package com.liuc;
public class AutoPackage {
public static void main(String[] args) {
long start=System.currentTimeMillis();
long sum = 0L;
for (int i = 0; i < Integer.MAX_VALUE; i++) {
sum += i;
}
long end=System.currentTimeMillis();
System.out.println((end-start)/1000);
}
}
运行时间19S
和下面这个程序package com.liuc;
public class AutoPackage {
public static void main(String[] args) {
long start=System.currentTimeMillis();
Long sum = 0L;
for (int i = 0; i < Integer.MAX_VALUE; i++) {
sum += i;
}
long end=System.currentTimeMillis();
System.out.println((end-start)/1000);
}
}
运行时间19S