###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 asjava -version
and is accepted by newer versions of Java as a valid command. Expected output: Detailed version information, similar tojava -version
.