ArrayIndexOutOfBoundsException while Iterating List in Java

In this Example we are going to change the Array into List and iterate the list.

Error Message :

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 5 out of bounds for length 5

       at java.base/java.util.Arrays$ArrayList.get(Arrays.java:4372)

       at com.src.SumofSquares.main(SumofSquares.java:14)

Error Description :

package com.src;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Comparator;

import java.util.List;

public class SumofSquares {

       public static void main(String[] args) {

              int total = 0;

              List<Integer> arr =  Arrays.asList(1,2,3,4,0);

              for(int i=7;i<=arr.size();i++) {

                     System.out.println(arr.get(i));

              }

       }

}

In the above program we get an error in the below code.

for(int i=7;i<=arr.size();i++), while iterating the iteration value (i) is more than the array Index size.so we will get ArrayIndexOutOfBound Exception.

Solution:

Instead of i<= arr.size() this we can use i< arr.size().

package com.src;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Comparator;

import java.util.List;

public class SumofSquares {

public static void main(String[] args) {

int total = 0;

List<Integer> arr =  Arrays.asList(1,2,3,4,0);

for(int i=0;i<arr.size();i++) {

System.out.println(arr.get(i));

}

}

}

Output:

1

2

3

4

0