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5.3.2   Build a New Java with Ant Project The NetBeans IDE allows you to create and build different projects based on different categories by selecting the right template for your project and completing the remaining wizard steps. First let’s take care of creating a new Java with Ant project. To create a new Java with Ant project under the Apache NetBeans IDE, go to the File|New Project menu item. A New Project wizard is displayed and shown in Figure 5.4. Under the Javawith Ant category, the IDE contains the following standard project templates for Java desktop and Web applications: Let’s give a more detailed discussionRead More →

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5.3.2.1.1   Add a Graphical User Interface To proceed with building our interface, we need to create a Java container within which we will place the other required GUI components. Generally, the most popular Java GUI containers include: In this project, we will create a container using the JFrame component. We will place the con-tainer in a new package, which will appear within the Source Packages node. Perform the following operations to complete this GUI adding process: 1) In the Projects window, right-click on our new created project, JavaAppProject, and choose the New > JFrame Form menu item from the popup menu.2) Enter JavaAppFrame into theRead More →

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5.3.2.1.2   Add Other GUI-Related Components Next let’s finish this GUI by adding some GUI-related components into this GUI container. For this application, we want to add: 1) One JPanel object that can be considered a kind of container.2) Two JTextField objects to retrieve and hold the user’s first and last name.3) Four JLabel objects to display the caption for each JTextField and the user’s full name as the Display button is clicked.4) Three JButton objects, Display, Clear and Exit. The Clear button is used to clean up all content in two JTextField objects (user’s first and last name), and the Exit button is used toRead More →

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5.3.2.1.3   Develop the Code for Three Buttons In fact, only three JButton objects need to be coded, since both TextField objects are used to retrieve and hold the user’s input without any other actions in this application. A similar situation holds for JLabel4, which is used to display the run result of this application. In order to give a function to any button, we need to assign an event handler to each to respond to events. In our case, we want to know what happens when a button is pressed either by mouse click-ing or keyboard pressing. So we will use ActionListener to respond toRead More →

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5.3.2.1.3.2   Code for the Clear Button The function of the Clear button is to clean up all the content in the two TextFields,FirstTextField and LastTextField allow the user to enter a new name. Double-click on the Clear button to open its event handler, and enter the code shown in Figure 5.12 into the event handler. FIGURE 5.12   The code for the ClearButtonActionPerformed() event handler. FIGURE 5.13   The code for the ExitButtonActionPerformed() event handler. When this button is clicked by the user, the setText() method is executed with a null as the argu-ment to clean up the three objects’ contents, FirstTextField, LastTextField and FullNameLabel. 5.3.2.1.3.3   CodeRead More →

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5.3.2.2   Build a Java Class Library As we mentioned, a Java class library is only a skeleton Java class library without a main class, and it cannot be executed itself; instead, it must be called or used by other Java applications. Similarly FIGURE 5.16   The run result of our project. to other general libraries, a Java class library can be statically or dynamically bound or connected to an application and used as a utility class. Since a Java class library cannot be executed itself, we need to create a Java application project to call or use that Java class library. Therefore, we need to createRead More →

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5.3.2.2.2   Create a Java Application Project Perform the following operations to create a new Java application project: 1) Choose the File > New Project menu item. Under Categories, select Java with Ant. Under Projects, select Java Application. Then click on the Next button.2) Enter SumApp into the Project Name field. Make sure the Project Location is set toC:\Oracle DB Programming\Class DB Projects\Chapter 5.3) Enter sumapp.Main as the main class.4) Ensure that the Create Main Class checkbox is checked.5) Click the Finish button. The SumApp project is displayed in the Projects window, and Main.java opens in the Source Editor. Now we have finished creating two JavaRead More →

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5.3.2.2.4  Add Code to the Main.java Tab in the Java Application ProjectNow we need to add some code to Main.java. In doing so, you will see the Source Editor’s code completion and code template (abbreviation) features. 1) Select the Main.java tab in the Source Editor. If it isn’t already open, expand SumApp > Source Packages > sumapp in the Projects window and double-click on the itemMain.java.2) Inside the main() method, replace the comment //TODO code application logic here with the following: int result = Sum3) Leave the cursor immediately after Sum. In the next step, you will use code completion to turn Sum into SumLibClass.4)Read More →

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5.3.2.2.5   Run the Application Project to Call the Java Library The output of this application program, SumApp.java, is based on arguments that you provide when you run the application. As arguments, you can provide two or more integers, from which the added result will be generated. The adding process will be executed by the Java library file sumapp() located in the SumLibClass library, and the execution result will be returned to and displayed in the main() method in the Java application project SumApp.java. Now let’s run the application. Since this application needs arguments as inputs to the main() method, we have to use an alternativeRead More →

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5.3.2.2.6   Build and Deploy the Application The main build command in the NetBeans IDE is the Clean and Build Main Project command. This command deletes previously compiled classes and other build artifacts and then rebuilds the entire project from scratch. Perform the following operations to build the application: 1) Click on the Run > Clean and Build Main Project(SumApp) menu item (Shift-F11).2) Output from the Ant build script appears in the Output window. If the Output window does not appear, you can open it manually by choosing Window > Output.3) When you clean and build your project, the following things occur: a. Output folders thatRead More →