java - where instance variables get initialized

Question

public class Ex
{
  int a;
  public Ex()
  {
      System.out.println("a is "+a);
   }
}

output is:a is 0

where a gets initialized...

i know that default values for int is zero..my question is that where it gets initialied ..through default constructor ?(i heard that default constructor is created when we don't mention any constructor in the class)

Answer 1

If you didn't initalize a yourself (it's a primitive value), it gets initialized automatically to it's default value, 0 in this case.

Read section 4.5.5. (Initial Values of Variables) in this document.