Java课程“新”得（六）

作业要求：做一个抽奖系统，要求可以设定参与抽奖的总人数和奖项的个数，获奖不可重复

import java.awt.Panel;
import java.awt.ScrollPane;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashSet;
import java.util.Random;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;

public class Choujiang {
JTextArea t=new JTextArea();
public static void main(String[] args) {
// TODO Auto-generated method stub
new Choujiang().init();

}
public void init(){
	Panel p=new Panel();
	JFrame jf=new JFrame("抽奖系统");
	Box h=Box.createHorizontalBox();
	Box v=Box.createVerticalBox();
	JButton b=new JButton("	启动");
	A(b);
	p.add(new JLabel("开始抽奖"));
	p.add(b);
	v.add(p);
	h.add(v);
	ScrollPane sp=new ScrollPane(ScrollPane.SCROLLBARS_AS_NEEDED);
	sp.add(t);
	h.add(sp);
	jf.add(h);
	jf.setVisible(true);
	jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	jf.setBounds(400,400,400,400);
}
public void A(final JButton b) {
	 b.addActionListener(new ActionListener() {
	 @Override
	 public void actionPerformed(ActionEvent e) {
	 // TODO Auto-generated method stub
	 Random random = new Random();
	 Object[] values = new Object[6];
	 HashSet hashSet = new HashSet();

	for(int i = 0;i < values.length;i++){
	 int number = random.nextInt(1000) + 1;
	 hashSet.add(number);
	 }

	values = hashSet.toArray();

	t.append("一等奖号"+values[0] + "
");
	 t.append("二等奖号"+values[1]+" " +values[2]+"
");
	 t.append("三等奖号"+values[3]+" "+values[4]+" "+values[5]+"
");
	 t.append("恭喜获奖者");

	}
	 });
	 }
	 }