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How to get the Length of the Last Word in a String using Java

The challenge

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word (last word means the last appearing word if we loop from left to right) in the string.

If the last word does not exist, return 0.

Note: A word is defined as a maximal substring consisting of non-space characters only.


Input: "Hello World"
Output: 5

The solution in Java

class Solution { public int lengthOfLastWord(String s) { // catch edge case of blank input if (s.length()<=) return ; // split into words String[] words = s.split("\\s+"); // if one or less words, then return the length of the trimmed string if (words.length<=1) return s.trim().length(); // get the alst word String lastWord = words[words.length-1]; // return the last word's length return lastWord.length(); } }
Code language: Java (java)

See also  How to Reverse a Number in Java
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