public class Test extends Thread {
	private int startingNumber = 0;

	// 设置开始计数值
	public Test(int startingNumber) {
		this.startingNumber = startingNumber;
	}

	public void run() {
		// 循环50次
		for (int i = startingNumber; i < (startingNumber + 50); i++) {
			System.out.println(i);
			try {
				sleep((long) (Math.random() * 600)); // 睡眠时间随机
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	public static void main(String args[]) throws Exception {
		Test t1 = new Test(1000), t2 = new Test(2000), t3 = new Test(3000);
		t1.start();
		t2.start();
		t3.start();
	}
}