testtextarea.java

简单的年月日级联显示

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestTextArea 
{
	public static void main(String[] args) 
	{
		Area a=new Area();
		a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		a.show();
	}
}
class Area extends JFrame implements ActionListener
{ 
	JComboBox jbx;
	JTextArea jta;
	Container c;
	public Area()
	{   setTitle("课程演示");
	    setSize(300,200);
		c=getContentPane();
		String s[]={"Java程序设计","C#程序设计","Oracle数据库","Photoshop图像处理"};
		jbx=new JComboBox(s);jbx.addActionListener(this);
		jta=new JTextArea();
		c.add(jbx,BorderLayout.NORTH);
		c.add(jta,BorderLayout.CENTER);
	}
public void actionPerformed(ActionEvent e)
{
	if(e.getSource()==jbx)
	{
		jta.setText(""+jbx.getSelectedItem());
	}
}
}