Bytecode: The intermediate code produced by certain semi-compiled programming languages, in particular SMALLTALK and JAVA, So called because each instruction is one byte long. Source programs are com piled into bytecode, which is then executed by a bytecode INTERPRETER or VIRTUAL MACHINE that forms part of the language RUN-TIME SYSTEM. In such languages, programs may be distributed either in SOURCE CODE or in bytecode form.
A very popular WEB SERVER developed and distributed free of charge as OPEN SOURCE software by an Internet-based community of unpaid volunteers. Apache’s great strengths lie in the availability of its source code and its well-defined interface for writing add-on modules: many large and profitable e-commerce sites run on modified versions of Apache. The name is a wince-making pun on the phrase ‘a patchy server’, bestowed because of the numerous software PATCHES released for it in its early days.
Java is a robust, general-purpose, high-level programming language and a powerful software platform. It is also object-oriented, distributed, portable and multi-threaded. Java follows the ‘Write – once – run – anywhere’ approach. All Java programs must run on the Java platform that has two components, the Java Virtual Machine (JVM) and the Java Application Programming Interface (API). [Read more…] about Types of Java Programs
It is better to have all numerical, strings and characters in terms of objects so to avail the facility of methods supplied with those objects. In that case, even if we want to perform any arithmetical operation, we do it with the help of methods instead of using arithmetical operators. But by this approach, performance decreases because method calls are relatively expensive. [Read more…] about Type Wrapper in java
When you create new projects, you should see that there is quite a lot of text that is greyed-out and contains slashes and asterisks. These are called comments and, when you run your program, the compiler will ignore them. Comments are usually non executable statements which are meant for the programmers own convenience. [Read more…] about What are Comments in Java? – Definition
In computer science, “type casting” and “type conversion” refers when there is either implicitly or explicitly is a conversion from one data type to another. When both types of expression are compatible with each other, then Data type conversions from one type to another can be carried out Automatically by java compiler. However, there is a technical difference between type conversion and type casting, i.e. type conversion is carried out “automatically” by java compiler while the “type casting” (using a cast operator) is to be explicitly performed by the java programmer.It is usually classified into two categories [Read more…] about Difference Between Type Conversion and Type Casting
Keywords also are known as reserved words are the pre-defined identifiers reserved by Java for a specific purpose that inform the compiler about what the program should do. A Keyword is that which have a special meaning those already explained to the java language like int, float, class, public, etc. these are the reserved keywords. These special words cannot be used as class names, variables, or method names, because they have special meaning within the language.
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Java Tokens:- A java Program is made up of Classes and Methods and in the Methods are the Container of the various Statements And a Statement is made up of Variables, Constants, operators etc . [Read more…] about Java Tokens – What is Java Tokens?
Java Literals: A literal in java refers to a fixed value that appears directly in a program. Java define five primary types of literals. By literal we mean any number, text, or other information that represents a value. This means what you type is what you get. They are commonly known as constants. We will use literals in addition to variables in Java statement. [Read more…] about Java Literals – What is literal in Java? Type of literal
Identifiers in Java. A Java identifier is the symbolic name that is used for identification purpose. In Java, an identifier can be a variable name, constant name, method name, class name, array name, packages name or an interface. Few authors term variables as an identifier. For example : int score = 100; [Read more…] about What is an identifiers in Java? – Definition
There are times when you want to prevent inheritance. Perhaps there is no need the extensibility for various reasons. If you know this for sure, there are advantages to declaring the final keyword precisely that. [Read more…] about Final Keyword in java
Keywords are the words. Those have specifics meaning in the compiler.
Those are called keywords. There are 49 reserved keywords currently defined in the java language. These keywords cannot be used as names for a variable, class or method. Those are, [Read more…] about What is Key words?Explain Type of Keyword
Type Casting: The process of converting one data type to another is called casting. Casting is often necessary when a function returns a data of type in different form then we need to perform an operation. Under certain circumstances Type conversion can be carried out automatically, in other cases it must be “forced” manually (explicitly). For example, the read() member function of the standard input stream (System.in) returns an int. If we want to store data of type int returned by read() into a variable of char type, we need to cast it : [Read more…] about Type Casting in Java
New is a Keyword Which is used when we are Creating an object of class For Storing all the data like variables and member functions of class there is some memory Space that is to be needed So that With the help of new Keyword and Object is Instantiated or Simply an object Reserves
Some Memory or Some New Memory is Allocated to Class Object For Storing data and member functions of Class So Every Object Must be Created With the Help of New Keyword So For Allocating New Memory Area .