Class V.S Object V.S Instance

Question

What is the definition of a Class , Object and an Instance and what is the difference between an Instance and an Object.

I would like my answer in Simple English

Answer 1

Class is collection of various objects, variables, functions etc.

class DemoClass {

    void method(){
       ......
    }   
}

When you want to create a new instance of a class you need to create a new object of that class.

DemoClass dc = new DemoClass();

You can then access this instance (methods etc. of this instance) from the object you created.

dc.method();