Java Thread Snf

package com.app.thread;import java.util.ArrayList;import java.util.Arrays;import java.util.List;public class Main{    public static void main(String[] args){        List<Integer> v = new ArrayList<>(Arrays.asList(1, 2, 3,4));        ThreadExample thread1 = new ThreadExample(v);        ThreadExample thread2 = new ThreadExample(v);        try {            thread1.start();            thread1.join(); // thread2 alabilmek iin bekleyecektir.            thread2.start();            thread2.join(); // main thread alabilmek iin bekleyecektir.           // start yerine run kullanlrsa,            // main thread 2 numaral thread'i beklemeyecek            // bylece thread2.join() satrna ihtiya duyulmayacaktr.         }catch (InterruptedException e) {            System.out.println(e.getMessage());        }        Integer totalSum = thread1.getSum() + thread2.getSum();        System.out.println(Thread.currentThread().getName() + " => The sum: " + totalSum);    }}

package com.app.thread;import java.util.List;public class ThreadExample extends Thread implements Runnable{    private List<Integer> v;    public Integer sum = 0;    public ThreadExample(List<Integer> p) {        this.v = p;    }    @Override    public void run() {        System.out.println(Thread.currentThread().getName() + " started..");        synchronized(this) {            for (Integer i : v) {                sum += i;            }            System.out.println(Thread.currentThread().getName() + " => The sum: " + totalSum);        }    }    public Integer getSum() {        return sum;    }}