Thread counter, Java

Thread counter

Language: Layout:

//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

import java.util.*;
import java.lang.*;

class Rextester
{  
    public static synchronized void main(String args[])
    {
        System.out.println("Hello, World!");
       
        CounterImpl c = new CounterImpl();
        System.out.println(c.get());
        c.inc();
        System.out.println(c.get());
        c.inc();
        c.inc();
        System.out.println(c.get());
       
        RunTest t0 = RunTest.getThread("0", c, Thread.MIN_PRIORITY);
        RunTest t1 = RunTest.getThread("1", c, Thread.MAX_PRIORITY);
        RunTest t2 = RunTest.getThread("2", c, Thread.NORM_PRIORITY);
        t1.sleeped(1000);
        try{
            //c.notifyAll();
            
            t0.join();
            t1.join();
            t2.join();
        }catch(InterruptedException e){
            System.out.println(e);
        }
    }

}

class RunTest extends Thread{
    private CounterImpl _counter;
    private String _name;
    private boolean _sleep;
    private int _sleepDuration;
    
    public void run(){
        test();
    }
    
    private void test(){
        for(int i=0; i<50; i++){
            _counter.inc();
            System.out.println(String.format("Thread: %s iteration: %s counter: %s", _name, i, _counter.get()));
            if(_sleep){
                _sleep = false;
                try{
                    System.out.println(String.format("Thread: %s sleeped by %s ...", _name, _sleepDuration));
                    Thread.sleep(_sleepDuration);
                    System.out.println(String.format("Thread: %s weakup ...", _name));
                }catch(InterruptedException e){
                    System.out.println(e);
                }
            }
        }
        System.out.println(String.format("Thread: %s is end!", _name));
    }
    
    public void sleeped(int duration){
        _sleep = true;
        _sleepDuration = duration;
    }
    
    
    public static RunTest getThread(String name, CounterImpl counter, int priority){
        RunTest th = new RunTest(name, counter);
        th.setPriority(priority);
        th.start();
        return th;
    }
    
    public static RunTest getThread(String name, int priority){
        return getThread(name, null, priority);
    }
    
    private RunTest(String name, CounterImpl counter){
        _name = name;
        _counter = counter;
    }
}

class CounterImpl implements Counter{
    private static int _counter;
    
    public synchronized int get(){return _counter;}
    public synchronized void inc(){_counter++;}
    
    CounterImpl(int startValue){
        _counter = startValue;
    }
    
    CounterImpl(){
    }
}

interface Counter{
    public int get();
    public void inc();
}

[ + ] Show input
Compilation time: 0.63 sec, absolute running time: 1.16 sec, cpu time: 0.55 sec, memory peak: 20 Mb, absolute service time: 1,79 sec

Hello, World! 0 1 3 Thread: 0 iteration: 0 counter: 5 Thread: 1 iteration: 0 counter: 5 Thread: 2 iteration: 0 counter: 6 Thread: 0 iteration: 1 counter: 7 Thread: 1 sleeped by 1000 ... Thread: 0 iteration: 2 counter: 9 Thread: 0 iteration: 3 counter: 10 Thread: 0 iteration: 4 counter: 11 Thread: 2 iteration: 1 counter: 8 Thread: 0 iteration: 5 counter: 12 Thread: 0 iteration: 6 counter: 14 Thread: 0 iteration: 7 counter: 15 Thread: 2 iteration: 2 counter: 13 Thread: 0 iteration: 8 counter: 16 Thread: 0 iteration: 9 counter: 18 Thread: 2 iteration: 3 counter: 17 Thread: 0 iteration: 10 counter: 19 Thread: 2 iteration: 4 counter: 20 Thread: 0 iteration: 11 counter: 21 Thread: 0 iteration: 12 counter: 23 Thread: 2 iteration: 5 counter: 22 Thread: 0 iteration: 13 counter: 24 Thread: 2 iteration: 6 counter: 25 Thread: 0 iteration: 14 counter: 26 Thread: 0 iteration: 15 counter: 28 Thread: 2 iteration: 7 counter: 27 Thread: 0 iteration: 16 counter: 29 Thread: 2 iteration: 8 counter: 30 Thread: 0 iteration: 17 counter: 31 Thread: 0 iteration: 18 counter: 33 Thread: 2 iteration: 9 counter: 32 Thread: 0 iteration: 19 counter: 34 Thread: 2 iteration: 10 counter: 35 Thread: 0 iteration: 20 counter: 36 Thread: 0 iteration: 21 counter: 38 Thread: 2 iteration: 11 counter: 37 Thread: 0 iteration: 22 counter: 39 Thread: 2 iteration: 12 counter: 40 Thread: 0 iteration: 23 counter: 41 Thread: 2 iteration: 13 counter: 42 Thread: 0 iteration: 24 counter: 43 Thread: 2 iteration: 14 counter: 44 Thread: 2 iteration: 15 counter: 46 Thread: 2 iteration: 16 counter: 47 Thread: 2 iteration: 17 counter: 48 Thread: 2 iteration: 18 counter: 49 Thread: 2 iteration: 19 counter: 50 Thread: 2 iteration: 20 counter: 51 Thread: 2 iteration: 21 counter: 52 Thread: 2 iteration: 22 counter: 53 Thread: 2 iteration: 23 counter: 54 Thread: 2 iteration: 24 counter: 55 Thread: 2 iteration: 25 counter: 56 Thread: 2 iteration: 26 counter: 57 Thread: 2 iteration: 27 counter: 58 Thread: 2 iteration: 28 counter: 59 Thread: 2 iteration: 29 counter: 60 Thread: 2 iteration: 30 counter: 61 Thread: 0 iteration: 25 counter: 45 Thread: 2 iteration: 31 counter: 62 Thread: 0 iteration: 26 counter: 63 Thread: 2 iteration: 32 counter: 64 Thread: 0 iteration: 27 counter: 65 Thread: 2 iteration: 33 counter: 66 Thread: 0 iteration: 28 counter: 67 Thread: 2 iteration: 34 counter: 68 Thread: 0 iteration: 29 counter: 69 Thread: 2 iteration: 35 counter: 70 Thread: 0 iteration: 30 counter: 71 Thread: 2 iteration: 36 counter: 72 Thread: 0 iteration: 31 counter: 73 Thread: 2 iteration: 37 counter: 74 Thread: 0 iteration: 32 counter: 75 Thread: 2 iteration: 38 counter: 76 Thread: 0 iteration: 33 counter: 77 Thread: 2 iteration: 39 counter: 78 Thread: 2 iteration: 40 counter: 80 Thread: 2 iteration: 41 counter: 81 Thread: 2 iteration: 42 counter: 82 Thread: 2 iteration: 43 counter: 83 Thread: 2 iteration: 44 counter: 84 Thread: 2 iteration: 45 counter: 85 Thread: 2 iteration: 46 counter: 86 Thread: 2 iteration: 47 counter: 87 Thread: 2 iteration: 48 counter: 88 Thread: 2 iteration: 49 counter: 89 Thread: 0 iteration: 34 counter: 79 Thread: 2 is end! Thread: 0 iteration: 35 counter: 90 Thread: 0 iteration: 36 counter: 91 Thread: 0 iteration: 37 counter: 92 Thread: 0 iteration: 38 counter: 93 Thread: 0 iteration: 39 counter: 94 Thread: 0 iteration: 40 counter: 95 Thread: 0 iteration: 41 counter: 96 Thread: 0 iteration: 42 counter: 97 Thread: 0 iteration: 43 counter: 98 Thread: 0 iteration: 44 counter: 99 Thread: 0 iteration: 45 counter: 100 Thread: 0 iteration: 46 counter: 101 Thread: 0 iteration: 47 counter: 102 Thread: 0 iteration: 48 counter: 103 Thread: 0 iteration: 49 counter: 104 Thread: 0 is end! Thread: 1 weakup ... Thread: 1 iteration: 1 counter: 105 Thread: 1 iteration: 2 counter: 106 Thread: 1 iteration: 3 counter: 107 Thread: 1 iteration: 4 counter: 108 Thread: 1 iteration: 5 counter: 109 Thread: 1 iteration: 6 counter: 110 Thread: 1 iteration: 7 counter: 111 Thread: 1 iteration: 8 counter: 112 Thread: 1 iteration: 9 counter: 113 Thread: 1 iteration: 10 counter: 114 Thread: 1 iteration: 11 counter: 115 Thread: 1 iteration: 12 counter: 116 Thread: 1 iteration: 13 counter: 117 Thread: 1 iteration: 14 counter: 118 Thread: 1 iteration: 15 counter: 119 Thread: 1 iteration: 16 counter: 120 Thread: 1 iteration: 17 counter: 121 Thread: 1 iteration: 18 counter: 122 Thread: 1 iteration: 19 counter: 123 Thread: 1 iteration: 20 counter: 124 Thread: 1 iteration: 21 counter: 125 Thread: 1 iteration: 22 counter: 126 Thread: 1 iteration: 23 counter: 127 Thread: 1 iteration: 24 counter: 128 Thread: 1 iteration: 25 counter: 129 Thread: 1 iteration: 26 counter: 130 Thread: 1 iteration: 27 counter: 131 Thread: 1 iteration: 28 counter: 132 Thread: 1 iteration: 29 counter: 133 Thread: 1 iteration: 30 counter: 134 Thread: 1 iteration: 31 counter: 135 Thread: 1 iteration: 32 counter: 136 Thread: 1 iteration: 33 counter: 137 Thread: 1 iteration: 34 counter: 138 Thread: 1 iteration: 35 counter: 139 Thread: 1 iteration: 36 counter: 140 Thread: 1 iteration: 37 counter: 141 Thread: 1 iteration: 38 counter: 142 Thread: 1 iteration: 39 counter: 143 Thread: 1 iteration: 40 counter: 144 Thread: 1 iteration: 41 counter: 145 Thread: 1 iteration: 42 counter: 146 Thread: 1 iteration: 43 counter: 147 Thread: 1 iteration: 44 counter: 148 Thread: 1 iteration: 45 counter: 149 Thread: 1 iteration: 46 counter: 150 Thread: 1 iteration: 47 counter: 151 Thread: 1 iteration: 48 counter: 152 Thread: 1 iteration: 49 counter: 153 Thread: 1 is end!