Java性能测试结果

import java.util.Date;
public class demo {
public static void main(String []args) {
int x=1;
//int total = 1000000;
long startTime = System.currentTimeMillis();
//int total = 10000000;
int total = 100000000;
int sum=0;
while( x < total ) {
sum=sum+x;
x++;
}
long endTime = System.currentTimeMillis();
System.out.println((endTime - startTime) + "ms");
}
}