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Java Interview Basic Concepts

Source: Internet
Author: User
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1. Abstract class

Abstract class can has anything a normal class can have plus abstract method

 Public Abstract class Test11 {    publicint  A;     Private int b;      Public Abstract void F1 ();      Public void F2 () {    }}

2. Interface

Only variable and abstract method,

Can extends another interface,

Cannot extends class or Implement interface

 Public Interface extends Inter1 {    publicint a = 1;      Public Abstract void F1 ();      Public void f2 ();}

Java Interview Basic Concepts

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