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What are the important core topics in Java for beginners?

What are the important core topics in Java for beginners?

core java is the basic foundation for Java. You can find the below topics covered as part of core Java. Although all topics are essentials to have complete grip on Java in real time you may not need all of them.
What are the important core topics in Java for beginners

Core Java

Java is one amongst the foremost well-liked languages used nowadays. This is AN object-oriented artificial language, which is used to develop Desktop, Web and Mobile applications. For learning Java there's not any necessity that you simply ought to recognize the essential artificial language like C, C++. As a starter, you can start learning from Java itself. In here you'll learn In-depth theory information with sensible session till you're happy with the ideas. Learn Core Java Online Training



Java was developed by James goose and Sun Microsystems on may20, 1995. Earlier java is thought by name known as oak however it absolutely was unsuccessful as a result of it absolutely was designed for hand-held devices and setup boxes. Java could be a general object-oriented platform of a freelance artificial language. Java is meant for straightforward web application and its acceptance area unit widespread. Java supports polymorphism, inheritance and encapsulation. One important advantage of Java is that it is portable, multi-threaded, dynamic and extensible. Java security has been well thought and designed for schedule.


Java includes several development tools, techniques, classes, variables and applets. Java tools are comprised of Java Development Kit ( JDK) and it constitutes tools like java compiler and java interpreter. (API) Application Programming Interface is the classes and methods that are part of the Java Standard Library (JSL). Application Programming Interface constitutes several categories and strategies that area unit sorted into many packages in keeping with their practicality.
(JVM) is a component software implementation of a physical machine which provides an environment for running java programs. Java was developed with the construct of WORA ( write once run anywhere) that runs on a virtual machine. The compiler is going to be compilation the java file into a java. the class file then .class file is input into the Java virtual machine, which load and execute the class file.
Forte by Sun Microsystems
Borland JBuilder
Microsoft Visual J++
WebGain Café
IBM Visual Age for Java
Simple and Powerful
Automatic type checking
Automatic garbage collection
Robust, secure and safe
Simplified network access
Dynamic programming language
JDK 1.0 (January 23, 1996)
JDK 1.1 (February 19, 1997)
J2SE 1.2 (December 8, 1998)
J2SE 1.3 (May 8, 2000)
J2SE 1.4 (February 6, 2002)
J2SE 5.0 (September 30, 2004)
Java SE 6 (December 11, 2006)
Java SE 7 (July 28, 2011)
Java SE 8 (March 18, 2014)
Comments: comments are preceded by (//) in a line.
Reserved words: reserved words cannot be used for other purposes in the program and it has a specific meaning to the compiler.
Modifiers: modifiers specify the properties of information, strategies and categories. Some examples are private, abstract, final and protected.
Statements: {a statement|a press release|an ANnouncement} expresses an action or a sequence of actions.
Blocks: Blocks is a pair of braces that groups components of the program.
Classes: A class is a template or blueprint or rough draft for objects that are essential java construct.

Methods: method is a collection of statements that performs a sequence of operations.
In my purpose of reading, all the topics are important and practice in that so you can know more and better methods will be very important.

1.OOPS, ideas -If there's not the clarity of basic oops construct then doing core java isn't of a lot of importance. revise C/C++ and go through all the basic concepts of it.

2. File Handling-Important whereas handling the file on-line its vital in Java.

3. Strings-Very basic and important topics making bigger software always need the help of basic functions of strings.

4. Exception Handling and Thread Handling-Concepts perpetually build your career robust and basic ideas of why, where and how always make your life easier if you are a coder.

5.Collection Framework-Last but not the least. Collection Framework is the demand for Industry. Gives you extra flexibility while using Collection Framework. Basic limitations of arrays will be solved by implementing these methods.

Other topics:Swings,Applets,Frames,Packages,Generics,Access Modifiers and other basic concepts (which you already have done in C/C++ like loops, initialization process),Classes and objects,Wrapper class,Command line arguments,Garbage Collection(which is just to understand the process ,not worry about it)

There area unit more topics you'll undergo to possess an honest look of Java however on top of area unit the required stuff you ought to learn totally at any value if you want to be a Java Developer.

OOPs, concept - fundamentals of any object-oriented language. Try to understand how are these concepts applied in Java.

 Learn about:


Encapsulation - (Getters/Setters)

Inheritance - (Interface and abstract classes)

Polymorphism - (overriding and overloading)

Life of AN object in Java - Learn wherever objects and variables sleep in Java. What are stacks and heaps? You need to know about local and instance variables. Learn about constructors and a few important keywords such as 'this' and 'super'.

Classes - Learn about classes and class variables. You need to know about static variables/methods/block and static imports.

Variables - Java primitive types, Arrays, Wrapper classes, autoboxing and unboxing.

Exceptions - learn the way to handle unwanted things in java. Learn about runtime and compile time exceptions. Explore these five keywords - attempt, catch, finally, throws and throw

Data structures - one amongst the foremost necessary construct whereas learning any artificial language. Try to code your own data structures. Learn java collections.

Generics - Another powerful tool in java. You will notice generics heaps in production code. A must know the topic of java.

Death of AN object - study pickup of java. If you're beginning on java a minimum of getting yourself aware of the nomenclature.

Networking and Threads - One of the biggest advantages of Java is to reach out to other programs and process the requests in parallel. Learn about serialization, buffer readers/writers and life cycle of a thread. You should know about the Thread class and Runnable interface.

The theory :

object-oriented thinking - properties & operations

Inheritance, Composition and Contract(interface)

Encapsulation and private, protected, public scopes

Polymorphism - compile time, run time

boxing and unboxing



The pragmatics:
primitive types, Arrays in java

The String and immutability

The java.lang.* package

Object and it's methods - toString(), hashCode(), equals() and their purpose

POJO - plain old java object

Exceptions, Errors, stack trace and try-catch-final

Null and NullPointerException, RuntimeException ( this requires special mention)

Java Collections API - lists, sets, maps

Java streaming API - input streams, output streams, readers, writers, iterators, iterables

The classpath, class loading and the ClassNotFoundException

The annotations
Java concurrency - Thread, Executors, Runnable, Callable, Future

Do not forget to scan "Java code Conventions" to write down the lovely code

1) OOPS concepts (inheritance, polymorphism, abstraction )

2) java programming syntax with salutation world program comprehensive

3) access modifiers in java

4) study class, object, reference

5) some vital keywords like - new, static, abstract

6) Interface

7) Object class

8) Constructors

9) java lang package

10) all string types(mutable and immutable)

11) method overloading/method overriding

12) Inner classes

13) I/O

14) Exception Handling

15) Collection (very imp)
What are the important core topics in Java for beginners? What are the important core topics in Java for beginners? Reviewed by Raj Aryan on May 03, 2019 Rating: 5


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