Summary core java full detailed notes

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1. INTRODUCTION OF JAVA 1
1.1.1. Platform independent
1.1.2. Open source
1.1.3. Multi-threading
1.1.4. More secure
1.1.5. portable
2. CORE JAVA TOPICS ...4
2.1.1. Oops concept
2.1.2. Control statement and looping
2.1.3. Arrays
2.1.4. String
2.1.5. Collections
2.1.6. Exceptions
2.1.7. Constructor

3. IN ROD C ION OF OOPS 6
3.1.1. Class
3.1.2. Object
3.1.3. Method
3.1.4. Encapsulation
3.1.5. Inheritance
3.1.6. Polymorphism
3.1.7. Abstraction

4. ENCAPS LA ION ... 7

5. INHERI ANCE .7
5.1.1. Single inheritance
5.1.2. Multilevel inheritance
5.1.3. Multiple inheritance
5.1.4. Hybrid inheritance
5.1.5. Hierarchical inheritance

6. ACCESS SPECIFIER .. 9
6.1.1. Public
6.1.2. Private
6.1.3. Protected
6.1.4. Default

7. DA A PES AND RAPPER CLASS ... 10
7.1.1. Data types
7.1.2. Wrapper class




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,8. CONTROL STATEMENT 12
8.1.1. If
8.1.2. If-else
8.1.3. If-else-if

9. LOOPING 13
9.1.1. For
9.1.2. While
9.1.3. Do-while

10. POL MORPHISM 17
10.1.1. Method overloading
10.1.2. Method overriding

11. ABS RAC ION ...20
11.1.1. Abstract class
11.1.2. Interface

12. ARRA S 22

13. S RING ..25
13.1.1. String functions
13.1.2. Literal string
13.1.3. Non-literal string
13.1.4. Mutable string
13.1.5. Immutable string

14. COLLEC IONS 26
14.1.1. List
14.1.2. Set
14.1.3. Map

15. E CEP ION 59
15.1.1. Unchecked exception
15.1.2. Checked exception
15.1.3. Exception handling

16. CONSTRUCTOR 73

17. CORE JA A IN ER IE Q ES IONS AND ANS ERS .79

18. CORE JA A IN ER IE PROGRAMS ...92

19. JDBC CONNECTIONS ..98


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,JAVA INTRODUCTION

Java is a simple programing language
Writing, compilation and debugging a program is very easy in java
It helps to create reusable code
Java has more features,

1. Platform independent
2. Open source
3. Multithreading
4. More secure
5. Portable


1. Platform independent


During the compilation the java program converts into byte code
Using byte code we can run the application to any platform such as windows, mac, linux, etc

2. Open source:
A program in which source code is available to the general public for use and/or modification
from its original design at free of cost is called open source

3. Multithreading:
Java supports multithreading
It enables a program to perform several task simultaneously

4. More secure:
It provides the virtual firewall between the application and the computer
So it s doesn't grant unauthorized access

5. Portable:
"Write once run anywhere"
Java code written in one machine can run on another machine



1. CORE JAVA

Syllabus:

1. Oops concept
2. Control statement/looping
3. Arrays
4. String
5. Exceptions
6. Collections




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, Terminology:

1. JDK
2. JRE
3. JVM

JDK:

Java Development Kit
If run any applications we need JDK have to installed
JDK versions: 1.0 to 1.9
Mostly V1.8 is used now

JRE:

Java Runtime Environment
It is a pre-defined. class files (i.e.) library files

JVM:

Java Virtual Machine
It is mainly used to allocate the memory and compiling

TOOLS:

1. Notepad
2. Net bean
3. Eclipse
4. J Developer-oracle
5. RAD-IBM
Nowadays we mostly used eclipse (75% of the people using).
Versions of eclipse:
Juno
Kepler
Luna
Mars
Neon

OOPS CONCEPT:

Object Oriented Programing Structure
OOPS is a method of implementation in which programs are organized as collection of objects, class
and methods




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