How to return value from thread (java)

Question

I made a thread like this one bellow:

public class MyThread implements Runnable {
  private int temp;

  public MyThread(int temp){
     this.temp=temp;
  }
         


        

Answer 1

You can try these code. By using Future you can hold the value return when the thread end:

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

/**
 * @author mike
 * @date Sep 19, 2014
 * @description
 */
public class Calc {
    private static class MyCallable implements Callable {
        private int temp = 0;

        public MyCallable(int temp) {
            this.temp = temp;
        }

        @Override
        public Integer call() {
            temp += 10;
            return temp;
        }
    }

    public static void main(String[] args) {
        MyCallable foo = new MyCallable(10);
        try {
            Future result = Executors.newCachedThreadPool().submit(foo);
            System.out.println(result.get());
        } catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        }
    }
}