Question

JAVA BUTTON事件

我在设计Java界面，点一个按钮后出现一个JPane，我想点另一个按钮，然后出现另一个Jpanel，前一个消失，如何实现，十万火急

Answer 1

这个比较简单，在您的JFrame中的SOUTH加两个按钮（可以先放在JPanel中），用于控制JPanel的切换。在CENTER（默认）添加一个主JPanel，设置布局方式为CardLayout，每个Card放置一个JPanel，然后用按钮控制就行了。

Answer 2

一个例子,楼主参考下;
把第一个panelRight.remove(firstPanel);

package baidu;

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

class Panel1 extends JPanel {
public Panel1() {
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();

c.gridx = 0;
c.gridy = 0;
add(new JButton("Test0001"), c);

c.gridx = 0;
c.gridy = 1;
add(new JButton("Test0002"), c);

c.gridx = 1;
c.gridy = 1;
add(new JButton("Test0003"), c);
}
}

class Panel2 extends JPanel {
public Panel2() {
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();

c.gridx = 1;
c.gridy = 0;
add(new JButton("Try0001"), c);

c.gridx = 2;
c.gridy = 0;
add(new JButton("Try0002"), c);

c.gridx = 0;
c.gridy = 1;
add(new JButton("Try0003"), c);
}
}

public class JPanelStudy extends JFrame implements ActionListener {
private JPanel panelLeft = new JPanel();
private JPanel panelRight = new JPanel();
Panel1 firstPanel = new Panel1();
Panel2 secondPane = new Panel2();

public JPanelStudy() {
JPanel contentPane = (JPanel) getContentPane();

contentPane.add(panelLeft, BorderLayout.WEST);
contentPane.add(panelRight, BorderLayout.CENTER);

JButton button1 = new JButton("Button1");
button1.addActionListener(this);
JButton button2 = new JButton("Button2");
button2.addActionListener(this);
panelLeft.add(button1);
panelLeft.add(button2);
}

public void actionPerformed(ActionEvent event) {
JButton button = (JButton) event.getSource();
if (button.getText().equals("Button1")) {

panelRight.add(firstPanel);
panelRight.revalidate();
panelRight.setVisible(true);
} else {

System.out.println("ok");
panelRight.remove(firstPanel);
panelRight.add(secondPane);
panelRight.revalidate();
}
}

public final static void main(String[] args) {
JFrame frame = new JPanelStudy();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(400, 300);
frame.setVisible(true);
}
}