Found 9344 Articles for Object Oriented Programming

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. Thus when you write a piece of Java code in a particular platform and generated an executable code .class file. You can execute/run this .class file on any system the only condition is that the target system should have JVM (JRE) installed in it. In short, Java compiler generates an architecture-neutral ... Read More

Java runs on operating systems such as Windows, Mac OS, and the various versions of UNIX/Linux like HP-Unix, Sun Solaris, Redhat Linux, Ubuntu, CentOS, etc.

Java Standard Edition provides 14 packages namely –applet − This package provides classes and methods to create and communicate with the applets.awt− This package provides classes and methods to create user interfaces.beans− This package contains classes and methods to develop components based on java beans. io− This package contains classes and methods to read and write data standard input and output devices, streams and files.lang− This package contains the fundamental classes, methods, and, interfaces of Java language.math− This package contains classes and methods which helps you to perform arithmetic operations using the Java language.net− This package provides classes to implement networking ... Read More

A fully object-oriented language needs to have all the 4 oops concepts. In addition to that, all predefined and, user-defined types must be objects and, all the operations should be performed only by calling the methods of a class.Though java follows all the four object-oriented concepts,Java has predefined primitive data types (which are not objects).You can access the members of a static class without creating an object of it.Therefore, Java is not considered as fully object-oriented Technology.

Java Virtual machine is the program which accepts .class files as input and converts this to system executable code.The class loader is a module in JVM it loads, links and, initialize a program.Loads the class into the memory.Verifies the byte code instructions.Allocates memory for the program.

Maven is a build tool which is based on the concept of a project object model (POM), Maven can manage a project's build, reporting, and documentation from a central piece of information. Using maven, we can build and manage any Java-based project. In case of multiple development teams environment, Maven can set-up the way to work as per standards in a very short time. As most of the project setups are simple and reusable, Maven makes a life of developer easy while creating reports, checks, build and testing automation setups. Maven provides developers with ways to manage the following: ... Read More

Java Virtual Machine is an abstract computing machine which is used to run the java program. JVM accepts byte code, loads it and translates it into system understandable code.

Java uses javac (compiler) to convert the java code to byte code (.class file). Then, JVM internally converts the byte code to system understandable code using the interpreter in addition to it JVM. Instead of executing a piece of code, again and again, JVM identifies them as “hot spots” and compiles them using Just in time compiler and, later reuses the same when required. Just in Time compiler is a compiler which is used by JVM internally to translate the hot spots in the byte code to machine understandable code. The main purpose of JIT compiler is to do heavy ... Read More

Download the latest version of Java from the official site. Run the .exe to install Java on your machine. Once you installed Java on your machine, you will need to set environment variables to point to correct installation directories −Setting Up the Path for Windows:Assuming you have installed Java in c:\Program Files\java\jdk directory − Right-click on 'My Computer' and select 'Properties'.Click the 'Environment variables' button under the 'Advanced' tab.Now, alter the 'Path' variable so that it also contains the path to the Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.Read More

Java uses javac (compiler) to convert the java code to byte code (.class file).When we run this code using JVM, it internally converts the byte code to system understandable code using an interpreter.Instead of executing a piece of code, again and again, JVM identifies them as “hot spots” and compiles them using Just in time compiler and, later reuses the same when required.A compiler compiles (translates) the given program to executable code (whole code at a time).A JIT compiler performs a similar task but it is used by JVM internally, to translate the hotspots in the byte code.A compiler compiles ... Read More