textfield1.java

这是一些JAVA的例子,很经典,值得一看.建议初学者来

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

public class textfield1 extends Applet implements ActionListener
{
	TextField txtfld1,txtfld2;
	public void init()
	{
		txtfld1=new TextField(20);
		txtfld2=new TextField(20);
		add(txtfld1); 
		add(txtfld2); 
		txtfld2.setEditable(false);
		txtfld1.addActionListener(this);
	}

	public void actionPerformed(ActionEvent evt)
	{
		if((evt.getSource()==txtfld1)&&(txtfld1.getText().equals("black")))
		{
			txtfld1.setText("");
			txtfld2.setText("Tel: [phone]");
		}
		else if((evt.getSource()==txtfld1)&&(txtfld1.getText().equals("smith")))
		{
			txtfld1.setText("");
			txtfld2.setText("Tel: [phone]");
		}
		else if((evt.getSource()==txtfld1)&&(txtfld1.getText().equals("white")))
		{
			txtfld1.setText("");
			txtfld2.setText("Tel: [phone]");
		}
		else
		{
			txtfld1.setText("");
			txtfld2.setText("No Such Telephone Number");
		}
	}
}