Java join thread control usage, Java join thread usage

Java join thread control usage, Java join thread usage

JDK description:

Join
Public final void join ()
Throws InterruptedException waits for the thread to terminate.

Throw:
InterruptedException-if any thread breaks the current thread. When this exception is thrown, the interruption status of the current thread is cleared.
Test code:

Copy codeThe Code is as follows:
Public class MyThread extends Thread {

Public static void main (String [] args) throws InterruptedException {
A a = new ();
B B = new B ();
A. start ();
A. join ();
B. start ();

}
}
Class A extends Thread {

Public void run (){
For (int I = 0; I <10000; I ++ ){
System. out. print ("A" + I );
}
}
}

Class B extends Thread {

Public void run (){
For (int I = 0; I <10000; I ++ ){
System. out. print ("B" + I );
}
}
}

It can be seen that thread B starts execution only after thread A finishes execution.

Is it clear?