三个For优化方案 JavaJ#

http://www.iteye.com/topic/762637
http://www.iteye.com/topic/762312
http://www.iteye.com/topic/632481
这三个贴子说的同一件事.....

package com.maodaju.tools.effection;

public class TestFFF {
	public static void main(String[] args) {
		long start = System.currentTimeMillis();
		for (int i = 0; i < 10000; i++) {
			for (int j = 0; j < 1000; j++) {
				for (int k = 0; k < 100; k++) {
					int t = i*j*k;
				}
			}
		}
		
		
		
		long end = System.currentTimeMillis();
		System.out.println(end-start);
	}
}

java -server TestFFF
用时16
java TestFFF
用时1537
效率100比1吧