public boolean outerMethod()
{
    boolean success= performTask();

    if( success == false )
    {
        return false;
    }

   // more processing here if success == true
}

public void run()
{
    boolean success = performTask();

    if( success == false )
    {
        /* here is where I want to exit this thread */
    }

    // further processing if success == true
}