How to check Java version in command prompt?

How to Check Java Version in Command Prompt

Introduction

Java is a popular programming language used for developing a wide range of applications, from small scripts to complex enterprise-level systems. As a developer, it’s crucial to know which version of Java is installed on your system, especially when working on a project that requires a specific version. In this article, we will outline the steps to check Java version in the command prompt.

How to Check Java Version in Command Prompt?

There are several ways to check Java version in the command prompt. Here are the most common methods:

• Method 1: Using the java -version Command

  • Open the Command Prompt: Press the Windows key + R to open the Run dialog box, type cmd, and press Enter to open the Command Prompt.
  • Type the following command and press Enter: java -version
  • The output will display the Java version installed on your system.

**Java version "1.8.0_144"

Method 2: Using the java -full-version Command

• Open the Command Prompt: Press the Windows key + R to open the Run dialog box, type cmd, and press Enter to open the Command Prompt.
• Type the following command and press Enter: java -full-version
• The output will display the full version of Java installed on your system, including the build number and revision.

**Java 1.8.0_144-b01

Method 3: Using the javac -version Command (For Java Development)

• Open the Command Prompt: Press the Windows key + R to open the Run dialog box, type cmd, and press Enter to open the Command Prompt.
• Type the following command and press Enter: javac -version
• The output will display the version of the Java Compiler (javac) installed on your system.

**Java 1.8.0 (build 144-b01)

Additional Tips and Troubleshooting

• Java is not installed: If you haven’t installed Java on your system, you can download and install it from the official Oracle website.
• Java version not recognized: If the java -version command doesn’t recognize Java, try checking your system’s PATH environment variable. You can do this by typing set in the Command Prompt and pressing Enter.
• Unsupported Java version: If the installed Java version is no longer supported, you may need to update to a newer version or use a different version of Java for your project.

Conclusion

In conclusion, checking Java version in the command prompt is a straightforward process. You can use the java -version, java -full-version, or javac -version commands to display the Java version installed on your system. Remember to update your Java installation regularly to ensure you have the latest security patches and features. By following these steps, you’ll be able to troubleshoot any issues related to Java version in your development workflow.