Core Java Tutorial Free online

java syllabus for android development

what are java basics

Core java
OOPS Concepts
Multi-threading
exception handling

And as for 2 hours of dedicated learning. I think it shouldn’t take more than 20-25 days,

http://code.tutsplus.com/categories/android-sdk

Installing Java and Eclipse

JDK 7 download

java core and advanced syllabus

Core JAVA:
• INTRODUCTION TO JAVA
• OOPS CONCEPTS
• LOOPING & ARRAYS
• EXCEPTION HANDLING
• FILE HANDLING
• THREADING & MULTITHREADING
• COLLECTION FRAMEWORK

Advanced
• APPLETS
• SWINGS
• SQL AND PL/SQL OR MYSQL
• JDBC

J2EE:
• HTML
• JSP
• SERVLETS
• XML

• MODEL VIEW CONTROLLER – MVC
• STRUTS/SPRING/HIBERNATE

Class; set of objects class first letter must be UPPER CASE,
METHOD: first letter lowercase
Java project name as same as class name,
Public static void main

Main method is compulsory in every java programme.

Object:
Intizer:

Identifiers: must start with LETTers or $ _ ,
Other than this not works.

Variables:
Static variable (class)
Instance variables ( non static)
Local variables

Arrays: these object but stores multiple variables.

Class; set of objects class first letter & inner word 1st letter must be UPPER CASE, Ex: class MyNewClass

METHOD: first letter lowercase

Java project name as same as class name,

Class name starts with Big letter object /variable in starts with small letter.

Public static void main

Main method is compulsory in every java programme.

Object: instance of class called as object

To call method other than main
We have to create object in main method and then call new method with object.

Ex. Object.method()

Identifiers: must start with Letter or $ _ , (not with 123 etc) (classes,methods, objects names called as identifiers)

Other than this not works.

modifiers: we will modify classes & objects in java

Acess modifiers: deafult,public, private protected

Non-acees modifiers: final,abstract,strictfp

Arrays: these object but stores multiple variables of the same type

we can declare array size & index (starts from zero left to right) the elements.

int[] arr =new int[5]

5 is the array size

arr[3]= 54; 54 is the 3rd number in the array index

multidimensional arrays: basically two-dimensional arrays are more famous.

int[][]sample = {{1,2,3}, {4,5,6}

to call this we have to provide to index 1 for array 2nd one for the element in that array

int y=sample[1][0]

system.ou.println(y);

//output is 4; 1 is 2nd array & 0 is the 1st element in the 2nd array.

row index and column index are 2 multidimensional indexes

Variables:

used to store values in the programming language.

Static variable (belongs to the class instead of single method)

Instance variables ( nonstatic)

Local variables

Intizer: type of variale to store intizer valus like 1,2,3.30, (int)

Member variable: string stored for names

Enums: just like arrays but restrict variable in predefined way.

enum student{ school, college, university}

Student a = student.schoool

Method: also called as function to perform a task. first letter should be small and inner words capital.

Void:indicates non return value

Static: method & object belong the class instead of object/instance.

Comments:

Single lined //comment

multi line comments /*ghhg

jjjggg*/

Basics:

Loops & Conditional statements

For loop

Do while

if else

enhanced for loop (for each loop)

Iteration:

Class/Objects methods:

java package is a group of classes. classes hold different objects/methods and variable all the code.

Class

Super class & subclass

Inheritance: Subclass inherited from subclass by // Superclass extends subclasses. (we can call existing class from newly created class for using the same code)

interfaces: abstracts class (contract between classes)

@override

getters & setters

Java utilities;

import java.uitilities.scanner/formmatter/

Scanner useful to read documents in a path.

formatter creates and adds content to the document.

Special methods:

Constructors: same as class and should have Nonreturn value (void)

Exception handling:

checked exceptions

throws try catch exception e implement runnable.

unchecked Runtime exception

http://www.felight.com/core-java-and-advanced-java-syllabus/

http://docs.oracle.com/javase/tutorial/java/concepts/

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