ch8_2_1.java

java练习程序

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

public class ch8_2_1 extends Applet
{
  static TextField text1,text2,text3,text4;// static
  Techer teacher;
  public void init()
  {
  	text1=new TextField(10);
  	text2=new TextField(10);
  	text3=new TextField(10);
  	add(text1);
  	add(text2);
  	add(text3);
  	
  	teacher=new Techer();
  	text1.addActionListener(teacher);
 	
  	text3.setText("no word");// add myself
  	text4=new TextField(30);// add myself
  	add(text4);// add myself
  	text4.setEditable(false);// add myself
  	text4.setText("enter: boy girl sun");// add myself

  }
}
class Techer implements ActionListener
{  
	public void actionPerformed(ActionEvent e)
	{
		// remember to press enter key
		if((e.getSource()==ch8_2_1.text1)&&(ch8_2_1.text1.getText().equals("boy")))
		{
			ch8_2_1.text3.setText("boy");
		}else if((e.getSource()==ch8_2_1.text2)&&(ch8_2_1.text2.getText().equals("girl")))
		{
			ch8_2_1.text3.setText("girl");
		}else if((e.getSource()==ch8_2_1.text1)&&(ch8_2_1.text1.getText().equals("sun")))
		{
			ch8_2_1.text3.setText("sun");
		}else
		{
			ch8_2_1.text3.setText("no word");
		}
	}
}