Design Patterns and Best Practices in Java

Method addition in arrays

We have talked about streams and collections so far. There are a few additions to arrays as well:

• Mismatch: This tries to match two arrays and returns the index of the first element where the arrays mismatch. It returns -1 if both arrays are the same:

jshell> int[] arr1={1,2,3,4}arr1 ==> int[4] { 1, 2, 3, 4 }jshell> Arrays.mismatch(arr1, new int[]{1,2})$14 ==> 2jshell> Arrays.mismatch(arr1, new int[]{1,2,3,4})$15 ==> -1

We created an integer array. The first comparison shows that the array mismatched at index 2. The second comparison shows that both arrays are the same.

• Compare: This compares two arrays lexicographically. You can also specify start and end indexes, which is an optional argument:

jshell> int[] ...