Multithreading --Runnable Interface

In a manner Runable interface to create a thread has a big advantage over inheritance Thread class, because the class is not multiple inheritance, that is, a class can only inherit a class, if the class has inherited a class, can not be achieved multithreading , but it can be achieved through a multi-threaded manner Runable interface.

1, Runnable multi-threaded

package pers.zhb.runnable;

public class MyThread implements Runnable{

    public void run() {
        for (int i = 0; i < 20; i++) {
            System.out.println(Thread.currentThread().getName()+"：正在执行！"+i);
        }
        
    }

}

pers.zhb.runnable Package; 

public  class RunnableDemo {
 public  static  void main (String [] args) { 
    the MyThread MT = new new the MyThread (); 
    Thread T2 = new new Thread (MT); // also essentially Thread class implements Runnable interface , but the method is empty Run 
    t2.start (); 
    for ( int I = 0 ; I < 20 is ; I ++ ) { 
        the System. OUT .println ( " main function thread! " + I); 
    } 
    . the System OUT .println ( " the main function execution is over .");
    
}
}

2, using the join () method

The main thread starts running after the end of the child thread running.

package pers.zhb.runnable;

public class MyThread implements Runnable{

    public void run() {
        for (int i = 0; i < 20; i++) {
            System.out.println(Thread.currentThread().getName()+"：正在执行！"+i);
        }
        
    }

}

package pers.zhb.runnable;

public class RunnableDemo {
    public static void main(String[] args) throws InterruptedException {
        MyThread mt = new MyThread();
        Thread t1 = new Thread(mt);

        t1.start();

        t1.join();

        for (int i = 0; i < 20; i++) {
            System.out.println("主函数线程！" + i);
        }

        System.out.println(" The main function performed ended " ); 

    } 
}