###Understanding Java Version Queries

Java provides specific command-line options to check the installed version. The output can vary slightly based on the Java vendor (Oracle, OpenJDK, etc.) but generally follows a consistent format displaying the version, runtime environment, and VM information.

Here's a concise key/value pair list of commands you might use to query Java version information, along with the expected type of output for each:

• java -version: This is the correct and standard command to get the Java version, the runtime environment, and VM details. Expected output: Detailed version information.

• java --version: This is essentially the same as java -version and is accepted by newer versions of Java as a valid command. Expected output: Detailed version information, similar to java -version.

• java -v: Expected output: This command is not recognized by Java, and you will likely receive an error message indicating an unrecognized option.

• java --v: Expected output: Similar to java -v, this is not a recognized command in Java, and you will receive an error message.

The commands java -v and java --v do not provide version information because they are not recognized syntax for querying Java version details. The standardized commands across most Java versions and distributions for obtaining version information are java -version and java --version.