ex9.1.txt

JAVA 基础例题包含了JAVA常见的问题和常见的习题

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Gui extends JFrame implements ActionListener
{	JTextField tf=new JTextField(10);
JButton bt=new JButton("ok");
		static int i=0;
		public Gui()
	{	super("图形用户界面框架");
			Container c=getContentPane();       //获得窗口的内容显示层
			c.setLayout(new FlowLayout());		//设置显示层的布局方式
			c.add(tf);c.add(bt);setSize(200,100);	//添加组件
			setVisible(true);					//显示窗口界面
			bt.addActionListener(this);			//给组件加监听
			addWindowListener(new WindowAdapter()
		  	{  public void windowClosing(WindowEvent e)
				{  System.exit(0);}});
		}	
		public void actionPerformed(ActionEvent e)		//事件处理程序
		{	i=i+1;
			if(i%2==0)	tf.setText("aaaaa");
			else	tf.setText("bbbbb");
		}
public static void main(String args[])
	{	new Gui();
}
}