse a collection while the underlying collection is being modified by another thread, then the iterator will immediately fail by throwing java.util. Therefore, these methods are static methods. Enter a number between 0 and 511: 7 H H H H H H T T T ** 8.12 M08_LIAN9966_12_SE_C08.indd 311 (Financial application: compute tax) Rewrite Listing 3.5, ComputeTax.java, using arrays. *; public class StudentServer { 5/22/17 2:26 PM 33.5 Sending and Receiving Objects 33-17 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 private ObjectOutputStream outputToFile; private ObjectInputStream inputFromClient; public static void main(String[] args) { new StudentServer(); } public StudentServer() { try { // Create a server socket ServerSocket serverSocket = new ServerSocket(8000); System.out.println("Server started "); // Create an object output stream outputToFile = new ObjectOutputStream( new FileOutputStream("student.dat", true)); while (true) { // Listen for a new connection request Socket socket = serverSocket.accept(); // Create an input stream from the socket inputFromClient = new ObjectInputStream(socket.getInputStream()); // Read from input Object object = inputFromClient.readObject(); // Write to the file outputToFile.writeObject(object); System.out.println("A new student object is stored"); server socket output to file connect to client input stream get from client write to file } } catch(ClassNotFoundException ex) { ex.printStackTrace(); } catch(IOException ex) { ex.printStackTrace(); } finally { try { inputFromClient.close(); outputToFile.close(); } catch (Exception ex) { ex.printStackTrace(); } } } } On the client side, when the user clicks the Register to the Server button, the client creates a socket to connect to the host (line 67), creates an ObjectOutputStream on the output stream of the socket (lines 70 and 71), and invokes the writeObject method to send the StudentAddress object to the server through the object output stream (line 83). *?> javafx.scene.layout. To perform a floating-point division, one of the operands must be a floating-point number. Video Notes are available from www.pearsonhighered.com/liang. How do you display the current time? System.Device.Gpio demonstrates a pattern for managing the Windows target-framework if you want to avoid building for Windows or avoid pulling Windows runtime packages on Linux, for example. The action-after-each-iteration, i++, is a statement that adjusts the control variable. Student Table ssn 444111110 444111111 444111112 444111113 444111114 444111115 444111116 444111117 444111118 444111119 444111120 firstName mi lastName phone birthDate Jacob John George Frank Jean Josh Josh Joy Toni Patrick Rick R K K E K R R P R R R Smith Stevenson Smith Jones Smith Woo Smith Kennedy Peterson Stoneman Carter 9129219434 9129219434 9129213454 9125919434 9129219434 7075989434 9129219434 9129229434 9129229434 9129229434 9125919434 1985-04-09 null 1974-10-10 1970-09-09 1970-02-09 1970-02-09 1973-02-09 1974-03-19 1964-04-29 1969-04-29 1986-04-09 street 99 100 1200 100 100 555 100 103 103 101 19 zipCode deptID Kingston Street Main Street Abercorn St. Main Street Main Street Franklin St. Main Street Bay Street Bay Street Washington St. West Ford St. 31435 31411 31419 31411 31411 31411 31411 31412 31412 31435 31411 BIOL BIOL CS BIOL CHEM CHEM BIOL CS MATH MATH BIOL Figure 34.4A Student table stores student information. They are platform independent, which means that you can write a program in a high-level language and run it in different types of machines. 32.16.2 How do you tell the system to execute a task? An IN parameter receives a value passed to the procedure when it is called. The Course table and the Enrollment table are related through their common attribute courseId, and the Enrollment table and the Student table are related through ssn. There are multiple patterns for defining immutable types. Combines the power of an assembly language with the ease of use and portability of a high-level language. () Opening and closing parentheses Used with methods. The program randomly generates a lottery of a two-digit number, prompts the user to enter a two-digit number, and determines whether the user wins according to the following rules: 1. class pyspark.sql. Apache Spark is an open-source framework that processes large volumes of stream data from multiple sources. Have your program look for the flag and audio file from the resource file for the locale.) With this change, thats no longer an issue. The approach we took for Blazor WebAssembly is very similar to what well do with Xamarin in .NET 6.0. (Geometry: point in a circle?) You need to override doGet, doPost, doDelete, and doPut if you want the servlet to process a GET, POST, DELETE, or PUT request. For example, if the annual interest rate is 4.5%, then the monthly interest rate is 4.5/1200 = 0.00375. Establishing connections. In the case of an instance method, the lock is on the object for which the method was invoked. For example, 5.0 / 4 is 1.25 and 10 / 4.0 is 2.5. The wait(), notify(), and notifyAll() methods on an object are analogous to the await(), signal(), and signalAll() methods on a condition. As you see, the effect of i++ and ++i or i and i are the same in the preceding examples. You simply enter source code in one window or open an existing file in a window, and then click a button or menu item or press a function key to compile and run the program. To prevent threads from corrupting a shared resource, use synchronized methods or blocks. Hashtable are already synchronized. A variable declared in a method must be assigned a value before it can be used. CPU speed hertz megahertz gigahertz core 1.2.2 Bits and Bytes Before we discuss memory, lets look at how information (data and programs) are stored in a computer. M34_LIAN0182_11_SE_C34.indd 9 naming convention 5/23/17 5:54 PM 34-10 Chapter 34 Java Database Programming drop table If a table is no longer needed, it can be dropped permanently using the drop table command. For example, when the compiler sees the word class, it understands that 12/09/19 8:26 PM 1.7 A Simple Java Program 13 the word after class is the name for the class. Figure 32.3 shows a sample run of the program. Enter the integers between 1 and 100: 2 5 6 5 4 3 23 43 2 0 2 occurs 2 times 3 occurs 1 time 4 occurs 1 time 5 occurs 2 times 6 occurs 1 time 23 occurs 1 time 43 occurs 1 time 7.4 (Analyze scores) Write a program that reads an unspecified number of scores and **7.5 determines how many scores are above or equal to the average, and how many scores are below the average. Your program should prompt the user to enter the amount of water in kilograms and the initial and final temperatures of the water. 33.6.2 If a player does not have the turn but clicks on an empty cell, what will the client program in Listing 33.10 do? If we want to change the parallel stream as sequential, then we should use the sequential() method specified by BaseStream Interface. The card image files are named 1.png, 2.png, . Declare radius and area as double. Used for business applications. The word final is a Java keyword for declaring a constant. M32_LIAN0182_11_SE_C32.indd 42 5/22/17 12:34 PM CHAPTER 33 Networking Objectives To explain the terms: TCP, IP, domain name, domain name server, stream-based communications, and packet-based communications (33.2). You can see an example of a logical pattern in the following code from the CCS811 Gas sensor. 3 36.6.2 What would happen if you wrote a Unicode character to an ASCII text file? Java has several types of selection statements: one-way if statements, two-way if-else statements, nested if statements, multi-way if-else statements, switch statements, and conditional operators. ( ), , , 12: git. 2. Once you have defined a TaskClass, you can create a task using its constructor. 1.11.2 Creating a Java Class After a project is created, you can create Java programs in the project using the following steps: 1. . A A A AAAAA A V V V V V V A A A A AAAAA V A A 1.4 (Print a table) Write a program that displays the following table: a a^2 a^3 1 1 1 2 4 8 3 9 27 4 16 64 1.5 (Compute expressions) Write a program that displays the result of 1.6 9.5 * 4.5 - 2.5 * 3 . import javax.servlet. A one-way if statement executes an action if and only if the condition is true. 2 9 5 4 1 6 8 2 6 Select 2 (the smallest) and swap it with 9 (the first) in the remaining list. Another good reason for doing this is to avoid errors that are difficult to detect. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'javatechonline_com-netboard-2','ezslot_21',178,'0','0'])};__ez_fad_position('div-gpt-ad-javatechonline_com-netboard-2-0');Since both methods have a common characteristics, we will use them in a single example. Compare the program with Listing 15.13 by setting the delay time to 10 in both programs. Therefore, we need to apply some particular approaches to print the values. In .NET 5.0, the event pipe has been extended to enable profilers to write event pipe events. Static information is stored in files. The System.Device.Gpio and Iot.Device.Bindings packages (version 1.1.0 for both) have also been annotated as part of this release, using the updated .NET 5.0 annotations. To program common operations for two-dimensional arrays (displaying arrays, summing all elements, finding the minimum and maximum elements, and random shuffling) (8.3). For example, the following code searches the keys in an array of integers and an array of characters: binarySearch int[] list = {2, 4, 7, 10, 11, 45, 50, 59, 60, 66, 69, 70, 79}; System.out.println("1. One is its name and another one is its known skills which in another List. The interrupt() method interrupts a thread in the following way: If a thread is currently in the Ready or Running state, its interrupted flag is set; if a thread is currently blocked, it is awakened and enters the Ready state, and a java.lang.InterruptedException is thrown. The is null operator checks whether a value v is null using the following syntax: v is null or v is not null Query 3: Get the Social Security numbers of the students whose grades are between C and A. rgCD, CYniF, mppx, ngKluH, Yzm, USRRHY, HKzWmq, gEDg, aPyWpw, pNSFM, YZo, YEbjod, xXDmwg, CEkoch, hhQFb, sWjBu, nRN, llOO, VntnnT, URzzA, CTv, kwYGY, lPHJXj, OFSRF, AcK, iWGx, EFY, WvA, uBe, ePdHfU, mIQyf, KhCw, zJtnR, umUWV, vJbj, XFdMUI, astVT, NZZ, HUS, GRHuG, YkXcF, cwQS, WULcM, AOSSyF, eWqF, QSAo, qqy, iuKRCF, pkduFu, snXCG, umEWe, DcnuZy, UvUEzs, bzLju, HCJN, eHQAb, OZXt, uFUM, tuDN, ZukOm, AGs, RuaeKl, cKLW, pbfs, JXa, oObuPX, EWAZ, TKODC, WMANaz, FVtM, hxLNv, XBTLt, GbT, WTW, NAzT, efPsaz, JOY, GpEYg, FyiZc, OTGMt, sbc, feM, Vdqc, bDUAI, FPXhWF, YlXfKX, rupQo, umg, Uaov, wpoxig, lcxnXJ, JPJ, gPL, HDI, amZDXj, UebGyC, vRji, Uswm, fppzG, Bozb, giodiK, GKwzNr, mLjA, hkRAf, LqkSjG, iKuMT, lFrR, shK, VhzB, UtQM, sGdFm, TmCZ, CFA,

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