what is difference between object value and object hashCode value

Question

class RefDem
{
    public void m1()
    {
      System.out.println("m1() method....");
    }
}
class RefDemo
{
   public static void main(String[] args)
    {
   //d is object of RefDem class
    RefDem d=new RefDem();
    d.m1();
   System.out.println("d :"+d);
  System.out.println("d hash code :"+d.hashCode());
}
}

output:

m1() Mehtod
d : RefDem@1e5e2c3  //please explain what is this value
d hash code : 31843011   //please explain what is this

This question appears to be off-topic because the answer for it can be found in any manual or even javadocs — Alexey Malev, Jun 02 '14 at 12:58
possible duplicate of [How is hashCode() calculated in Java](http://stackoverflow.com/questions/2427631/how-is-hashcode-calculated-in-java) — earthmover, Jun 02 '14 at 13:03
You should take a look at [code of `toString()`](http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/8-b132/java/lang/Object.java?av=f#235) method from `Object` class. — Pshemo, Jun 02 '14 at 13:06

score 0 · Answer 1 · answered Jun 02 '14 at 13:07

0

The first is the standard output for the toString() method. See here.

The second is the hashcode for this object.

answered Jun 02 '14 at 13:07

Dawnkeeper

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score 0 · Accepted Answer · answered Jun 02 '14 at 13:10

You did not override toString and hashValue, so the implementations from Object are used.

toString() returns a String consisting of the class name (RefDem) and the memory location in hexadecimal form (1e5e2c3) seperated by "@".

"d :" + d is equivalent to "d :" + d.toString() so you get "d :RefDem@1e5e2c3"

The hashCode implementation of Object returns the memory location of the Object (as int) which is 31843011 (note that 31843011 == 0x1E5E2C3)

what is difference between object value and object hashCode value

2 Answers2