如果是通过按钮退出就用监听器实现如:
class MyListener2 implements ActionListener {
public void actionPerformed(ActionEvent e) {
System.exit(0)
}
}
一般情况下这两种都有。
如果是要实现单击按钮退出,建议删掉这行代码:if(e.getActionCommand().equals("Eixt"))
或者,将实现接口的两个类变为public的内部类,同时稍微修改下,如下
import java.awt.*
import java.awt.event.*
public class lesson1 {
private Frame f
private Button b
public lesson1() {
f = new Frame("event")
b = new Button("Exit")
}
public void launchFrame() {
b.addMouseListener(new ButtonHandler())
f.addWindowListener(new ClosingHander())
f.add(b, BorderLayout.CENTER)
f.setSize(400, 300)
f.setVisible(true)
f.setVisible(true)
f.setSize(400, 300)
}
public static void main(String args[]) {
lesson1 aa = new lesson1()
aa.launchFrame()
}
class ButtonHandler extends MouseAdapter {
public void mouseClicked(MouseEvent e)
{
if (e.getSource() == b) {
System.exit(0)
}
}
}
class ClosingHander extends WindowAdapter {
public void windowClosing(WindowEvent e) {
System.exit(0)
}
}
}