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Java - Method Character.toString() — The Character.toString () method returns a string object (String) and represents the specified char value as a single character string.

String toString(char ch)

Detailed information about the parameters:

public class Test{

   public static void main(String args[]){
      System.out.println("Value \"" + Character.toString('Q') + "\" is a string object.");
      System.out.println("Value \"" + Character.toString('S') + "\" is a string object.");
   }
}

Output

Value "Q" is a string object.
Value "S" is a string object.