R4R ----> SCJP1.5 Chapter02

Abstract class is bassically never be instentiated. its mainly pupose of the mission of life .thats the soul purpose of them . We have a code for the abstract class : abstract class Car { private double price; private Color carColor; private String model; private String year; public abstract More --- >>

Accessng Static method is very importent for the any code .when instance of the classes in the code is absence then how to code is appropiate thats y we can use the accessing static method for make a appropiate cade. So in this way we access a static method (or static variable) is to use the dot ope More --- >>

When one class access to the another class , It means first class can do one of three things : > Create an instance of class B > Extend class B (in other words, become a subclass of class B). > Access certain methods and variables within class B, depending on the access control of those methods More --- >>

Whne we would like to declare the class and modies it then we use nested or inner class . some rules are there : > each sourse code file have a one public class only. > File name and class name should be same . > packege should be first line in the sourse code if class is a part of package . >I More --- >>

we have a example . there are 1 of abstract supar class which name is fruits and a concrete subclass which name is Apple. Supar class which is belonging to a package. We have a method which is following as : > Create the superclass as follows : package food; public abstract class Fruit{ / More --- >>

Declaration rules is bassically a identifying correctly constructed source files, package declarations, import statements, class declarations, interface declarations, method declarations, variable declarations, and identifiers. More --- >>

Declare class bassically a nested class , its also a method , We can also say instance variable and static variables automatic variables also.These are variables making appropiatelly use of all permitted modifiers.modifiers are like : > Public, > Final, > Static, > Abstract W More --- >>

When we create an interface We can define the functioning of the class i mean to say we can define whats the exactly the call can do .without saying anything about how the class will do it. INterface is abssically a contract.for the example we have a interface which name is Bounceable.Any class type More --- >>

In this interface we are allowed to put a constants in an interface,it would be much easier for programmers to remember names like HIGH_GRAVITY, LOW_BOUNCE, and HIGH_BOUNCE as opposed to knowing the exact int values corresponding to each of those. we have a following code : public final static int More --- >>

A class which is in the default access no modifiers are preceeding in te decleration.Its mostly imp thing is : > A class with default access can be seen only by classes within the same package. More --- >>

Method argument are bassiclaly a type of variable declration , which is appear in b/w the paranthesis in the method declration , A typical method declration are following as : public Record getRecord(int fileNumber, int recordNumber) {} method argiment is similarilt as a local variables More --- >>

final class bassically used when we are wokring n the class declaration .that time we are using the final keyword when we would like to show the " the class can’t be subclassed" .We also can say in diff terms : no other class can ever extend (inherit from) a final class, and any attempts to do so wi More --- >>

Page 1