currenttimemillistest.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 36 行

/*
 * $Id: CurrentTimeMillisTest.java,v 1.1 2003/11/25 11:41:41 epr Exp $
 */
package org.jnode.test;

/**
 * @author epr
 */
public class CurrentTimeMillisTest {

	public static void main(String[] args) {
		
		System.out.println("Testing System.currentTimeMillis please wait");
		
		for (int i = 0; i < 1000; i++) {
			final long start = System.currentTimeMillis();
			
			final long end = System.currentTimeMillis();
			
			int count = 0;
			for (int j = 0; j < 50000; j++) {
				count += j;
			}
			
			final long diff = end-start;
			
			if (diff < 0) {
				System.out.println("Oops currentTimeMillis goes back in time " + diff + "ms");
			}
			
		}
		
		System.out.println("done");
	}
}