Check if Palindrome
Write a method that checks if a string is a palindrome (reads the same forwards and backwards). The method should ignore case and spaces when determining if a string is a palindrome. Return false for null or empty strings.
A palindrome is a word, phrase, or sequence that reads the same backward as forward. For example, "racecar" is a palindrome, and "A man a plan a canal Panama" is also a palindrome when ignoring spaces and case.
Method Signature
public static Boolean isPalindrome(String text)
Examples:
Input: text = "racecar"
Output: true
Explanation: "racecar" reads the same forwards and backwards
Input: text = "A man a plan a canal Panama"
Output: true
Explanation: Ignoring spaces and case, this reads the same forwards and backwards
Input: text = "hello"
Output: false
Explanation: "hello" reversed is "olleh", which is not the same
Input: text = null
Output: false
Explanation: Null strings are not considered palindromes
Input: text = ""
Output: false
Explanation: Empty strings are not considered palindromes
Input: text = "Racecar"
Output: true
Explanation: Case is ignored, so this is a palindrome
Apex Code Editor
Welcome to Lightning Challenge!
Create an Account
Sign up to track your progress, earn points, and compete with others. Your solutions will be saved automatically.
Create accountHow It Works
- • Write your solution in the code editor
- • Connect your Salesforce org to test
- • Submit to check if your solution passes
- • Use hints if you get stuck
Note
You can test your code by connecting to Salesforce, but to save your progress and earn points, you'll need to create an account. Your solutions and achievements will be tracked automatically once you're logged in.