Java Programming

Definition of Basic Data Types in Java: Datatype  (data-types) is the name of storage format which store the specific type's and its corresponding range's value. Different data types have been defined by java. These data types are frequently  used  by programmers. Data types in java are used to specify whether which type of value will be stored in specified variable. A variable is responsible for storing the particular value. But a variable does not store value itself. Variable is just a name for a memory location where a value is to be stored.Java has been defined different types of basic data types. We categorize them broadly into 2 category. There are defined two types of data types in java- Primitive Data Types Non-Primitive/Reference Data Types Primitive Data Types: Primitive means ancient. As its meaning states Primitive Data Types are defined already in the Java API. Programmers can use th...

Internal Mechanism of Object creation code in java Java:Internal mechanism of java object creating code in java-programming. Let us describe what is the main mechanism behind object creating code in java-programming. I am telling you what happens internally when an object gets created.   I f class name is My_class then object creation code will be- My_class ob=new My_class(); We know that class is a reference data type in java. So "ob" is called as the reference variable of My_class. We know that assignment operator assigns some value from right hand side to left hand side. Here some value is being assigned to ob variable. new operator is responsible for creating the object of the java program. We can not fetch address of the object so we assign reference of the object in a reference variable i.e."ob". Now we have the reference of object in "ob" variable by which we can access all non static variable of the My_class. Here we are telling each ...

Objects in Java :An object oriented programming language Definition of an Object: An object in java programming is an instance of a class. Object is the implementation of the concept given by the class. Whenever an object is created all the non static member of the class gets activated. Object in java programming is responsible for allocating memory to all non static member of the class. When object of the class is created , a context is created into heap memory area. In this heap memory all the non static member gets memory. The size of the context in heap is decided according to the members(if there are 2 integer variable in the class and 2 float variable then size of the context will be 16 bytes). Here is a demonstration of how a member gets memory in the heap memory area(HMA). Discussing back to the object, Basically object is used to access/call non static members of the class. Without creating object we are unable to use members of the class, but indirectly ...

Compilation of Java Program Compilation of Java program is necessary before its execution. Javac is the compiler of java which compiles the source code of java program and JVM is the interpreter which generates machine code from the compiled source code. Compiling a java program we need a compiler known as JAVAC . See how to compile a java program in java programming. Compilation of a java program contains following steps- 1-Type your java program in a text editor. 2-Save it with the name of class with .java extension in your java program. 3-Now open command prompt and go to directory in which your java program has been saved. 4-Set the path of javac using set path=”path” 5-Type javac and enter file name with .java extension and press enter. 6-If your program is error free it will generate one or more .class file. 7-Type java and then file name without any extension and press enter. Now you will see output. For example if your java progr...

JVM : Acronym of JVM(Java Virtual machine) . JVM is the main part of java .To Know more about JVM in java programming , read this post and see related articles. Step by step java programming tutorial. Java Virtual Machine ( JVM ), the powerful tool of java has made java unbeatable in the programming language's industry.  JVM ,In short Java Virtual Machine is also known as JVM . Unlike other language java has different way to execute the program. Every language needs a compiler to compile the source code. Java also has compiler to compile the source code but instead of compiler it also has an interpreter to interpret the compiled code. JVM (Java Virtual Machine) : What is JVM- Concept behind this approach is that unlike other language java is a platform independent language i.e. program written on java can be executed on any platform. Now question arises how it is possible. Code written on java first compiled by java compiler and converted in to a...

Introduction to java programming language. Step by step explanation of java programming introduction. Here we explaining introduction and basic concepts of java programming. Java has been defined by many authors. Most of java authors have been written much content in their posts. Readers of java can get sufficient information from those sites but they cannot know actual internal mechanism of java in those posts. I will tell learners the reality and internal working of java in my blog. Java is a programming language made by James gosling and his team. Java was created only for electronic consumable devices but later on it grew its size and now it is divided into 3 broad fields… 1. J2SE 2. J2ME 3. J2EE Initially core idea behind java development was to develop a language which can be used for th e programming of the chips . Java developers want to handle machines by the use of remotes. They did it along with development of the area of java too. Java i...