gettextfielddata.java

java练习程序

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

public class GetTextFieldData extends Applet implements ActionListener
{
  TextField text1,text2,text3,text4;
  public void init()
  {
  	text1=new TextField(10);
  	text2=new TextField(10);
  	text3=new TextField(10);
  	add(text1);
  	add(text2);
  	add(text3);
  	
  	text1.addActionListener(this);
  	text2.addActionListener(this);
/* 	
  	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
*/
  }
  public void actionPerformed(ActionEvent e)
  {
  	long n1,n2,n3;
  	// remember to press enter key
  	if(e.getSource()==text1)
  	{
  		long n;
  		String s;
  		n=Long.parseLong(text1.getText());
  		s=text1.getText();
  		n2=n*n;
  		n3=n2*n;
  		text2.setText(String.valueOf(n2));
  		text3.setText(String.valueOf(n3));
  		text3.setText(s);
  	}else
  	{
  	}
  }
}