Is there a difference between the -cp and -classpath options?

When I'm using -classpath in example 1 to execute my java application from another directory, it shows error unsatisfied link error. such as

error: 
java.lang.UnsatisfiedLinkError: no <java main classname> in java.library.path

example1:

java -Djava.library.path=. -classpath ".:<.jar files path>:</java application directory/>" <java main class name>

But when I run example2 command in any random directory in the /home/root/, it is running my java application.

example2:

java -Djava.library.path=. -cp ".:<.jar files path>:</java application directory/>" <java main class name>

hence I just want to what is the difference between -classpath and -cp.

My code example

class enGraph{
static {

        /*
         * Load native library libepdgraph.so (Unixes) at runtime This library contains
         * a native method called button()
         */
        File lib = new File("/home/root/" + System.mapLibraryName("enGraph"));
        System.load(lib.getAbsolutePath());


    }
}