textfieldevent.java

java中图形用户界面的设计

//JTextField和JPasswordField事件

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class textFieldEvent
{
	public static void main(String args[])
	{
		 myFrame Frame1 = new myFrame("TextField");
		 Frame1.show();
	   Frame1.pack();
	}
}

class myFrame extends JFrame implements ActionListener
{
	JTextField text1,text2,text3;
	myFrame(String str)
	{
		super(str);
		setSize(300,200);

		text1 = new JTextField(10);
		text2 = new JTextField(10);
		text3 = new JTextField(10);

		
		Container Conpane = getContentPane();
		Conpane.setLayout(new FlowLayout());
		
		Conpane.add(text1);
		Conpane.add(text2);
		Conpane.add(text3);
		
		text1.addActionListener(this);
		text2.addActionListener(this);
		text3.addActionListener(this);
	
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});
	}
	
	public void actionPerformed(ActionEvent e)
	{
			displayText(e.getSource());
	}
	
	private void displayText(Object obj)
	{
		JTextField text = (JTextField)obj;
		String  str = text.getText();
		if(str.equals("boy"))
		  text.setText("男孩儿");
		else if(str.equals("girl"))
		  text.setText("女孩儿");
		else if(str.equals("sun"))
			text.setText("太阳");
		else text.setText("没有该单词");
	}
	
}