import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.Arrays;
import java.util.Timer;
import java.util.TimerTask;

public class Monitor implements Runnable {
    @Override
    public void run() {
        ThreadMXBean threadMX = ManagementFactory.getThreadMXBean();
        ThreadInfo[] threadInfo = threadMX.getThreadInfo(threadMX.getAllThreadIds() );
        Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                System.out.print("\033[H\033[2J");
                System.out.flush();
                Arrays.stream(threadInfo).forEach(info->
                        System.out.println("ID: "+info.getThreadId()+" Name: "+ info.getThreadName()+" Status: "+info.getThreadState())
                );

                System.out.println("\n----------------------------------------------------------------------------\n");
            }
        },0,2000);
    }
}

//--------------------------------------------------------------------------------------

import java.util.Random;
import java.util.Timer;

public class MyRunnable implements Runnable {
    @Override
    public void run() {
        int j = 0;

        while (true){
            Random rand = new Random();
            long startTime = System.currentTimeMillis();
            while (System.currentTimeMillis()< startTime+3000){
               j++;
            }
            try{
                int randTime = 100000;
                Thread.sleep(randTime);
            }catch (InterruptedException ie) {
                ie.printStackTrace();
                Thread.currentThread().interrupt();
            }

        }
    }
}

//---------------------------------------------------------------------

import java.util.Random;

public class Main {

    public static void main(String[] args) {
        Random rnd = new Random();
        for (int i=0;i<rnd.nextInt(5)+2;i++){
            new Thread(new MyRunnable(),"\u001B[31m"+"Thread"+i+"\u001B[0m").start();
        }
        Thread monitorThread =  new Thread(new Monitor());
        monitorThread.start();
    }
}