java第六次作業

一個抽獎程序：用ArrayList類和random類
import java.awt.*;

import javax.swing.*;

import java.awt.event.;
import java.util.;
import java.util.List;

public class jRandom extends JFrame {
private JFrame frame;
private JButton startBUtton;

public jRandom() {
	makeFrame();
	frame.pack();
	frame.setVisible(true);
	frame.setSize(400, 215);
	frame.setLocation(550, 350);
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

private void makeFrame() {

	frame = new JFrame(" 抽個獎吧！");
	ImageIcon imageIcon0 = new ImageIcon("t/1.png");
	frame.setIconImage(imageIcon0.getImage());
	Container contentPane = frame.getContentPane();
	startBUtton = new JButton();
	ImageIcon imageIcon1 = new ImageIcon("t/3.png");
	ImageIcon imageIcon2 = new ImageIcon("t/4.png");
	ImageIcon imageIcon3 = new ImageIcon("t/5.png");
	startBUtton.setIcon(imageIcon1);// 設置按鈕形狀
	startBUtton.setRolloverIcon(imageIcon2);// 設置鼠標滑過按鈕的圖像
	startBUtton.setPressedIcon(imageIcon3);// 設置鼠標按下按鈕的形狀
	startBUtton.setMargin(new Insets(0, 0, 0, 0)); // 設置按鈕邊框與邊框內容之間的像素數
	startBUtton.setBorderPainted(false); // 不繪制邊框

	// 按鈕事件監聽
	startBUtton.addActionListener(new ActionListener() {

		@Override
		public void actionPerformed(ActionEvent e) {
			// TODO Auto-generated method stub
			makechoujiang();
		}
	});
	contentPane.add(startBUtton, BorderLayout.CENTER);

}

private void makechoujiang() {
	double baseNum = 0.50;
	String product = "100元,200元,500元,1000元";
	String num = "30,20,5,3";
	String[] p = product.split(",");
	String[] n = num.split(",");
	Random ran = new Random();
	double base = ran.nextDouble();
	if (base > baseNum) {
		ImageIcon imageIcon = new ImageIcon("t/2.png");
		JOptionPane.showMessageDialog(frame, "請您繼續努力！", "抽獎結果",
				JOptionPane.PLAIN_MESSAGE, imageIcon);
		return;
	}

	List<String> list = new ArrayList<String>();
	for (int i = 0; i < p.length; i++) {
		for (int j = 0; j < Integer.parseInt(n[i]); j++) {
			list.add(p[i]);
		}
	}
	// 打亂獎池數據
	int l = ran.nextInt(list.size());
	ImageIcon imageIcon = new ImageIcon("t/1.png");
	JOptionPane.showMessageDialog(frame, "恭喜您中了" + list.get(l) + "喲!!",
			"抽獎結果", JOptionPane.PLAIN_MESSAGE, imageIcon);

}

public static void main(String[] args) {
	// TODO Auto-generated method stub
	new jRandom();
}

}
程序界面如下：