How to Check the JDK Version Installed on Oracle?

How can I verify the version of the JDK installed on my Oracle system?

java -version

Verifying the JDK (Java Development Kit) version is crucial for ensuring that your applications run with the correct functionalities and features. Here, we outline step-by-step methods to check the JDK version on an Oracle system.

// Command to check JDK version
java -version

// Example Output:
// java version "1.8.0_241"
// Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
// Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)

Causes

• The JDK version may affect compatibility with Java applications.
• Different versions of JDK introduce various features, bug fixes, and performance improvements.

Solutions

• Open a command prompt or terminal window and type `java -version` to check the installed JDK version.
• Alternatively, use the `javac -version` command to verify the JDK's compiler version.

Mistake: Running the command in a directory without Java in the PATH variable.

Solution: Ensure that the PATH environment variable includes the path to the JDK's bin directory.

Mistake: Using `jdk -version` instead of `java -version`.

Solution: Always use `java -version` or `javac -version` commands to retrieve the JDK version.