Simple Operation Guide: Overview of Java Virtual Machine Installation Steps

Java Virtual Machine Installation Guide: List of Simple Steps

Introduction: Java Virtual Machine (Java Virtual Machine, referred to as JVM) is the running environment of Java programs. Source code is compiled into bytecode and executed as the core component. This article will provide you with a simple JVM installation guide to help you quickly install and configure the JVM environment.

1. Download the JVM installation package
Before installing the JVM, you need to download the JVM installation package file suitable for your operating system. It is recommended to download the latest version of the JVM installation package from the Oracle official website. Depending on your operating system, select the correct version and click Download.

2. Install JVM to your computer
After the download is completed, double-click the installation package file and follow the instructions of the installation wizard to complete the JVM installation process. During the installation process, you can choose the installation path of the JVM as well as some other options. In general, it is recommended to use the default options to complete the installation.

3. Configure JVM environment variables
After the installation is complete, you need to configure the JVM environment variables so that the system can correctly identify and use the JVM. The following are the steps to configure JVM environment variables:

1. Open the "Control Panel" and find the "System and Security" option.
2. Click the "System" option and then select "Advanced System Settings".
3. In the pop-up window, click the "Advanced" tab, and then click the "Environment Variables" button.
4. In the "System Variables" column, find the variable named "Path" and click the "Edit" button.
5. In the edit variable window, click the "New" button and enter the installation path of the JVM (for example: C:Program FilesJavajdk1.8.0_281 in).
6. Click the "OK" button to save changes.

4. Verify whether the JVM installation is successful
After completing the configuration of the JVM environment variables, you can verify whether the JVM installation is successful in the following ways:

1. Open the command prompt prompt window (in Windows operating systems, it can be opened by searching for "Command Prompt" in the Start menu).
2. Enter the command "java -version" and press the Enter key.
3. If the JVM version information is displayed in the command prompt window, it means that the JVM has been successfully installed and configured.

At this point, you have successfully installed and configured the JVM.

Appendix: Java Hello World sample code

The following is a simple Java Hello World sample code for you to test the operation of the JVM.

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

You can compile and run this sample code through the following steps:

1. Create a new text file, copy the above code into the file, and save it as HelloWorld.java .
2. Open the command prompt window and enter the directory where the HelloWorld.java file is saved.
3. Enter the command "javac HelloWorld.java" to compile the Java source file.
4. Enter the command "java HelloWorld" to run the compiled bytecode file.
5. If "Hello, World!" is displayed in the command prompt window, it means that the JVM successfully ran the sample code.

Summary:
This article provides you with a simple JVM installation guide to help you quickly install and configure the JVM environment. By following the steps in the guide, you can successfully install the JVM and verify that the installation of the JVM was successful. I hope this article is helpful to you, and I wish you a happy use of JVM!

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