package com.yx.zzg;

public class ThreadTest1 {

   private AtomicInteger j=new AtomicInteger();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.incrementAndGet();

        System.out.println(Thread.currentThread().getName() + "-inc:" + j);

    }

    private synchronized void dec() {

        j.decrementAndGet();

        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();

            }

        }

    }

}