import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class Test extends Applet
{ Label lbret = new Label();
Button btn = new Button("Test Button");
int y=0;
int x=2;
int a=1;
public Test()
{
this.setLayout(new GridLayout(2,2));
this.add(btn);
this.add(lbret);
btn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
a=a+1;
y = a*x;
lbret.setText("reseult is "+y);
}
});
}
}
import java.applet.*;
import java.awt.event.*;
public class Test extends Applet
{ Label lbret = new Label();
Button btn = new Button("Test Button");
int y=0;
int x=2;
int a=1;
public Test()
{
this.setLayout(new GridLayout(2,2));
this.add(btn);
this.add(lbret);
btn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
a=a+1;
y = a*x;
lbret.setText("reseult is "+y);
}
});
}
}
//这是一个简单的响应按钮的方法
//这些书上也有的.多多看书吧.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class ButtonAction extends JFrame{
int y,a=0,x=0;
public ButtonAction(){
this.addWindowListener (new WindowAdapter(){
public void windowClosing(WindowEvent e){
dispose();
System.exit(0);
}
});
JPanel panel = new JPanel();
JButton button = new JButton("action");
panel.add(button);
setSize(100,100);
getContentPane().add(panel);
pack();
setVisible(true);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
a+=10;
x++;
y=a*x;
System.out.println(y);
}
}); }
public static void main(String args[]){
new ButtonAction().show();
}
}