t.join(1000);  //等待 t 執行緒，等待時間是1000毫秒

測試demo:

public class MainClass {
	
	public static void main(String[] args){
		System.out.println("main aaaaaaaaa---"+ System.currentTimeMillis());
		Worker work = new Worker();
		work.start();
		try {
			work.join(3000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			System.out.println("main interrupt---"+ System.currentTimeMillis());
			work.interrupt();
			Thread.currentThread().interrupt();
		}
		System.out.println("main bbbbbbbbbbb---"+ System.currentTimeMillis());
	}
	
	private static class Worker extends Thread {
 
        private Worker() {
        }
 
        public void run() {
            System.out.println("thread 11111---"+ System.currentTimeMillis());
            try {
				Thread.sleep(5000);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
            System.out.println("thread 22222---"+ System.currentTimeMillis());
        }
    }

}
 

main aaaaaaaaa---1476845820078
thread 11111---1476845820079
main bbbbbbbbbbb---1476845823079
thread 22222---1476845825079

參考連結：