Java Code: A thread waits for another thread to finish before continuing

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I am creating a program wherein I have 2 threads.
Thread A performs something and sends to Thread B the result.
Thread A waits for response from Thread B before processing another task.

How can I do this?
Can anyone give me a sample code?
thanks!

Posted 6-Aug-13 19:35pm

dinahgee1419

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TrushnaK · Answer 1 · 2013-08-06T20:05:00

Solution 1

If you want to wait for the previous thread to finish, before you start the next, you add thread.join() in between:

for eg:-

C#

for(int i = 0; i < 10; i++) {
    thread = new Thread(this);
    thread.start();

    thread.join();    // Wait for it to finish.
}

Posted 6-Aug-13 20:05pm

TrushnaK

ridoy · Answer 2 · 2013-08-06T20:34:00

You have to assign your thread to a variable and later call join() on this variable like:

Java

Thread t = new Thread() {
    public void run() {
        System.out.println("text");
        // other complex code
    }
 };
 t.start();
 t.join();

This way you will wait until the thread finishes and just then continue.

Java Code: A thread waits for another thread to finish before continuing

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Java Code: A thread waits for another thread to finish before continuing

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