Question

java用按钮实现类之间的关闭开启。比方在一个JFrame，有两个Panel类，按钮的事件怎么写好，提供思路

Answer 1

package com.demo.cardLayout;

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;

public class LayoutDemoTest extends JFrame {
private JPanel pane = null; // 主要的JPanel，该JPanel的布局管理将被设置成CardLayout
private JPanel p = null; // 放按钮的JPanel
private CardLayout card = null; // CardLayout布局管理器
private JButton button_1 = null; // 上一步
private JButton button_2 = null; // 下一步

private JPanel p_1 = null, p_2 = null; // 要切换的三个JPanel

public LayoutDemoTest() {
super("CardLayout Test");
try {
// 将LookAndFeel设置成Windows样式
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception ex) {
ex.printStackTrace();
}
/**创建一个具有指定的水平和垂直间隙的新卡片布局*/
card = new CardLayout(5, 5);
pane = new JPanel(card); // JPanel的布局管理将被设置成CardLayout
p = new JPanel(); // 构造放按钮的JPanel
button_1 = new JButton("切换");
button_2 = new JButton("返回");

p.add(button_1);

p.add(button_2);
p_1 = new JPanel();
p_2 = new JPanel();

p_1.setBackground(Color.RED);
p_2.setBackground(Color.BLUE);

p_1.add(new JLabel("JPanel_1"));
p_2.add(new JLabel("JPanel_2"));

pane.add(p_1, "p1");
pane.add(p_2, "p2");

/**下面是翻转到卡片布局的某个组件，可参考API中的文档*/
button_1.addActionListener(new ActionListener(){ // 上一步的按钮动作
public void actionPerformed(ActionEvent e) {
card.show(pane,"p2");
button_1.setEnabled(false);
button_2.setEnabled(true);
}
});
button_2.addActionListener(new ActionListener(){ // 下一步的按钮动作
public void actionPerformed(ActionEvent e) {
// card.next(pane);
card.show(pane,"p1");
button_2.setEnabled(false);
button_1.setEnabled(true);
}
});

this.getContentPane().add(pane);
this.getContentPane().add(p, BorderLayout.SOUTH);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(300, 200);
this.setVisible(true);
}

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

}

Answer 2

你就在按钮上绑定ActionListner不就好了？

追问

我想知道怎么实现这个方法