Question

java怎么设置jbutton每点一次的功能都不一样

Answer 1

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package imagetest;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Test extends JFrame {
public Test() {
JButton btn = new JButton("关闭");
this.add(btn, BorderLayout.WEST);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(300, 300);
btn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(JOptionPane.showConfirmDialog(Test.this, "确定关闭吗？","确认",JOptionPane.OK_CANCEL_OPTION)==0)
System.exit(0);}
});
}
public static void main(String[] args) {
new Test().setVisible(true);
}
}