我将把“Public static void main（String [] args）”放在哪里？ [英] Where will i put "Public static void main(String[] args)"?

问题描述

我几天前开始编写java代码。我做了一些成功的程序，但我坚持这一个。
无论我写Public static void main（String [] args）代码，我都会收到错误。大多数时候它告诉我;是期待。我知道把;面对那段代码是错误的。有人能告诉我到底在哪写吗？或者如果可能的话为我修复代码？以下是代码：

I started coding java a few days ago. İ made a few succesfull programs but im stuck on this one. Where ever i write the "Public static void main(String[] args)" code i get an error. Most of the time it tells me that ";" is expected. I know that putting ";" infront of that code is wrong. Can someone tell me where exactly to write that? Or if possible fix the code for me? Here is the code:

import javax.swing.*;
import java.awt.*;

public class Panel_Test extends JFrame{

public static void main(String[] args){
    public Board(){

        super("Java Panel");

        setSize(300,300);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);

        JPanel a = new JPanel();
        JPanel a2 = new JPanel();
        JButton b = new JButton("Button 1");
        JButton c = new JButton("Button 2");
        JCheckBox cb = new JCheckBox("CB1");
        JCheckBox cb2 = new JCheckBox("CB2");
        a.add(b);
        a.add(c);
        a2.add(cb);
        a2.add(cb2);
        add(a, BorderLayout.SOUTH);
        add(a2, BorderLayout.NORTH);
        }
    }
}

推荐答案

让您的构造函数与 main 方法分开，并使其名称与您的类名相同（即 public Panel_Test 因为您的班级名称是 Panel_Test ）。

Have your constructor be separate from the main method, and have its name be the same as your class name (i.e. public Panel_Test since the name of your class is Panel_Test).

public class Panel_Test extends JFrame {
    public Panel_Test() {
        // code here
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Panel_Test();
            }
        });
    }
}

不要忘记对你进行Swing操作Event Dispatch Thread，使用 javax.swing.SwingUtilities 。

Don't forget to do your Swing operations on the Event Dispatch Thread, using javax.swing.SwingUtilities.

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