Shulou(Shulou.com)06/03 Report--

Today, I will talk to you about how to have a comprehensive understanding of JVM technology, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.

The concept of JVM

The JVM (Java virtual machine) 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.

Introduction to JVM

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. JVM includes a set of bytecode instructions, a set of registers, a stack, a garbage collection heap, and a storage method field. The JVM (Java virtual machine) 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. JVM is an imaginary machine, which is realized by software simulation on a real computer. JVM has its own imaginary hardware, such as processors, stacks, registers, etc., as well as a corresponding instruction system.

Characteristics of JVM

A very important feature of Java language is its platform independence. The use of JVM is the key to achieve 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 JVM 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 JVM and can run on a variety of platforms without modification. When executing the bytecode, JVM interprets the bytecode as the execution of machine instructions on a specific platform.

JVM is the foundation of the underlying implementation of the Java language, and anyone interested in the Java language should have a general understanding of JVM. 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 JVM on a specific platform, the compiler writers of Java language, and those who want to implement JVM with hardware chips, they must have a deep understanding of JVM specifications. In addition, if you want to extend the Java language, or compile other languages into Java bytecode, you also need to know more about JVM.

After reading the above, do you have any further understanding of how to have a comprehensive understanding of JVM technology? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.