Output of System.out.println(object)

Question

I want to know what exactly the output is when I do the following.

class Data {
  int a = 5;
}

class Main {
  public static void main(String[] args) {
    d         


        

Answer 1

That code calls the default toString() implementation of the Object class, that is:

public String toString() {
    return getClass().getName() + "@" + Integer.toHexString(hashCode());
}