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What exactly does JVM mean? I believe that many inexperienced people can do nothing about it. Therefore, this article summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

JVM is the abbreviation of JavaVirtualMachine, which means Java virtual machine. It has its own perfect hardware architecture, such as processor, stack, register, etc., as well as the corresponding instruction system.

What does JVM mean?

JavaVirtualMachine (Java Virtual Machine), which is a fictional computer, is realized by simulating various computer functions on the actual computer. Java virtual machine has its own perfect hardware architecture, such as processor, stack, register and so on, as well as the corresponding instruction system. JVM shields the information related to the specific operating system platform, so that Java programs only need to generate the object code (bytecode) running on the Java virtual machine, and can run on a variety of platforms without modification. When the Java virtual machine executes the bytecode, it actually interprets the bytecode as the execution of machine instructions on the specific platform.

JVM (Java Virtual Machine) is a specification for computing devices that can be implemented in different ways (software or hardware). Compiling a virtual machine's instruction set is very similar to compiling a microprocessor's instruction set. The Java virtual machine includes a set of bytecode instructions, a set of registers, a stack, a garbage collection heap, and a storage method domain.

The Java virtual machine (JVM) is a hypothetical computer that can run Java code. As long as you port the interpreter to a specific computer according to the JVM specification, you can guarantee that any compiled Java code will run on that system.

The Java virtual machine is an imaginary machine, which is realized by software simulation on the actual computer. The Java virtual machine has its own imaginary hardware, such as processors, stacks, registers, etc., as well as corresponding instruction systems.

1. Why use the Java virtual machine

A very important feature of Java language is its platform independence. The use of Java virtual machine is the key to realize this feature. If a general high-level language is to run on different platforms, it needs to at least be compiled into different object code. After introducing the Java language virtual machine, the Java language does not need to be recompiled when it runs on different platforms. The Java language uses the pattern Java virtual machine to shield the information related to the specific platform, so that the Java language compiler only needs to generate the object code (bytecode) running on the Java virtual machine and can run on a variety of platforms without modification. When executing the bytecode, the Java virtual machine interprets the bytecode as the execution of machine instructions on the specific platform.

two。 Who needs to know about the Java virtual machine

The Java virtual machine is the basis of the underlying implementation of the Java language, and anyone interested in the Java language should have a general understanding of the Java virtual machine. This helps to understand some of the nature of the Java language, as well as to use the Java language. For the software personnel who want to implement the Java virtual machine on a specific platform, the compiler writers of the Java language and those who want to implement the Java virtual machine with hardware chips, they must have a deep understanding of the specification of the Java virtual machine. In addition, if you want to extend the Java language, or compile other languages into Java bytecode, you also need to learn more about the Java virtual machine.

After reading the above, have you mastered the method of exactly what JVM means? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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