The -only option added to the extract.sh script allows you to specify that the installation procedure stops with the unzipping of the required system files. When you use the -only option with extract.sh, you need to run the installer script to continue the installation. In this case, the JVM version test is done when you run installer.
In addition, the following extract.sh options are supported:
-nodisplay : Runs the install without a graphic user interface.
-noconsole : When used with the -nodisplay option, performs the default product install unless it was modified by the -locales options
-debug : Displays extra information about what the install is doing. Mainly for installation diagnostic purposes
-keep : Does not remove the uncompressed files and the installer shell script.
-help : Gives information on usage.