Java Objects in the Wolfram Language
LoadJavaClass — load and set up a Java class for use from the Wolfram Language
JavaClass — expression that represents a Java class
JavaNew — create a Java object of a specified class
JavaObject — expression that represents a Java class
MakeJavaObject , MakeJavaExpr — create a Java object that represents an expression
Constructors , Methods , Fields — information about classes
JavaObjectQ — whether an expression is a valid Java object reference
InstanceOf — whether an object is an instance of a certain class or interface
SameObjectQ — whether two JavaObject expressions reference the same Java object
LoadedJavaObjects , LoadedJavaClasses — list all Java objects or classes in use
ClassName — get the fully qualified name of a class
GetClass , ParentClass — get the JavaClass representing a Java object's class or parent class
ReturnAsJavaObject — return an object reference instead of its value
JavaObjectToExpression — convert an object reference into its value
ImplementJavaInterface — implement a Java interface via callbacks to the Wolfram Language