Question: Write a Java program. Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Note: For the purpose of

Write a Java program. Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.

Note: For the purpose of this problem, we define empty string as valid palindrome.

Example 1:

Input: "A man, a plan, a canal: Panama" Output: true

Example 2:

Input: "race a car" Output: false

Program must be recursive. JAVA

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