Java programming language was originally developed by Sun Microsystems which was initiated by James Gosling and released in 1995 as core component of Sun Microsystems' Java platform (Java 1.0 [J2SE]).
The latest release of the Java Standard Edition is Java SE 8. With the advancement of Java and its widespread popularity, multiple configurations were built to suit various types of platforms. For example: J2EE for Enterprise Applications, J2ME for Mobile Applications.
The new J2 versions were renamed as Java SE, Java EE, and Java ME respectively. Java is guaranteed to be Write Once, Run Anywhere.
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Object Oriented − In Java, everything is an Object. Java can be easily extended since it is based on the Object model.
Platform Independent − Unlike many other programming languages including C and C++, when Java is compiled, it is not compiled into platform specific machine, rather into platform independent byte code. This byte code is distributed over the web and interpreted by the Virtual Machine (JVM) on whichever platform it is being run on.
Simple − Java is designed to be easy to learn. If you understand the basic concept of OOP Java, it would be easy to master.
Secure − With Java's secure feature it enables to develop virus-free, tamper-free systems. Authentication techniques are based on public-key encryption.
Architecture-neutral − Java compiler generates an architecture-neutral object file format, which makes the compiled code executable on many processors, with the presence of Java runtime system.
Portable − Being architecture-neutral and having no implementation dependent aspects of the specification makes Java portable. Compiler in Java is written in ANSI C with a clean portability boundary, which is a POSIX subset.
Robust − Java makes an effort to eliminate error prone situations by emphasizing mainly on compile time error checking and runtime checking.
Multithreaded − With Java's multithreaded feature it is possible to write programs that can perform many tasks simultaneously. This design feature allows the developers to construct interactive applications that can run smoothly.
Interpreted − Java byte code is translated on the fly to native machine instructions and is not stored anywhere. The development process is more rapid and analytical since the linking is an incremental and light-weight process.
High Performance − With the use of Just-In-Time compilers, Java enables high performance.
Distributed − Java is designed for the distributed environment of the internet.
Dynamic − Java is considered to be more dynamic than C or C++ since it is designed to adapt to an evolving environment. Java programs can carry extensive amount of run-time information that can be used to verify and resolve accesses to objects on run-time.
Features of Java
Java Virtual Machine
C , C++ & Java : A comparison
Platforms of Java & Versions
First Java Program
8 Data types in java, complete overview.
Types of variables Operators & statements
Reading input from java.util.Scanner class
Displaying output with System.out.printf()
Displaying formatted output with String format()
Creating an object
Initializing an instance variable
Constructors & its types
Method prototype, static keyword
Mutators & Accessors
Passing parameters in methods (primitives & Objects)
Relating objects using references
Concept of inheritance
The keyword ’super and final’
Abstract Method & Classes
Multiple Inheritance using Interfaces
Abstract Classes vs. Interfaces
Why java arrays are different from the array of C and C++
How array can be created in java
How is array iterated in java
The zigzag array
How array can be used in software development
Executors and ThreadPools to concurrently schedule tasks
Parallelism and the Fork-Join framework
String class methods
Immutability of strings
Spring 3 Architecture
Introduction to Inversion Of Control
Creating string buffer object
String buffer class methods
String builder class
Concept of Packages
Need to packages
How to creat packages using copiler
How to use packeges
Concept of JAR file
How to creat the JAR file
Errors in java program
Concepts of exceptions
Byte, Short, Integer, Long, Float, Double, Boolean Classes
What is a Java thread
Need of thread in Java
The constructor and methods of Thread class
Life cycle of Java thread
Writing Thread using Thread Class and Runnable Interface
Daemon and Non-Daemon threads
Synchronization in java
Writing a real life application using multi-threads