object vs instance vs reference in java

Question

Can anyone explain what is the difference between object vs instance vs reference, with a good example?

I'm confused about this part:

Reference points to an instance of an object. – Rahul Tripathi Apr 28 '16 at 06:14 — Rahul Tripathi, Apr 28 '16 at 06:14

score 4 · Answer 1 · answered Apr 28 '16 at 06:13

4

classA a is a reference variable.

new classA(); created Object / Instance

a = new classB() is assign object reference to variable

answered Apr 28 '16 at 06:13

muzahidbechara

Then what is classA a; classB a = new classB(); – Suresh Kumar Msk Apr 28 '16 at 06:15
Its actually 2 statement - ``classA a; `` is a statement just declared reference variable without assignment. and ``classB a = new classB();`` is a statement with assigment – muzahidbechara Apr 28 '16 at 06:17

score 0 · Answer 2 · answered Apr 28 '16 at 06:23

0

ClassA a is reference

a = new ClassA() a object os asign reference to variable

2 a = new classB() is pass the reference of classB

3 Here classA is override becauseeyou set same same name of reference

answered Apr 28 '16 at 06:23

Chirag Sondagar

2 Answers2