如何在一个java文件中调用两个run方法

Question

below is the code where i need to invoke 2 run methods for 2 different threads any way this can be done. please help on this.

public class QuestionList extends ListActivity implements Runnable {
                //This below thread will call the run method
        Thread thread = new Thread(QuestionList.this);
            thread.start();

         //can i have one more thread which call run1() method any idea

}


public void run() {


}

Answer 1

You cannot have two run() methods of course, and I suggest not using the same for both Thread s (with a of if() statement to determine which behaviour to apply).

Instead you should create two distinct classes (why not inner classes) to implement these distinct behaviours. Something like:

public class QuestionList extends ListActivity {
    class BehaviourA implements Runnable {
        public void run() {
        }
    }

    class BehaviourB implements Runnable {
        public void run() {
        }
    }

    private void somewhereElseInTheCode() {
        BehaviourA anInstanceOfBehaviourA = new BehaviourA();
        Thread threadA = new Thread(anInstanceOfBehaviourA);
        threadA.start();

        BehaviourB anInstanceOfBehaviourB = new BehaviourB();
        Thread threadB = new Thread(anInstanceOfBehaviourB);
        threadB.start();
    }
}    

The good thing with inner classes is that they can access to the members of QuestionList , and this seems to be what you are willing to do.

Answer 2

    public class QuestionList extends ListActivity {
                    //This below thread will call the run method
            Thread1 thread1 = new Thread(this);
            thread1.start();

            Thread2 thread2 = new Thread(this);
            thread2.start();


    }

    class Thread1 implements Runnable
    {
       public void run() {


       } 
    }

   class Thread2 implements Runnable
   {
       public void run() {


       } 
   }