Daemon Thread

public class Solution {
    public static void main(String[] args) throws InterruptedException {
        Thread target = new Thread();
        LoggingStateThread loggingStateThread = new LoggingStateThread(target);

        loggingStateThread.start(); // NEW
        Thread.sleep(100);
        target.start();  // RUNNABLE
        Thread.sleep(100);
        // TERMINATED
    }
}

public class LoggingStateThread extends Thread{

    Thread thread;

    LoggingStateThread(Thread thread){
        this.thread = thread;
        this.setDaemon(true);
    }

    @Override
    public void run() {
        System.out.println(thread.getState());
        Thread.State pastState = thread.getState();
        super.run();
        while (!thread.getState().equals(State.TERMINATED)){
                State state = thread.getState();
            if (!state.equals(pastState)){
                System.out.println(state);
                pastState = state;
            }
        }
        System.out.println(thread.getState());
    }
}