Netbeans GUI 编辑器生成自己难以理解的代码 [英] Netbeans GUI editor generating its own incomprehensible code

问题描述

在 netbeans 中创建新项目时，如果我选择 JAVA 桌面应用程序，它会创建一些代码，我完全不认为这是我在 Swing 中学到的.

When creating a new project in netbeans, if i select JAVA Desktop application, it creates some code which I DO NOT RECOGNISE AT ALL as what i had learnt in swing.

它导入包，例如:

org.jdesktop.application.SingleFrameApplication;

此外，main() 的声明如下所示:

also, the declaration for main() looks like this :

public static void main(String[] args) {
            launch(DesktopApplication2.class, args);
        }

这对我对 JFrame、JPanel 等的了解确实没有任何意义.

This really does not make any sense to my knowledge of JFrame, JPanel etc..

如果我尝试从头开始编写 netbeans 应用程序，我可以编写自己的 Swing 应用程序，但我找不到 GUI 编辑器.

If i try to code a netbeans application from scratch, i can write my own swing app BUT I CANNOT FIND THE GUI EDITOR.

• 从头开始创建 Java 应用程序时如何带上 GUI 编辑器?
• 谁能向我解释这个 org.jdesktop.application.SingleFrameApplication 和其他类?

请帮忙.这真是令人沮丧.

Please help. This is really frustrating.

推荐答案

您可能无意中选择了 Java 桌面应用程序

基于 Swing 应用程序框架 (JSR 296) 创建桌面应用程序的框架.此模板提供基本的应用程序基础结构，例如菜单栏、窗口状态的持久化和状态栏.使用此模板，您还可以生成代码来为数据库表创建 GUI 界面.

Creates a skeleton of a desktop application based on the Swing Application Framework (JSR 296). This template provides basic application infrastructure such as a menu bar, persisting of window state, and status bar. With this template, you can also generate code to create a GUI interface for a database table.

而不是 Java 应用程序

在标准 IDE 项目中创建新的 Java SE 应用程序.也可以在项目中生成主类.标准项目使用 IDE 生成的 Ant 构建脚本来构建、运行和调试您的项目.

Creates a new Java SE application in a standard IDE project. You can also generate a main class in the project. Standard projects use an IDE-generated Ant build script to build, run, and debug your project.

附录:使用<代码>文件>新建文件Java GUI Forms 添加高级容器，例如一个封闭的 JPanel，可以从 main() 的 run() 方法实例化.

Addendum: Use File > New File > Java GUI Forms to add high-level containers, e.g. an enclosing JPanel, that can be instantiated from main()'s run() method.

例如，Main.main():

package temp;
import java.awt.EventQueue;
import javax.swing.JFrame;

public class Main {
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame f = new JFrame();
                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                f.add(new NewJPanel());
                f.pack();
                f.setVisible(true);
            }
        });
    }
}

还有一个内置在 GUI 编辑器中的 NewJPanel(注意生成的代码"):

And a NewJPanel built in the GUI editor (note "Generated Code"):

package temp;
public class NewJPanel extends javax.swing.JPanel {

    /** Creates new form NewJPanel */
    public NewJPanel() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();

        jLabel1.setText("Hello, world!");

        org.jdesktop.layout.GroupLayout layout =
            new org.jdesktop.layout.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(163, 163, 163)
                .add(jLabel1)
                .addContainerGap(157, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(113, 113, 113)
                .add(jLabel1)
                .addContainerGap(171, Short.MAX_VALUE))
        );
    }// </editor-fold>

    // Variables declaration - do not modify
    private javax.swing.JLabel jLabel1;
    // End of variables declaration
 }

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