In Java how does one turn a String into a char or a char into a String?
JavaStringCharJava Problem Overview
Is there a way to turn a char into a String or a String with one letter into a char (like how you can turn an int into a double and a double into an int)? (please link to the relevant documentation if you can).
How do I go about finding something like this that I'm only vaguely aware of in the documentation?
Java Solutions
Solution 1 - Java
char firstLetter = someString.charAt(0);
String oneLetter = String.valueOf(someChar);
You find the documentation by identifying the classes likely to be involved. Here, candidates are java.lang.String and java.lang.Character.
You should start by familiarizing yourself with:
- Primitive wrappers in
java.lang - Java Collection framework in
java.util
It also helps to get introduced to the API more slowly through tutorials.
Solution 2 - Java
String.valueOf('X') will create you a String "X"
"X".charAt(0) will give you the character 'X'
Solution 3 - Java
As no one has mentioned, another way to create a String out of a single char:
String s = Character.toString('X');
> Returns a String object representing the specified char. The result is > a string of length 1 consisting solely of the specified char.
Solution 4 - Java
String someString = "" + c;
char c = someString.charAt(0);
Solution 5 - Java
String g = "line";
//string to char
char c = g.charAt(0);
char[] c_arr = g.toCharArray();
//char to string
char[] charArray = {'a', 'b', 'c'};
String str = String.valueOf(charArray);
//(or iterate the charArray and append each character to str -> str+=charArray[i])
//or String s= new String(chararray);
Solution 6 - Java
In order to convert string to char
String str = "abcd";
char arr [] = new char[len]; // len is the length of the array
arr = str.toCharArray();
Solution 7 - Java
I like to do something like this:
String oneLetter = "" + someChar;