Demo5.java

public class Demo05 {
    public static void main(String[] args) {
        //操作比较大的数的时候，注意溢出问题
        //JDK7新特性，数字之间可以用下划线分割
        int money = 10_0000_0000;
        int years = 20;
        int total = money*years;
        long total1 =  money*years;//默认是int，转换之前已经存在问题

        long total2 = money*((long)years);//先把一个数转换为long
        System.out.println(total2);
    }
}

标签：java,int,money,long,years,total2,Demo5,public
来源： https://www.cnblogs.com/bcjx99/p/15317577.html