Question

我正在尝试在我的程序中添加封面。所以我使用卡片布局。

import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
import java.lang.Object;
import java.io.*;
import sun.audio.*;
import java.net.URL;
import javax.sound.sampled.*;
import java.applet.*;
import java.util.*;

public class Game extends JFrame{
    public static CardLayout cl = new CardLayout();
    public static JPanel dasar = new JPanel(cl);
public Game() {
        dasar.add(new Opening(),"Opening");
        dasar.add(new level1(),"Level 1");
        dasar.add(new level2(),"Level 2");
        dasar.add(new level3(),"Level 3");
        dasar.add(new level4(),"Level 4");
        add(dasar,BorderLayout.CENTER);
        /*KeyboardListener listener = new KeyboardListener();
        opening();
        addKeyListener(listener);*/    
    }

    public static void main(String [] args){
        Game G = new Game();
        G.setTitle("PuzzleGame");
        G.setSize(800,550);
        G.setLocationRelativeTo(null);
        G.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        G.setVisible(true);
    }
}

我开了这样的开场课：

class Opening extends JPanel{
public Opening(){
    AudioClip AudioOp = Applet.newAudioClip(this.getClass().getResource("opening.wav"));

    JLabel atasan = new JLabel(new ImageIcon(getClass().getResource("TOP.png")));
    JLabel bawahan = new JLabel(new ImageIcon(getClass().getResource("btm.png")));
    JLabel nama = new JLabel(new ImageIcon(getClass().getResource("namakelompok.png")));
    JLabel background = new JLabel(new ImageIcon(getClass().getResource("background.jpg")));

    JPanel panel1 = new JPanel();
    panel1.setLayout(null);
    panel1.add(atasan);
    panel1.add(bawahan);
    panel1.add(nama);
    panel1.add(background);
    add(panel1);
    background.setBounds(0,0,800,550);
    atasan.setBounds(100,50,600,100);
    bawahan.setBounds(232,450,336,46);
    nama.setBounds(194,180,411,205);
}
}

为什么我编译此程序时无法显示任何内容？它就像一个空白的窗口给我一个建议。对不起，我是初学者。

Answer 1

将以下内容移动到构造函数中：

    G.setTitle("PuzzleGame");
    G.setSize(800,550);
    G.setLocationRelativeTo(null);
    G.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    G.setVisible(true);

所以你的课程和主要内容如下：

import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
import java.lang.Object;
import java.io.*;
import sun.audio.*;
import java.net.URL;
import javax.sound.sampled.*;
import java.applet.*;
import java.util.*;

public class Game extends JFrame{
    public static CardLayout cl = new CardLayout();
    public static JPanel dasar = new JPanel(cl);
public Game() {

        super("PuzzleGame");
        this.setSize(800,550);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        dasar.add(new Opening(),"Opening");
        dasar.add(new level1(),"Level 1");
        dasar.add(new level2(),"Level 2");
        dasar.add(new level3(),"Level 3");
        dasar.add(new level4(),"Level 4");
        add(dasar,BorderLayout.CENTER);

        /*KeyboardListener listener = new KeyboardListener();
        opening();
        addKeyListener(listener);*/    
        this.setVisible(true);
    }

    public static void main(String [] args){
        new Game();
    }
}

class Opening extends JPanel{
    public Opening(){
        AudioClip AudioOp = Applet.newAudioClip(this.getClass().getResource("opening.wav"));

        JLabel atasan = new JLabel(new ImageIcon(getClass().getResource("TOP.png")));
        JLabel bawahan = new JLabel(new ImageIcon(getClass().getResource("btm.png")));
        JLabel nama = new JLabel(new ImageIcon(getClass().getResource("namakelompok.png")));
        JLabel background = new JLabel(new ImageIcon(getClass().getResource("background.jpg")));

        JPanel panel1 = new JPanel();
        panel1.setLayout(null);
        panel1.add(atasan);
        panel1.add(bawahan);
        panel1.add(nama);
        panel1.add(background);
        add(panel1);
        background.setBounds(0,0,800,550);
        atasan.setBounds(100,50,600,100);
        bawahan.setBounds(232,450,336,46);
        nama.setBounds(194,180,411,205);
    }
}

希望这有帮助。

让我知道结果

CardLayout课程无法开放

1 个答案: