The opposite method of Integer.toString(char)

Question

public static String char2Str(char c) {
    return Integer.toString(c);
}

EDIT: For example, char2Str('ɮ') returns 622.

How do I implement the opposite method of the above (str2Char())?

You want to reduce a string to a single char? That's not really how it works. — Ben, May 23 '18 at 12:17
What are you expecting to pass into `char2Str` ? because you are taking in a `char` and treating it like an integer. — khelwood, May 23 '18 at 12:18
You should probably use `Character.toString(c)` rather than `Integer` — Michael, May 23 '18 at 12:18
A `String` contains more information than a `char`. A `char` consists of a **single** character. A `String` may contain **multiple** character. Do you want to extract only the first character? Or rather get a whole array of characters, a `char[]`? Note that your question was asked already, simply search for "*java convert string to char*", first hit on Google. Note that a `char` is not the same as an `int`. Instead of converting using utility methods for `int` from `Integer` you should use utilities for `char` from `Character`. — Zabuzard, May 23 '18 at 12:26
At least provide some examples to demonstrate input and desired output. Otherwise your question may be **unclear**. Which it is at the moment, it is not clear if you want a `char[]` or only extract the first `char`. — Zabuzard, May 23 '18 at 12:29

Tiago Mussi · Answer 1 · 2018-05-23T12:39:16.300

2

You should have something like that:

Char to String

public static String char2Str(char c) {
    return Character.toString(c);
}

String to Char

When converting String to char, your output will be an array of characters as bellow:

public static char[] str2Char(String s) {
    return s.toCharArray();
}

edited May 23 '18 at 12:39

answered May 23 '18 at 12:22

Tiago Mussi

score 0 · Answer 2 · answered May 23 '18 at 12:17

0

If you know String is of single length (just a single char), Use

char c = s.charAt(0);

Your method

public static char str2Char(String s) {
    return s.charAt(0);
}

answered May 23 '18 at 12:17

Hemant Patel

2

His above sample appears to be putting the integer value in a string, this may be a case for `Integer.parseInt()` – cyroxis May 23 '18 at 12:20

score 0 · Answer 3 · answered May 23 '18 at 12:20

0

you have to be sure that your string contains only 1 char, then use

s.charAt(0)

if not, you can get the array of chars and then return the one you need or the whole array

char[] arr = s.toCharArray();

answered May 23 '18 at 12:20

secario

score 0 · Answer 4 · answered May 23 '18 at 12:24

0

If your string contains exactly one character the simplest way to convert it to a character is probably to call the charAt method:

char c = s.charAt(0);

answered May 23 '18 at 12:24

Instead of linking like that you can just flag as duplicate... that needs 15 reputation. Before that consider answering other questions instead. (however, this answer is sufficiently self-contained, no problem) – user202729 May 23 '18 at 13:33
Another suggestion: You can [format code blocks](https://meta.stackoverflow.com/questions/251361/how-do-i-format-my-code-blocks). – user202729 May 23 '18 at 13:34
thanks for the information – François Bourrée May 23 '18 at 13:56

4 Answers4