This program in Java creates a list of 15 numbers and creates 3 threads to search for the maximum in a given interval. I want to create another thread that takes those 3 numbers and get the maximum. but i don't know how to get those values in the other thread.

public class apple implements Runnable{

String name;
int time, number, first, last, maximum;
int[] array = {12, 32, 54 ,64, 656, 756, 765 ,43, 34, 54,5 ,45 ,6 , 5, 65};


public apple(String s, int f, int l){
    name = s;
    first = f;
    last = l;
    maximum = array[0];
}



public void run(){
    try{

        for(int i = first; i < last; i++ )
        {

            if(maximum < array[i])
            {
                maximum = array[i];
            }
        }

        System.out.println("Thread"+ name + "maximum = " + maximum);

    }catch(Exception e){}
    }



public static void main(String[] args){
    Thread t1 = new Thread(new apple("1 ", 0, 5));
    Thread t2 = new Thread(new apple("2 ", 5, 10 ));
    Thread t3 = new Thread(new apple("3 ", 10, 15));

    try{

        t1.start();
        t2.start();
        t3.start();
        }catch(Exception e){}

}

}