Let’s say We have thread T1, T2, and T3, how will you ensure that thread T2 run after T1 and thread T3 run after T2?

By | March 6, 2023

One way to ensure that thread T2 runs after T1 and thread T3 runs after T2 in Java is to use the join() method. Here’s an example:

Thread t1 = new Thread(() -> {

    // Code for thread T1

});

Thread t2 = new Thread(() -> {

    try {

        t1.join(); // Wait for T1 to complete

    } catch (InterruptedException e) {

        e.printStackTrace();

    }

    // Code for thread T2

});

Thread t3 = new Thread(() -> {

    try {

        t2.join(); // Wait for T2 to complete

    } catch (InterruptedException e) {

        e.printStackTrace();

    }

    // Code for thread T3

});

 

t1.start();

t2.start();

t3.start();

In this example, we create three threads t1, t2, and t3. We start the threads in the order t1, t2, and t3. In thread t2, we call the join() method on thread t1, which blocks the thread t2 until thread t1 completes. Similarly, in thread t3, we call the join() method on thread t2, which blocks the thread t3 until thread t2 completes. This ensures that thread t2 runs after thread t1 and thread t3 runs after thread t2.

 

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