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This article mainly introduces "what is Java's operating mechanism". In daily operation, I believe many people have doubts about what Java's operating mechanism is. Xiaobian consulted all kinds of materials and sorted out simple and easy operation methods. I hope to help you answer your doubts about "what is Java's operating mechanism"! Next, please follow the small series to learn together!

Java programs run in two steps: compile and run. First, compile the source file with suffix name ".java", and finally generate byte code file with suffix name ".class". The Java Virtual Machine then interprets and executes the compiled bytecode file and displays the final result.

The following is an example of how Java works.

Write a Java program, such as helloworld.java file.

2. Use "javac hello world.java" command to open Java compiler and compile. After compilation, a bytecode file of hello world.class is automatically generated.

3. Use the "java hello world" command to start the Java virtual machine running program. The Java virtual machine first loads the compiled bytecode file into memory. This process is what we often call class loading, which is completed by a class loader. Then the virtual machine interprets and executes the loaded Java class, and you can see the running results.

In this process, we can see that Java programs actually have virtual machines responsible for interpretation and execution, not other languages that need to rely on operating system interpretation. This reflects the characteristics of Java, that is, cross-platform operation. That is, the same program can be written for different operating systems, and only the corresponding version of the virtual machine needs to be installed in the operating system. This feature of "write once, export and run" effectively solves the problem that programming languages produce different machine codes when compiling different operating systems, thus greatly reducing the cost of program development and maintenance.

At this point, the study of "what is Java's operating mechanism" is over, hoping to solve everyone's doubts. Theory and practice can better match to help you learn, go and try it! If you want to continue learning more relevant knowledge, please continue to pay attention to the website, Xiaobian will continue to strive to bring more practical articles for everyone!

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