Debugging Java program code with eclipse

To create a Java project

When Eclipse first starts with a resource perspective, in which you can manage projects, folders, files, and other resources, as Eclipse says, these panels are called views, and a complete set of views is called a perspective, and in a resource perspective, You can use the top left view (Navigation view) to navigate and create resources.

Before doing things in eclipse, such as creating a Java program, you create a Java project, and the steps to create a Java project are as follows:

1, in the Navigation view right click on the pop-up context menu to select new Items;

2, in the New Project dialog box, Eclipse provides the project options: Java, plug-in development, and so on. So you want to create a Java project, select Java on the left side of the dialog box;

3, select the Java project on the right of the dialog box, if you also installed other Java Plug-in development package, here will be listed together (such as ejb,servlet, etc.), the Eclipse default installed JDT only support standard Java applications, so you must choose the Java Project option;

4, click Next to enter the New Project Wizard dialog box;

5, first give the project a name, because it is a simple "Hello, world" example, so here I enter "Hello", click Next, set up the Java Project setup options, for this project you do not need to make any changes;

6, click to complete;

7, eclipse will prompt you this project is associated with the Java perspective, and ask you whether to switch to the Java perspective, select Yes.

Creating Java Classes

When you've created a Java project, you can start creating Java programs, although it's not necessary to do this, it's a good practice to organize your Java classes into packages, usually using a domain name as a package name, so you can reduce the likelihood of a name conflict, and if you don't have a domain name, you can use either What convenient, unique name, I use org.eclipseguide here, the project name is Hello, so the full name of the package is Org.eclipseguide.hello.

Follow these steps to create a Java program:

1, on the project right click, select New.class pop-up Java Class Wizard;

2. The first field area "source folder" defaults to the folder of the item, keeping the default value;

3, input the Org.eclipseguide.hello in the Packet field area;

4, in the Class Name section area input HelloWorld;

5. In the "Which method stubs Would you like to Create" area, select public static void Main (string[] args), and the New Java Class dialog box is shown in Figure 1.

Figure 1 Creating a HelloWorld class using the New Java Class Wizard