% /usr/libexec/java_home -v 1.8.0_06 -exec javac -versionįor more information, see the java_home(1) man page. To run a different version of Java, either specify the full path, or use the java_home tool: Java HotSpot(TM) 64-Bit Server VM (build 23.2-b04, mixed mode) Java(TM) SE Runtime Environment (build 1.8.0_06-ea-b13) If the installed version is 8u6, you will see a string that includes the text 1.8.0_06. You can determine which version of the JDK is the default by typing java -version in a Terminal window. It is possible for the version of the JRE to be different than the version of the JDK. When launching a Java application through the command line, the system uses the default JDK.

There can be multiple JDKs installed on a system, as many as you wish. In Java the Mac class of the javax.crypto package provides the functionality of message authentication code. The process of using MAC for authentication is depicted in the following illustration. See 'Note for Users of OS X that Include Apple Java 6 Plug-in'. Essentially, a MAC is an encrypted checksum generated on the underlying message that is sent along with a message to ensure message authentication. If you have not yet installed Apple's Java OS X 2012-006 update, then you are still using a version of Apple Java 6 that includes the plug-in and the Java Preferences app. Determining the Default Version of the JDK