mirror of https://github.com/kivy/pyjnius.git
55 lines
1.5 KiB
ReStructuredText
55 lines
1.5 KiB
ReStructuredText
.. _quickstart:
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Quickstart
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==========
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Eager to get started? This page will give you a good introduction to Pyjnius. It assumes
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you have already Pyjnius installed. If you do not, head over the
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:ref:`installation` section.
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A minimal example
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-----------------
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A minimal Pyjnius example looks something like this::
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from jnius import autoclass
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Stack = autoclass('java.util.Stack')
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stack = Stack()
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stack.push('hello')
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stack.push('world')
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print stack.pop() # --> 'world'
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print stack.pop() # --> 'hello'
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Just save it as `test.py` (or something similar) and run it with your Python
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interpreter. Make sure not to call your application `jnius.py` because it would
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conflict with Pyjnius itself::
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$ python test.py
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world
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hello
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Automatic recursive inspection
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------------------------------
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Pyjnius uses Java reflection to give you a new autoclass() if the return type is
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not a native type. Let's see this example::
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System = autoclass('java.lang.System')
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System.out.println('Hello World')
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We only declared the first System class, but we are able to use all the static
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fields and methods naturally. Let's go deeper::
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>>> System = autoclass('java.lang.System')
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>>> System
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<class 'jnius.java.lang.System'>
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>>> System.out
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<java.io.PrintStream at 0x234df50 jclass=java/io/PrintStream jself=37921360>
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>>> System.out.println
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<jnius.JavaMethodMultiple object at 0x236adb8>
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The recursive reflection always gives you an appropriate object that reflects the
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returned Java object.
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