Wait until child threads completed : Java

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You can do:

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. You can join multiple threads:

for (Thread thread : threads) {
  thread.join();
}

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