How to convert a char to a String?
char, java, string, type-conversion
Solution
You can use `Character.toString(char)`. Note that this method simply returns a call to `String.valueOf(char)`, which also works.
As others have noted, string concatenation works as a shortcut as well:
String s = "" + 's';
But this compiles down to:
String s = new StringBuilder().append("").append('s').toString();
which is less efficient because the `StringBuilder` is backed by a `char[]` (over-allocated by `StringBuilder()` to `16`), only for that array to be defensively copied by the resulting `String`.
`String.valueOf(char)` "gets in the back door" by wrapping the `char` in a single-element array and passing it to the package private constructor `String(char[], boolean)`, which avoids the array copy.
Problem
I have a `char` and I need a `String`. How do I convert from one to the other?