Java Thread join() Method Guide

In Java, the join() method is a method of the Thread class, used to wait for a thread to finish before continuing execution. Here is how it is used:

1. Create a thread object and call the start() method to begin the thread:

Thread thread = new Thread(new Runnable() {
    @Override
    public void run() {
        // 线程执行的代码
    }
});
thread.start();

1. Call the join() method where the thread needs to wait for its execution to finish.

thread.join();

After calling the join() method, the current thread will wait for the thread to finish executing before continuing. If the thread has already finished executing, the join() method will return immediately.

It is important to note that the join() method may throw an InterruptedException, so proper exception handling is required.

try {
    thread.join();
} catch (InterruptedException e) {
    e.printStackTrace();
}