What is java written in?
What is java written in?
JAVA itself is a programming language, which is compiled and generated The file runs on the JVM (java virtual machine). JVM is developed by c language and assembly language. Based on this is java, and the virtual machine plays the role of parsing and execution.
JVM is the biggest feature of the Java language. The advantages and disadvantages of Java are also due to JVM technology. JVM is a virtual computer system that can run Java bytecode. It has an interpreter component that enables communication between Java bytecode and the computer's operating system.
Also includes a set of registers, a stack, a garbage collection heap and a storage method field. The JVM shields the information related to the specific operating system platform, so that the Java program only needs to generate bytecode to run on the Java virtual machine, and it can run on multiple platforms without modification. This is also the biggest feature of Java, its cross-platform nature, that is, it can be written in one place and run anywhere.
When the JVM executes bytecode, it actually ultimately interprets the bytecode into machine instructions for execution on the specific platform. Compiling the instruction set for a virtual machine is very similar to compiling the instruction set for a microprocessor. This is one of the most criticized aspects of Java. Running on the JVM is of course not as fast as running directly on the operating system. So some people always say that Java's running speed is not as fast as C language.
php Chinese website, a large number of free Java introductory tutorials, welcome to learn online!
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