public class HeavyWorkRunnable implements Runnable {

    @Override
    public void run() {
        System.out.println("Doing heavy processing - START "+Thread.currentThread().getName());
        try {
            doDBProcessing();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("Doing heavy processing - END "+Thread.currentThread().getName());
    }

    private void doDBProcessing() throws InterruptedException {
     //   TODO
    }
}

public class ThreadRunExample {
     public static void main(String[] args){

            Thread t1 = new Thread(new HeavyWorkRunnable(), "t1");
            Thread t2 = new Thread(new HeavyWorkRunnable(), "t2");
            System.out.println("Starting Runnable threads");

            t1.start();
            t2.start();
            System.out.println("Doing main heavy processing - START "+Thread.currentThread().getName());
            System.out.println("Runnable Threads has been started");
        }
}