Lesson-1:
Class, Object and Methods of Java can be compared with body, heart and brain. Without these 3 things, Java does not exist. If you Google the above 3 items, you will find many definitions. But be honest and think how many of you can really understand the actual concept. Let me explain it in my way:
Class: I would say a class is a community, like Human or Indian.
Object: Object belongs to a particular community/class and holds behaviours of that class. Like you, me, he, she etc who belong to or represent the human community.
Method: Method defines some specific functionality of the belonging class. As for example eating, speaking is some functionalities of human class. But the functionality many vary from object to object. Like you speaks English and I speaks the Hindi language. We both are objects of the Human class.