多线程小例子

package com.test;

import java.io.File;
import junit.framework.TestCase;

public class TestThread extends TestCase {
	protected void setUp() throws Exception {
		super.setUp();
	}

	public void testThread() throws Exception {
		for (int i = 0; i < 5; i++) {
			new Thread(new MyThread(i + 1)).start();
		}
	}

	public class MyThread implements Runnable {
		int count = 1, number;

		public MyThread(int num) {
			number = num;
			System.out.println("创建线程 " + number);

		}

		public void run() {
			while (true) {
				System.out.println("线程 " + number + ":计数 " + count);
				try {
					File file = new File("D:\\" + count + ".txt");
					if (!file.exists()) {
						file.createNewFile();
						System.out.println("D:\\" + count + ".txt 创建成功");
					}
				} catch (Exception e) {
					e.printStackTrace();
				}
				if (++count == 6)
					return;
			}
		}

	}

}