interviews/leetcode/string/ValidPalindrome.java at master · codingOnGithub/interviews · GitHub

25 lines (20 loc) · 668 Bytes

public class ValidPalindrome {

public boolean isPalindrome(String s) {

int left = 0;

int right = s.length() - 1;

while(left < right) {

while(!Character.isLetterOrDigit(s.charAt(left)) && left < right) {

left++;

}

while(!Character.isLetterOrDigit(s.charAt(right)) && right > left) {

right--;

}

if(Character.toLowerCase(s.charAt(left)) != Character.toLowerCase(s.charAt(right))) {

return false;

}

left++;

right--;

}

return true;

}

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