public class p10 {
public static void main(String[] args) {
long start_Time = 0,end_Time = 0;
int i = 0;
//计算循环使用的时间
start_Time = System.currentTimeMillis(); //从1970-1-1到现在的毫秒
//死循环
while(true) {
if(i == Integer.MAX_VALUE) {
break;
}
i++;
}
end_Time = System.currentTimeMillis();
System.out.println("while循环结束," + i);
System.out.printf("循环使用时间是: %d 毫秒\n",(end_Time - start_Time));
start_Time = System.currentTimeMillis();
int j = 0;
for (; j < Integer.MAX_VALUE; j++) {
if(j==Integer.MAX_VALUE) {
break;
}
}
end_Time = System.currentTimeMillis();
System.out.println("for循环结束," + j);
System.out.printf("循环使用时间是: %d 毫秒\n",(end_Time - start_Time));
}
}
java计算循环使用时间
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转载自blog.csdn.net/qq_43314793/article/details/90107004
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