Скачать или смотреть Why Doesn’t the Java JDK Set Its Own Path After Installation on Windows?

Discover why the Java JDK may not automatically update the system path on Windows after installation and learn how to set it up manually.
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Understanding Java JDK Path Settings on Windows

Java is a widely used programming language, and many developers rely on the Java Development Kit (JDK) to compile and run Java applications. However, after installing the JDK on a Windows machine, many users encounter a common problem: the java command is not recognized in the Command Prompt (CMD). This often occurs because the Java JDK does not automatically set its path in the system environment variables. In this guide, we will delve into why this happens and how to manually set the path for your Java installation.

The Problem: Unrecognized Java Command

After installing Java SE version 14.0.1, you might attempt to check the installation by running the java command in CMD. However, an error message appears stating that CMD cannot find the command.

Reasons for the Issue Include:

No Automatic Path Configuration: The JDK installer does not configure the system path automatically.

Different Installer Providers: Various distributions of JDK may handle path settings differently depending on the vendor and the specific version.

Checking Your System Environment Variables

If you find that the Java command is not recognized, it’s a good idea to check the system environment variables:

Open the Control Panel.

Navigate to the System and Security section.

Click on System.

Select Advanced system settings and then click on Environment Variables.

Look for the Path variable in the System variables section.

Why the Path is Not Set Automatically

The reason behind this behavior often hinges on the specific JDK installation you used. Installer providers differ in their configuration practices:

Some JDK installers, like those from AdoptOpenJDK, will automatically add the PATH variable during installation, allowing the java command to work immediately.

Other distributions, such as the official Oracle JDK, may leave this task for the user, meaning you will have to do it manually.

Setting the Java Path Manually

If the Java path is not set, don’t worry! You can easily set it up manually. Here’s how:

Steps to Add Java to Your System Path:

Locate Your Java Installation Directory: By default, it should be in C:\Program Files\Java\jdk-14.0.1\bin (or your version directory).

Copy the Path: Copy the full path to the bin directory.

Access Environment Variables: Go back to the Environment Variables as outlined previously.

Edit the Path Variable:

In the System variables section, select the Path variable and click on Edit.

Click on New and paste the path of the Java bin directory.

Click OK to close all dialog boxes.

Verifying Java Installation

After setting the path, verify the installation again by opening a new CMD window and typing:

[[See Video to Reveal this Text or Code Snippet]]

If everything was set up correctly, you should see the current version of your Java installation.

Conclusion

It is crucial for developers to have the correct environment set up for their tools, and knowing why the Java JDK doesn't set its path automatically is essential to solving the problem. By following this guide, you can easily set the Java path on a Windows machine and avoid the frustrating command not recognized error in CMD. Always ensure you check your configuration settings after installation to ensure a smooth development experience.

By understanding these nuances, you can streamline your setup process and focus on what really matters: coding in Java.