buttonevent1.java

Java课程中所有的可运行程序 全部都是java课程中所涉及到的源码

import java.applet.*;
import java.awt.*;
import java.awt.event.*;


 public class ButtonEvent1 extends Applet implements ActionListener{

public void init() {

	l1=new Label("1+1=");
	add(l1);

	txt1=new TextField(1);
	add(txt1);

	b1=new Button("ok");
	b1.addActionListener(this);
	add(b1);

	b2=new Button("cacel");
	b2.addActionListener(this);
	add(b2);

	l2=new Label("Your answer is:");
	add(l2);


	l3=new Label("    init        ");
	add(l3);

	}

	Label l1;
	TextField txt1;
	Label l2;
	Button b1;
	Button b2;
	Label l3;

	public void actionPerformed(ActionEvent e){
   Object obj=e.getSource();
    if(obj==b1) {
        int w=Integer.valueOf(txt1.getText()).intValue();
	   if(w==2)
	    l3.setText("right!");
	    else
	    l3.setText("wrong!");
	    }
	    if(obj==b2){
	     txt1.setText("");
	      l3.setText("");}
	}



    }