bash-3.2$ java -ver
Unrecognized option: -ver
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
If you are trying to check the Java version on Mac OS X (Lion, Mavericks or Yosemite) and you get the above error message then it may be so that you are specifying the command wrong, let's try java -help
bash-3.2$ java -help Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) where options include: -d32 use a 32-bit data model if available -d64 use a 64-bit data model if available -server to select the "server" VM The default VM is server, because you are running on a server-class machine. -cp
-classpath A : separated list of directories, JAR archives, and ZIP archives to search for class files. -D = set a system property -verbose:[class|gc|jni] enable verbose output -version print product version and exit -version: require the specified version to run-showversion print product version and continue -jre-restrict-search | -no-jre-restrict-search include/exclude user private JREs in the version search -? -help print this help message -X print help on non-standard options -ea[: ...|: ] -enableassertions[: ...|: ] enable assertions with specified granularity -da[: ...|: ] -disableassertions[: ...|: ] disable assertions with specified granularity -esa | -enablesystemassertions enable system assertions -dsa | -disablesystemassertions disable system assertions -agentlib: [= ] load native agent library , e.g. -agentlib:hprof see also, -agentlib:jdwp=help and -agentlib:hprof=help -agentpath: [= ] load native agent library by full pathname -javaagent: [= ] load Java programming language agent, see java.lang.instrument -splash: show splash screen with specified image
so the correct argument to check java version is -version
bash-3.2$ java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
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