JAva awtランダム選択を実現

友达が授业を选んで难しいことを犯したので、私はあなたにくじを引くプログラムを书いたほうがいいと言って、天意を见て、いいですよ.そこで、やると言ったらやります.以下はソースコードです.参考にしてください.

public class SelectClass extends JFrame {
	private static final long serialVersionUID = 1L;
	JPanel pn1 = null;
	JPanel pn2;
	JPanel pn3;
	JTextArea tf = null;
	JLabel msg = null;
	JButton btn1;
	JButton btn2;
	JButton btn3;
	boolean flag = true;

	//      ，     
	public SelectClass() {
		tf = new JTextArea(2, 40);
		pn1 = new JPanel();
		//        
		pn1.add(tf);
		this.add(pn1, BorderLayout.NORTH);
		msg = new JLabel("     ！");
		msg.setForeground(Color.red);
		msg.setFont(new Font("  ", Font.PLAIN, 80));
		pn2 = new JPanel();
		pn2.add(msg);
		//        
		this.add(pn2, BorderLayout.CENTER);
		//        
		btn1 = new JButton("  ");
		btn3 = new JButton("  ");
		//          
		btn1.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				/*
				 *          ，          ，   flag     chouJiang(),           。
				 */
				class ThreadStart extends Thread {
					@Override
					public void run() {
						//           
						flag = true;
						chouJiang();
					}
				}

				//            ，   ，    
				new ThreadStart().start();
			}

		});

		btn2 = new JButton("  ");

		//            
		btn2.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				//             ，        
				class ThreadStop extends Thread {
					@Override
					public void run() {
						flag = false;
					}
				}
				//           
				new ThreadStop().start();
			}

		});
		btn3.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				chouJiang2();
			}
		});

		pn3 = new JPanel();
		pn3.add(btn1);
		pn3.add(btn2);
		pn3.add(btn3);
		this.add(pn3, BorderLayout.SOUTH);

		//        
		this.setTitle("    ===>");
		this.setIconImage(getIconImage());
		this.setSize(500, 300);
		this.setLocation(500, 280);
		// JFrame       ，      ，          
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
	}

	//          ，          
	public void chouJiang() {
		String text = ""; //        
		int i = 0;
		String[] arr = { "   （      ）", "  ", "   ", "    （    ）", "      ", "    ", "    （        ）", "      ",
				"      ", "        ", "    ", "   ", "       ", "    " };
		while (flag) {
			text = "";
			i = (int) Math.floor(Math.random() * arr.length + 1) - 1;
			System.out.println(i);
			text = arr[i];
			try {
				Thread.sleep(35);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			//        
			tf.setText(text);
			tf.setFont(new Font("  ", Font.PLAIN, 20));
		}
	}

	@SuppressWarnings({ "rawtypes", "unchecked" })
	public  void chouJiang2() {
		String[] arr = { "   （      ）", "  ", "   ", "    （    ）", "      ", "    ", "    （        ）", "      ",
				"      ", "        ", "    ", "   ", "       ", "    " };
		TreeMap map = new TreeMap();// key      ，value           
		String text = "";
		for (int i = 0; i < 100000; i++) {
			System.out.println("---" + i);
			text = "";
			int j = (int) Math.floor(Math.random() * arr.length + 1) - 1;
			text = arr[j];
			//          ，key       ，value   1
			if (map.get(text) == null) {
				map.put(text, new Integer(1));
				//   ，      ，key       ，  value            。
			} else {
				int value = ((Integer) (map.get(text))).intValue();
				map.put(text, new Integer(value + 1));
			}
		}
		Collection c = map.values();
		Iterator extends Integer> i = (Iterator extends Integer>) c.iterator();
		Integer candidate = i.next();
		while (i.hasNext()) {
			Integer next = i.next();
			if (next.compareTo(candidate) > 0)
				candidate = next;
		}
		int max = candidate;//              
		System.out.println("--------" + max);
		ArrayList list = new ArrayList();//            
		Set set = map.entrySet();
		//            
		for (Iterator it = set.iterator(); it.hasNext();) {
			Map.Entry entry = (Map.Entry) it.next();
			String key = entry.getKey().toString();
			int value = ((Integer) entry.getValue()).intValue();
			if (value == max) {
				list.add(key);
			}
			System.out.println(key + " appeared " + value + " times");
		}
		System.out.println(list);
		//        
		tf.setText("            100000 " + "
" + "        " + list.get(0) + "， " + max + " ");
		tf.setFont(new Font("  ", Font.PLAIN, 16));
	}

	public static void main(String[] args) {
		new SelectClass();
	}
}