第六次作业

import java.awt.BorderLayout;

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.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextArea;

public class ChouJiang extends JFrame{

public ChouJiang(){

this.setTitle("抽奖系统");

this.setSize(250, 180);

this.setResizable(false);

this.setLocationRelativeTo(this);

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

this.setContentPane(createContentPanel());

}

private JPanel createContentPanel(){

JPanel panel=new JPanel(new BorderLayout());

panel.add(BorderLayout.NORTH,createNPanel());

JButton start=new JButton("开始");

panel.add(BorderLayout.CENTER,start);

ScrollPane sp = new ScrollPane(ScrollPane.SCROLLBARS_AS_NEEDED);

final JTextArea area = new JTextArea();

sp.add(area);

panel.add(BorderLayout.SOUTH,sp);

start.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {
// 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.addAll(number);
}
values = hashSet.toArray();
area.append("一等奖号码为:"+values[0] + "\n");
area.append("二等奖号码为:"+values[1]+" " +values[2]+"\n");
area.append("二等奖号码为:"+values[3]+" "+values[4]+" "+values[5]+"\n");
}
});
return panel;
}
private JPanel createNPanel(){
JPanel panel=new JPanel();
panel.add(new JLabel("点击抽奖"),JLabel.CENTER);
return panel;
}
public static void main(String[] args) {
new ChouJiang().setVisible(true);
}

}