java synchronization threads test

java_sync_thread_test.java

class Counter {
   int val
    public Counter() { val = 0; }
    public /* synchronized */ void  increment() { 
        val++ 
    }
}

def c = new Counter()

class MyRunnable implements Runnable {

   def cntr
   public MyRunnable(cntr) {
     this.cntr = cntr
   }
   
   public void run() {
     cntr.increment()
   }
}

def threads = []
for (e in 0..1000) {
   threads << new Thread(new MyRunnable(c))
}

threads.each { it.start() }
threads.each { it.join() }
println 'done ' + c.val