How to represent empty char in Java Character class

Question

I want to represent an empty character in Java as \"\" in String...

Like that char ch = an empty character;

Actually I want to rep

Answer 1

char means exactly one character. You can't assign zero characters to this type.

That means that there is no char value for which String.replace(char, char) would return a string with a diffrent length.

Answer 2

char ch = Character.MIN_VALUE;

The code above will initialize the variable ch with the minimum value that a char can have (i.e. \u0000).

Answer 3

As chars can be represented as Integers (ASCII-Codes), you can simply write:

char c = 0;

The 0 in ASCII-Code is null.

Answer 4

You can only re-use an existing character. e.g. \0 If you put this in a String, you will have a String with one character in it.

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Say you want a char such that when you do

String s = 
char ch = ?
String s2 = s + ch; // there is not char which does this.
assert s.equals(s2);

what you have to do instead is

String s = 
char ch = MY_NULL_CHAR;
String s2 = ch == MY_NULL_CHAR ? s : s + ch;
assert s.equals(s2);

Answer 5

As Character is a class deriving from Object, you can assign null as "instance":

Character myChar = null;

Problem solved ;)

Answer 6

this is how I do it.

char[] myEmptyCharArray = "".toCharArray();