Question

I have a code in abstract class:

public abstract class Job implements Runnable{  
    public void start(Integer jobId) {                      
        try {
            new Thread(this).start();
        } catch (Exception e) {
            e.getMessage();
        }       
    }
}

class code:

public class Test extends Job {

    @Override
    public void run() {
        for(int i = 0; i < 5; i++) {
            try {
                Thread.currentThread();
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("TEST");
        }       
    }
}

And in main I have:

public static void main (String[] args) throws MessagingException  
  {
      Test test = new Test();
      test.start(74); 
  }

So how can I pass parameter (jobId) from start method to run()?

Answer 1

In the Job.start() method, store the value in a member variable, so that you can access it in the run() method later, when the thread is started.

public abstract class Job implements Runnable {
    protected Integer jobId;

    public void start(Integer jobId) {
        this.jobId = jobId;
        try {
            new Thread(this).start();
        } catch (Exception e) {
            e.getMessage();
        }       
    }
}

public class Test extends Job {
    @Override
    public void run() {
        System.out.println(jobId);
    }
}