18.4.4.Specifying the Correct Java Type When Passing Values from Virtuoso/PL
Each method parameter in the java_new_object()
/java_call_method()
can be either the value itself
or a two-element vector. When it is a two-element vector it's first
element is the JNI type signature string, e.g.: for integer - I,
for array of integers - [I], for java.lang.String -
Ljava/lang/String. The signature is important because the Java VM
JNI API needs it in order to find the appropriate
constructor/method/property.