public class ThreadTest1{ |
private int j; |
public static void main(String args[]){ |
ThreadTest1 tt= new ThreadTest1(); |
Inc inc=tt. new Inc(); |
Dec dec=tt. new Dec(); |
for ( int i= 0 ;i< 2 ;i++){ |
Thread t= new Thread(inc); |
t.start(); |
t= new Thread(dec); |
t.start(); |
} |
} |
private synchronized void inc(){ |
j++; |
System.out.println(Thread.currentThread().getName()+ "-inc:" +j); |
} |
private synchronized void dec(){ |
j--; |
System.out.println(Thread.currentThread().getName()+ "-dec:" +j); |
} |
class Inc implements Runnable{ |
public void run(){ |
for ( int i= 0 ;i< 100 ;i++){ |
inc(); |
} |
} |
} |
class Dec implements Runnable{ |
public void run(){ |
for ( int i= 0 ;i< 100 ;i++){ |
dec(); |
} |
} |
} |
} |