Java:测试自动转型和强制转型

代码:

public class TestCast {
public static void main(String[] args){


int money = 1000000000;  //10亿
int years = 20;
long total = (long)money*years;   //返回的是负数
System.out.println(total);
//一个人70年心跳多少次
long times = 70L*60*24*365*70;
System.out.println(times);
} 
}