import java.util.Scanner;
import java.util.Random;
public class a{
public static void main(String[] args){
System.out.println("抢红包");
System.out.println("请输入红包金额");
Scanner in=new Scanner(System.in);
double total=in.nextDouble();
System.out.println("请输入红包个数");
int num=in.nextInt();
double min=0.01;
while(total/num<min){
System.out.println("输入的金额太小不够分请重新输入红包金额");
total=in.nextDouble();
System.out.println("请输入红包个数");
num=in.nextInt();
}
if(total/num==min){
for(int i=1;i<=num;i++){
System.out.println("第"+i+"个红包是0.01元");
}
}
else
{Random x=new Random();
for(int i=1;i<num;i++ ){
if(total/num==min){
System.out.println("第"+i+"个红包是0.01元");
total=total-0.01;
continue;
}
double max=total-(num-i)*min;
double b=max-min;
double now=(double)x.nextInt((int)(b*100))/100;
double money=now+min;
System.out.println("第"+i+"次红包是 "+String.format("%.2f",money)+"元");
total=total-money;
}
System.out.println("第"+num+"次红包是 "+String.format("%.2f",total)+"元");
in.close();
}
}
}
Exception in thread "main" java.lang.IllegalArgumentException: bound must be pos
itive
at java.util.Random.nextInt(Random.java:388)
at a.main(a.java:37)
当输入1元金额,红包个数为99或98的时候会报异常请大神指点一下原因是什么