jlist.py

"""
Swing JList example in Jython.

Creates a simple list of cities and then updates a JLabel based on the
the city selected.

Greg Moore
Sept 2007
"""

# Using import * is bad form but since this is just a example I'll take the
# easy way out instead of specifing each package.
from javax.swing import JFrame
from javax.swing import JList
from javax.swing import JScrollPane
from javax.swing import JButton
from javax.swing import JLabel
from javax.swing import JPanel
from javax.swing import WindowConstants

from java.awt import BorderLayout
from java.awt import Dimension

class JListExample:

  def listSelect(self,event):
        # Process the events from the list box and update the label
    selected = self.list.selectedIndex
    if selected >= 0:
      cityName = self.data[selected]
      self.label.text = cityName

  def __init__(self):

        # These lines setup the basic frame, size and layout
        # the setDefaultCloseOperation is required to completely exit the app
        # when you click the close button
    frame = JFrame("Jython JList Example")
    frame.setSize(200, 225)
    frame.setLayout(BorderLayout())
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)

    # set up the list and the contents of the list
    # the python typle get converted to a Java vector
    self.data = ('Portland','San Francisco','Madrid','Venice','Starnberg','New York','Paris','London')
    self.list = JList(self.data)
    spane = JScrollPane()
    spane.setPreferredSize(Dimension(100,125))
    spane.getViewport().setView((self.list))

        # a panel is a bit over kill but this is a demo. :)
    panel = JPanel()
    panel.add(spane)
    frame.add(panel,BorderLayout.CENTER)

        # create the button, and city label and the show our work
        # with Jython only one line is needed create a button and attach an
        # event handler.
    btn = JButton('Select',actionPerformed=self.listSelect)
    frame.add(btn,BorderLayout.SOUTH)
    self.label = JLabel(' Select City and click select')
    frame.add(self.label,BorderLayout.NORTH)
    frame.pack()
    frame.setVisible(True)


if __name__ == '__main__':
        #start things off.
        JListExample()

run.sh

#! /bin/bash

java -cp jython-standalone-2.7.3.jar org.python.util.jython jlist.py