问题描述
限时送ChatGPT账号..我正在编写一个程序来查找素数.我将质数和所有正整数(现在到 100)存储在两个 ArrayList
中.代码如下:
I'm making a program to find prime numbers. I'm storing the prime numbers and all positive integers (right now till 100) in two ArrayList<Integer>
. Here's the code:
import java.util.ArrayList;
public class PrimeNumbers {
static ArrayList<Integer> num = new ArrayList<Integer>();
static ArrayList<Integer> prime = new ArrayList<Integer>();
public static void main(String[] args) {
prime.add(2);
prime.add(3);
prime.add(5);
for (int z = 1; z<=100; z++){
num.add(z);
}
outer: for (int a = 1; a <=num.size(); a++){
inner: for (int b = 1; b <=prime.size(); b++){
if (num.get(a)%prime.get(b) != 0){//line 14
if (prime.indexOf(b)+1 == prime.size()){
prime.add(a);
continue outer;
}
else
continue inner;
}
else
continue outer;
}
}
System.out.println(prime);
}
}
但是当我运行程序时,出现了这些错误:
But when I run the program, these errors show up:
线程main"中的异常java.lang.IndexOutOfBoundsException:索引:3,大小:3在 java.util.ArrayList.rangeCheck(ArrayList.java:653)在 java.util.ArrayList.get(ArrayList.java:429)在 PrimeNumbers.main(PrimeNumbers.java:14)
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 3, Size: 3 at java.util.ArrayList.rangeCheck(ArrayList.java:653) at java.util.ArrayList.get(ArrayList.java:429) at PrimeNumbers.main(PrimeNumbers.java:14)
出了什么问题?
推荐答案
列表索引从 0 运行到 size()-1
,但是你是从 1 循环到 size()代码>.
List indices run from 0 to size()-1
, but you are looping from 1 to size()
.
这篇关于ArrayList:IndexOutOfBounds 异常问题的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
更多推荐
[db:关键词]
发布评论