(char)

Code:

---

  public class prg {
      public static void main(String[]args) {
        int i;
        i=10;
        char a = 'n';
        System.out.println((char)('n'+i));  //<---------------
      }
  }

---

The output I get is x
Similarly if it is (char)('n'+2),output is p

I really don't get it.What is happening here? What does (char) actually do?

char is an integer describing a characters code. So you can modify it by adding integers to get other characters.

EDIT: (char) casts an integer to a character interpreting it as character code, google "java type casting" maybe to get more info about casts.

Primitive Data Types (The Java™ Tutorials > Learning the Java Language > Language Basics)
"char: The char data type is a single 16-bit Unicode character. It has a minimum value of '\u0000' (or 0) and a maximum value of '\uffff' (or 65,535 inclusive)."
Unicode Zeichentabelle
n = 6e hex = 110 dec
110 + 10 = 120 dec = 78 hex = x