what does each of these options mean?

Question

java -Djava.library.path=../lib 
     -classpath ../lib/wrappertest.jar:../lib/wrapper.jar:Service.jar:../lib/mysql-connector-java-3.0.17-ga-bin.jar 
     -Dwrapper.key=Ksxtsmvr7iAmVJ-T 
     -Dwrapper.port=32001 
     -Dwrapper.jvm.port.min=31000 
     -Dwrapper.jvm.port.max=31999 -Dwrapper.pid=1731 
     -Dwrapper.version=3.3.0 
     -Dwrapper.native_library=wrapper 
     -Dwrapper.service=TRUE 
     -Dwrapper.cpu.timeout=10 
     -Dwrapper.jvmid=1 
           org.tanukisoftware.wrapper.WrapperSimpleApp com.jobirn.Service

Answer 1

-classpath tells the VM how to find classes

-Dx=y sets the system property x to value y; the exact effect depends on the property:

• java.library.path is used to find native libraries
• The rest (wrapper.*) looks like it's read by a third party library.

Answer 2

-classpath sets the class path for the JVM, i.e. the path where it will look for classes. The others (starting with -D ) all set System properties. Of these, java.library.path sets the path where the JVM will look for native libraries. The other system properties are used to configure the Java Service Wrapper product.

Answer 3

-classpath is a : separated list of directories or jar files for Java to look for classes

Each -D is an property that is being set.
java.library.path is the standard location for Java to look for its libraries, such as rt.jar
wrapper.x are most likely properties for org.tanukisoftware.wrapper.WrapperSimpleApp
These can also be set in Java using System.setProperty("property.name", "value");

org.tanukisoftware.wrapper.WrapperSimpleApp is the actual java class being run. com.jobirn.Service is the first argument to the above class and will show up as args[0], assuming the standard public static void main(String[] args)