Java virtual machine

1.Java virtual machine is required to interpret .class files.

2.JVM makes the java as platform independent.

One could find more information about the Java Virtual Machine online on various websites such as 'Wikipedia', 'Java-Virtual-Machine' and of course the website 'Java'.

Java virtual machine

Download virtual box by java

Java is defined by a specification and consists of a programming language, a compiler, core libraries and a runtime (Java virtual machine) The Java runtime allows software developers to write program code in other languages than the Java programming language which still runs on the Java virtual machine. The Java platform is usually associated with the Java virtual machine and the Java core libraries.

There are many places that claim to be trustworthy downloads for the Java Virtual Machine, but most of those sites can be a very big risk to the safety of one's computer. The most trustworthy vendor of the Java Virtual Machine is the Java website which also offers downloads to the latest updated versions of the JDK and other Java products.

The Java platform, which consists 3 major parts: Java programming language, Java Virtual Machine (JVM), and several Java Application Programming Interfaces (APIs), was developed at Sun Microsystems in the early 1990s.

You will no longer be able to run Java programs.

Java byte code is the code that is output by the Java compiler. Byte code is not machine code, it must be interpreted to create the machine code. This is handled by the Java virtual machine. Pretty much every platform produced today has a Java virtual machine implementation, so the same byte code can be executed upon any machine. Byte code can be regarded as being the native language of the virtual machine, as opposed to machine code which is the native language of the physical machine.

A Java Virtual Machine enables a set of computer software programs and data structures to use a virtual machine model for the execution of other computer programs and scripts. The model used by a JVM accepts a form of computer intermediate language commonly referred to as Java bytecode.

A virtual machine is a software implementation of a machine (i.e. a computer) that executes instructions (not programs) like a physical machine.

yes its a programing tool.

Because it will work on all platforms because it's code is compiled through it's on Virtual Machine, the JVM (Java Virtual Machine).

JVM stands for Java Virtual Machine

The JVM is the system in which our Java programs are executed.

You must have the Java Run-time Environment installed on your computer.

Steps:

1. Open Command Prompt

2. Enter the command: javac class.java

3. Enter the command: java <classfilename> (without the .java or .class extension)

The javac command will compile your java source file and create a class file. The java command will execute or run your java class file.

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This is because Java runs it's code through a Virtual Machine which compiles it and runs it.

C will compile native on your machine and the code will be run directly, without the use of a virtual machine.

Modern machines do not consist of multiple levels of virtual machines; that is a function of the host operating system's virtual machine manager and its guest operating systems, all of which are implemented through software. The operating system's virtual machine manager exposes one or more virtual machines upon which you can host one or more guest operating systems and their applications. In order to execute compiled Java applications upon one of these guest operating systems you will also need to install the Java virtual machine for that specific operating system. Thus you end up with a Java program executing within a Java virtual machine executing within a virtual machine executing within a virtual machine manager executing upon the physical hardware. The physical hardware itself may be optimised to handle virtual machine managers more efficiently, but the virtual machine manager is a software program; it is not part of the physical machine architecture

In stack

True

No you have to install it and it is platform dependent.

JVM stands for Java Virtual Machine, it is software.

A compiler converts high-level source code into native machine. In the case of Java, source code is compiled to Java byte code suitable for interpretation by the Java virtual machine which produces the machine code.

It is simply called the Java compiler. The actual program is usually called Javac.

Programs that are specifically designed with Java require a Java runtime to work on a computer. (In the case of Java, the runtime is called "Java Virtual Machine".) If you have any such program, you need to have Java.

JVM is a critical component in almost all Java platforms. I would hardly define it as "dangerous".

J2ME - Java 2 Micro Edition is generally used in java enabled phones. Simple Java Applications use JVM(Java Virtual Machine) for generating bytecode where as Java Mobile Applications use KVM(KiloByte Virtual Machine) for the same purpose. Reason for this is KVM occupies small amount of memory and hence can be embedded inside a java enabled phone easily.

JVM Stands for Java Virtual Machine. JVM is the virtual machine in which a java program gets executed.

JRE stands for Java Runtime Environment. JRE is the runtime set up that is required by the JVM to execute java programs.

JDK stands for Java Development Kit. JDK is the basic software that gets downloaded from sun's java website if anyone wants to use java.

Java created a file called class, and is identified by having the .class at the end. This file includes a Java bytecode, which then can be used on the Java Virtual Machine.

Java Classpath is a parameter that tells the Java Virtual Machine or the Java Compiler, where to search for user-defined classes and packages on a computer.

That's short for Software Development Kit, and it is basically everything the programmer (developer) needs to program in Java. It includes the Java compiler, the Java Virtual Machine, and the Java base classes.

A Java Virtual Machine (JVM) is a set of computer software programs that use a virtual machine model for the execution of Java computer programs and scripts.

The JVM accepts data in a form commonly referred to as Java bytecode. This language conceptually represents the instruction set of a stack-oriented, capability architecture.

Windows, Solaris, Linux, & Apple OSX...

The JRE refers to Java Runtime Environment... JRE is an implementation of the Java Virtual Machine which actually executes Java programs. Without the JRE we cannot execute our Java programs.

The whole idea of Java - or one of the ideas, at any rate - is that it can be run anywhere. So, instead of compiling for a specific processor, the Java compiler compiles for a "generic processor", called the Java Virtual Machine. The code thus generated is called "bytecode". It can be interpreted (i.e., run) by a Java Virtual machine, these are available on different platforms.

The whole idea of Java - or one of the ideas, at any rate - is that it can be run anywhere. So, instead of compiling for a specific processor, the Java compiler compiles for a "generic processor", called the Java Virtual Machine. The code thus generated is called "bytecode". It can be interpreted (i.e., run) by a Java Virtual machine, these are available on different platforms.

The whole idea of Java - or one of the ideas, at any rate - is that it can be run anywhere. So, instead of compiling for a specific processor, the Java compiler compiles for a "generic processor", called the Java Virtual Machine. The code thus generated is called "bytecode". It can be interpreted (i.e., run) by a Java Virtual machine, these are available on different platforms.

The whole idea of Java - or one of the ideas, at any rate - is that it can be run anywhere. So, instead of compiling for a specific processor, the Java compiler compiles for a "generic processor", called the Java Virtual Machine. The code thus generated is called "bytecode". It can be interpreted (i.e., run) by a Java Virtual machine, these are available on different platforms.

Jython is a version of the Python programming language that is integrated with the Java programming language, allowing you to mix Java and Python code and run both on the Java Virtual Machine.

Garbage collection prevents memory leaks. In Java, the Java Virtual Machine will garbage collect whenever there is memory that has no references.

A JVM, or Java Virtual Machine, creates the environment in which programs that run using Java bytecode are processed. It does not itself possess bytes or bytecode.

The JRE refers to Java Runtime Environment... JRE is an implementation of the Java Virtual Machine which actually executes Java programs. Without the JRE we cannot execute our Java programs.

Although Java is often described as a compiled language, it is a language that is both compiled and interpreted. Unlike C++ which typically compiles to native machine code, Java compiles to Java byte code, the native language of the Java virtual machine. The key difference here is that the Java virtual machine is not machine dependent, thus the same byte code can be executed upon any physical machine with a suitable Java virtual machine implementation; it is highly portable. Machine code can only be executed upon the machine architecture for which it was compiled. To support other architectures, the source code must be recompiled for those architectures.

In terms of execution, native machine code requires no further translation and can be executed as soon as the code is compiled successfully (including any and all shared libraries required by the executable). Java byte code requires that the Java virtual machine be memory-resident during execution as the byte code must be interpreted to produce native machine code while the byte code is executing within the virtual machine.

In terms of memory consumption, C++ programs require no additional memory over and above the program's requirements. Java programs require additional memory for the Java virtual machine runtime. Java programs also consume additional memory to assist in memory management, such as automatic garbage collection. C++ programs manage their own memory using resource handles and smart pointers; the use of a garbage collector is optional.

In terms of performance, C++ programs execute many times more quickly than equivalent Java programs due to Java's need to interpret the byte code.

No, the Java is not machine language. Java is a high-level programming language that compiles to byte code suitable for interpretation into machine code by the Java virtual machine. In other words, you program the virtual machine rather than the physical machine. Once compiled, the byte code can be executed upon any machine with a Java virtual machine implementation.

Yes.

No. Java programs run in the Java Virtual Machine (JVM) - without it your computer won't know how to handle Java bytecode.

It is partial with opcode and processor code. It is meaningless when we see it on our eyes, but it provides info instructions to Java Virtual Machine to execute that.

You need to install java. If you've already done that, try to reinstall it.

That's because that's the way Java is designed. Java programs are compiled to be run on a special program that interprets it - the Java Virtual Machine. The reason it is designed this way is because it allows Java programs to run on just about any computer - despite the fact that different computers have different sets of machine instructions. It is well possible to write programs that run without requiring support of specific programs - but such programs will only run on specific computers.

The -server flag for java in the jdk 1.3 selects the Java HotSpot Server Virtual Machine (as opposed to the default Client Virtual Machine). This VM is more optimized for long-running server-type programs, as opposed to short-running clients.

In java need main() method. without main() in java we won't run the java programe

main() signals the entry point to the program - it tells the Java Virtual Machine which is the first program that should be executed.