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How to use java's join to block threads

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Release: 2023-04-26 12:28:07
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1. Description

belongs to the Thread class. The join method blocks the thread that calls this method. When trip a calls b.join(long) of thread b, thread a blocks until thread b completes.

2. Example

public class Demo {
    public static void main(String[] args) throws Exception {
       System.out.println("main start");
        Thread t1 = new Thread(() -> {
            System.out.println("t1 start");
            System.out.println("t1 end");
        });
        t1.start();
        t1.join();
        System.out.println("main end");
    }
}
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