[مخالف - عنوان غير مناسب :]بعض المثود الغير مفهومة

السلام عليكم

هناك بعض الفنكشن التي لم افهم ما مبدأ عملها

هي مثود الـ run

public class ArrayWriter implements Runnable{

   public final SimpleArray SharedSimpleArray;
   private final int StartValue;

    public ArrayWriter(int Value, SimpleArray array){
       StartValue = Value;
       SharedSimpleArray = array;
       }// end constructor//With constructor we need to do ovarraid for run methodv

    public void run(){
        for(int i = StartValue; i <StartValue+3; i++ )
        {
            SharedSimpleArray.add(i);// add an element to the shared array

        }//end for
    }//end run
}// end class ArrayWriter

هذه كلاس اخرى قد بني منها الاوبجكت

public class SimpleArray { // not thread Safe

    private final int array[]; // the shared int array
    private int WritIndex = 0;
    private final Random generator = new Random();

    public SimpleArray (int size){
        array = new int [size];
    }// end constructor

    public void add (int value)
    {
        int position = WritIndex;
        try{// put thread to sleep
            Thread.sleep(generator.nextInt(5000));
        }// end try
          catch (InterruptedException ex){
            System.out.println("Interrupted");
        }//end catch

        array [position] = value;
        System.out.printf
                ("%s wrote %2d to element %d \n ", Thread.currentThread().getName(),value,position);
        // name of pool thread , name of thread in the pool
        // %2d locatin of thread (1,2,3 11,12, 13)
        ++ WritIndex; //(increas position)

        System.out.printf("Next writeindex : %d\n",WritIndex);
    }// end add

    public String toString(){

    String arrayString = "\n contents of simple array:\n";
    for (int i = 0 ; i < array.length ; i++)
    arrayString += array+ " " ;
    return arrayString;
    }// end to string

}// end class

وهذه المين كلاس

public class SharedArrayTest {
     public static void main (String []arg){
         //construct the shared object
         SimpleArray SharedSimpleArray = new SimpleArray(6);
         ArrayWriter Writer1 = new ArrayWriter(1, SharedSimpleArray);
         ArrayWriter Writer2 = new ArrayWriter(11,SharedSimpleArray);

         ExecutorService executer =  Executors.newCachedThreadPool();

         executer.execute(Writer1);
         executer.execute(Writer2);
         executer.shutdown();

         try{// wait l minute for booth writes to finish executing
             boolean tasksEnded = executer.awaitTermination(1, TimeUnit.MINUTES);
             // blocks until all tasks have completed execution after shutdown or time out occurs
             // or the current thread is interrupted

             if (tasksEnded)
                 System.out.println(SharedSimpleArray);
             else
                 System.out.println("Time out for tasks to finish");
         }//end try
         catch(InterruptedException e){
             System.out.println("Interruption");
         }// end catch
    }//end main
}// end class