Module for dynamically loading Java Classes using the import system.
This is a replacement for the jpype.JPackage(“com”).fuzzy.Main type syntax. It features better safety as the objects produced are checked for class existence. To use Java imports, import the domains package prior to importing a Java class.
This module supports three different styles of importing java classes.
1) Import of the package path¶
Importing a series of package creates a path to all classes contained in that package. The root package is added to the global scope. Imported packages are added to the directory of the base module.
import java mystr = java.lang.String('hello') mylist = java.util.LinkedList() path = java.nio.files.Paths.get()
2) Import of the package path as a module¶
import <java_package> as <var>
A package can be imported as a local variable. This provides access to all Java classes in that package including contained packages.
import java.nio as nio bb = nio.ByteBuffer() path = nio.file.Path()
3) Import a class from an object¶
from <java_package> import <class>[,<class>*] [as <var>]
An individual class can be imported from a java package. This supports inner classes as well.
# Import one class from java.lang import String mystr = String('hello') # Import multiple classes from java.lang import Number,Integer,Double # Import java inner class java.lang.ProcessBuilder.Redirect from java.lang.ProcessBuilder import Redirect
This method can also be used to import a static variable or method from a class. Wildcards import all packages and public classes into the global scope.
Occasionally a java class may contain a python keyword. Python keywords as automatically remapped using trailing underscore.
from org.raise_ import Object => imports "org.raise.Object"
- Non-static members can be imported but can not be called without an instance. JPype does not provide an easy way to determine which functions objects can be called without an object.