Swing Exception

SwingExceptionTest.rb

include Java

java_import javax.swing.JScrollPane
java_import javax.swing.JTree
java_import javax.swing.UIManager
java_import javax.swing.WindowConstants
def create_and_show_GUI
  # try{
  #   UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  # }catch(Exception e) { e.printStackTrace(); }
  begin
    UIManager.look_and_feel = UIManager.system_look_and_feel_class_name
  rescue Exception => e
    proxied_e = JavaUtilities.wrap e.cause
    proxied_e.print_stack_trace
  end
  frame = javax.swing.JFrame.new "Title"
  frame.default_close_operation = WindowConstants::EXIT_ON_CLOSE
  frame.content_pane.add JScrollPane.new(JTree.new)
  frame.set_size(320, 240)
  frame.location_relative_to = nil
  frame.visible = true
end
def run
  create_and_show_GUI
end
java.awt.EventQueue.invokeLater self