Converting a Character Array to a String without Empty Spaces

Question

I'm having an issue with converting an array of characters to a string in Java. I only want to copy characters that are not empty. Take this code for example:

import java.util.*;
import java.lang.*;
import java.io.*;

class CharArrayToStringTest
{
    public static void main (String[] args) throws java.lang.Exception
    {
        // works just fine - string has 5 characters and its length is 5
        char[] word = {'h', 'e', 'l', 'l', 'o'};
        String sWord = new String(word);
        System.out.println("Length of '" + sWord + "' is " + sWord.length());

        // string appears empty in console, yet its length is 5?
        char[] anotherWord = new char[5];
        String sAnotherWord = new String(anotherWord);
        System.out.println("Length of '" + sAnotherWord + "' is " + sAnotherWord.length());
        // isEmpty() even says the blank string is not empty
        System.out.println("'" + sAnotherWord + "'" + " is empty: " + sAnotherWord.isEmpty());
    }
}

Console output:

Length of 'hello' is 5
Length of '' is 5
'' is empty: false

How do I create a string from an array of characters where any blank characters at the end of the string are left out?

String sAnotherWord = (new String(anotherWord)).trim();

user681574
– user681574

2017-03-18 05:46:24 +00:00
Commented Mar 18, 2017 at 5:46 — user681574
– user681574, Commented Mar 18, 2017 at 5:46

Community · Accepted Answer · 2017-05-23 12:17:38Z

3

Try trimming the trailing spaces in the String using String.trim(). Just do : -

char[] anotherWord = new char[5];
String sAnotherWord = new String(anotherWord);
sAnotherWord = sAnotherWord.trim();

Now, the spaces would be removed.

Edit 1: As mention by spencer.sm in his answer, your second print statement is faulty, as it prints sWord.length() instead of sAnotherWord.length().

edited May 23, 2017 at 12:17

CommunityBot

11 silver badge

answered Mar 18, 2017 at 5:49

dumbPotato21

5,7035 gold badges25 silver badges36 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

spencer.sm · Accepted Answer · 2017-03-18 06:02:17Z

2

You cannot have an empty char in Java. All chars must be exactly one character. If you want to remove whitespace at the end of a string, use the String trim() method.

Also, your second print statement should end with sAnotherWord.length() instead of sWord.length(). See below:

System.out.println("Length of '" + sAnotherWord + "' is " + sAnotherWord.length());

answered Mar 18, 2017 at 6:02

spencer.sm

20.8k10 gold badges86 silver badges98 bronze badges

1 Comment

zbalda Over a year ago

Thanks! I fixed the typo.

Collectives™ on Stack Overflow

Converting a Character Array to a String without Empty Spaces

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related