解决Java多线程并发的计数器问题

import java.util.concurrent.atomic.AtomicInteger;

public class Counter {
	public static int count = 0;
	 
	static AtomicInteger atomic = new AtomicInteger(0);
    public synchronized static void inc() {
 
        //这里延迟1毫秒，使得结果明显
//        try {
//            Thread.sleep(1);
//        } catch (InterruptedException e) {
//        }
 
        count++;
    }
 
    public static void main(String[] args) {
 
    	for(int j=0;j<30;j++){
    		
    		//同时启动1000个线程，去进行i++计算，看看实际结果
    		
    		for (int i = 0; i < 1000; i++) {
    			new Thread(new Runnable() {
    				public void run() {
//    					Counter.inc();
    					atomic.incrementAndGet();
    				}
    			}).start();
    		}
    		
    		try {
    			Thread.sleep(100);
    		} catch (InterruptedException e) {
    		}
    		//这里每次运行的值都有可能不同,可能为1000
//    		System.out.println("运行结果:Counter.count=" + Counter.count);
    		System.out.println("运行结果:Counter.count=" + atomic.get());
    	}
    }
}