Question

How to get the length of the last word in a string with Java

Answer 1

import java.util.List;
import java.util.Arrays;

public class Program {
    public static int lengthOfLastWord(String str) {
        List<String> words = Arrays.asList(str.split(" "));
        
        return words.get(words.size() - 1).length();
    }

    public static void main(String[] args) {
        String input = "java c go javascript rust";
        
        System.out.println("The length of the last word is: " + lengthOfLastWord(input));
    }
}



/*
run:

The length of the last word is: 4

*/

 

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Answer 2

public class Program {
    public static int lengthOfLastWord(String str) {
        return str.trim().lastIndexOf(' ') == -1 ? 
                str.trim().length() : str.trim().length() - str.trim().lastIndexOf(' ') - 1;
    }

    public static void main(String[] args) {
        String input = "java c go javascript rust";
        
        System.out.println("The length of the last word is: " + lengthOfLastWord(input));
    }
}



/*
run:

The length of the last word is: 4

*/

 

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