Converting stream of int's to char's in java

Question

Maybe you are asking for:

Character.toChars(65) // returns ['A']

More info: Character.toChars(int codePoint)

Converts the specified character (Unicode code point) to its UTF-16 representation stored in a char array. If the specified code point is a BMP (Basic Multilingual Plane or Plane 0) value, the resulting char array has the same value as codePoint. If the specified code point is a supplementary code point, the resulting char array has the corresponding surrogate pair.

It depends on what you mean by "convert an int to char".

If you simply want to cast the value in the int, you can cast it using Java's typecast notation:

int i = 97; // 97 is 'a' in ASCII
char c = (char) i; // c is now 'a'

If you mean transforming the integer 1 into the character '1', you can do it like this:

if (i >= 0 && i <= 9) {
char c = Character.forDigit(i, 10);
....
}

If you're trying to convert a stream into text, you need to be aware of which encoding you want to use. You can then either pass an array of bytes into the String constructor and provide a Charset, or use InputStreamReader with the appropriate Charset instead.

Simply casting from int to char only works if you want ISO-8859-1, if you're reading bytes from a stream directly.

EDIT: If you are already using a Reader, then casting the return value of read() to char is the right way to go (after checking whether it's -1 or not)... but it's normally more efficient and convenient to call read(char[], int, int) to read a whole block of text at a time. Don't forget to check the return value though, to see how many characters have been read.

If you want to simply convert int 5 to char '5': (Only for integers 0 - 9)

int i = 5;
char c = (char) ('0' + i); // c is now '5';

Simple casting:

int a = 99;
char c = (char) a;

Is there any reason this is not working for you?

This solution works for Integer length size =1.

Integer input = 9; Character.valueOf((char) input.toString().charAt(0))

if size >1 we need to use for loop and iterate through.