Java not print "Unrecognized option" when it is invalid option.

Java not print "Unrecognized option: ...
Could not create the Java virtual machine" if random character set follow in some valid X option.
For example
"java -Xcomputer", "java -XproffessionalismOfOurEngineer", "java -XinterviewWithVampire", "java -XmixedVeryHardMixed!!!Oh!CanIDosomething?" is correct!
After those command java help is printed.

Example 2:
>java -XcompilationError!GameOver,Baby! -version
java version "1.5.0_10"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_10-b03)
Java HotSpot(TM) Client VM (build 1.5.0_10-b03, compiled mode, sharing)

But
"java -XfutureSSS" is incorrect. The next message will be print:
Unrecognized option: -XfutureSSS
Could not create the Java virtual machine."

Is it correct behavior?

It was checked on 1.5.0, 1.4.2 JDK versions.