display.java

管理学生信息

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
class Display extends JFrame implements ActionListener
{
	JRadioButton a1,a2,a3,a4;
	JButton ok,cancel;
	Display(){
		super("表显示");
		setVisible(true);
		setSize(500,400);
		setLayout(new BorderLayout());

		JPanel p=new JPanel();
		p.setLayout(new FlowLayout());
		a1=new JRadioButton("用户表");
		a2=new JRadioButton("课程表");
		a3=new JRadioButton("学生表");
		a4=new JRadioButton("选课表");
		
		ButtonGroup a=new ButtonGroup();
		a.add(a1);a.add(a2);a.add(a3);a.add(a4);
		p.add(a1);p.add(a2);p.add(a3);p.add(a4);
		add("Center",p);

		JPanel p2=new JPanel();
		p2.setLayout(new FlowLayout());
		ok=new JButton("确定");
		cancel=new JButton("取消");
		p2.add(cancel);
		p2.add(ok);
		add("South",p2);
		
		cancel.addActionListener(this);
		ok.addActionListener(this);

		pack();
		validate();
	}
	public void actionPerformed(ActionEvent e){
		if(e.getSource()==ok)
		{
			if(a1.isSelected())
				new Display3("yonghu");
			if(a2.isSelected())
				new Display3("ch");
			if(a3.isSelected())
				new Display3("st");
			if(a4.isSelected())
				new Display3("sc");
		}
		else
			dispose();
	}
}