How to convert char array back to string

Question

There is a code which capitalize first word letter. However I wasn't able to find a method to convert char array back to String:

For example: "hello world" code transforms it to ["H", "e", "l", "l", "o", " ", "W", "o", "r", "l", "d"] I want to transform it back to "Hello World"

public class Solution
   {
    public static void main(String[] args) throws IOException
    {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String s = reader.readLine();

        char[] chars = s.toCharArray();
        chars[0] = Character.toUpperCase(chars[0]);

        for (int i = 0; i < chars.length; i++){
            if (chars[i] == ' '){
                chars[i + 1] = Character.toUpperCase(chars[i + 1]);
            }
        }
        System.out.println(chars);
    }
}

Refer to this question: http://stackoverflow.com/questions/7655127/how-to-convert-a-char-array-back-to-a-string — lybor, Jan 26 '16 at 10:41
https://www.tutorialcup.com/java/convert-char-array-to-string-in-java.htm — Rahul Gupta, May 14 '21 at 17:27

score 4 · Accepted Answer · answered Jan 26 '16 at 10:39

4

String str = String.valueOf( chars );

or

String str = new String( chars );

answered Jan 26 '16 at 10:39

sinclair

2,812
4
24
53

Could you please give an example using the above code example – Baurzhan Kozhaev Jan 26 '16 at 11:35

neurotic-d · Answer 2 · 2016-01-26T12:00:40.453

Two other remarks:

In your approach, you should make sure, that the [i+1] element actually exists. A String like "Test ", ending with a space, would throw an ArrayIndexOutOfBoundsException in your code.
You should either close the Reader, or better: use a try-with-resources block like

try( BufferedReder reader = new InputStreamReader(System.in) ) { ... } catch( ... ) { ... }

which closes the Reader for you.

How to convert char array back to string

2 Answers2

Related