java 中记录时间

public class QuN{
	public static void main(String[] strs){
		long startTime = System.currentTimeMillis();
		int i = 0;
		while(i<1000000){
			i++;
		}
		long endTime = System.currentTimeMillis();
		System.out.println("消耗时间为："+(endTime - startTime));
	}
}