headius (owner)

Revisions

gist: 208911 Download_button fork
public
Public Clone URL: git://gist.github.com/208911.git
Embed All Files: show embed
1. Duby source #
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import javax.swing.JFrame
import javax.swing.JButton
import java.awt.event.ActionListener
 
frame = JFrame.new "Welcome to Duby"
frame.setSize 300, 300
frame.setVisible true
 
button = JButton.new "Press me"
frame.add button
frame.show
 
class AL; implements ActionListener
  def initialize; end
  def actionPerformed(event)
    JButton(event.getSource).setText "Duby Rocks!"
  end
end
 
button.addActionListener AL.new
2. Bytecode output #
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Compiled from "swing.duby"
public class swing extends java.lang.Object{
public static void main(java.lang.String[]);
  Code:
   0:	new	#9; //class javax/swing/JFrame
   3:	dup
   4:	ldc	#11; //String Welcome to Duby
   6:	invokespecial	#15; //Method javax/swing/JFrame."<init>":(Ljava/lang/String;)V
   9:	astore_1
   10:	aload_1
   11:	sipush	300
   14:	sipush	300
   17:	invokevirtual	#19; //Method javax/swing/JFrame.setSize:(II)V
   20:	aload_1
   21:	iconst_1
   22:	invokevirtual	#23; //Method javax/swing/JFrame.setVisible:(Z)V
   25:	new	#25; //class javax/swing/JButton
   28:	dup
   29:	ldc	#27; //String Press me
   31:	invokespecial	#28; //Method javax/swing/JButton."<init>":(Ljava/lang/String;)V
   34:	astore_2
   35:	aload_1
   36:	aload_2
   37:	invokevirtual	#32; //Method javax/swing/JFrame.add:(Ljava/awt/Component;)Ljava/awt/Component;
   40:	pop
   41:	aload_1
   42:	invokevirtual	#36; //Method javax/swing/JFrame.show:()V
   45:	aload_2
   46:	new	#38; //class AL
   49:	dup
   50:	invokespecial	#40; //Method AL."<init>":()V
   53:	invokevirtual	#44; //Method javax/swing/JButton.addActionListener:(Ljava/awt/event/ActionListener;)V
   56:	return
 
public swing();
  Code:
   0:	aload_0
   1:	invokespecial	#51; //Method java/lang/Object."<init>":()V
   4:	return
 
}
 
Compiled from "swing.duby"
public class AL extends java.lang.Object implements java.awt.event.ActionListener{
public AL();
  Code:
   0:	aload_0
   1:	invokespecial	#11; //Method java/lang/Object."<init>":()V
   4:	return
 
public void actionPerformed(java.awt.event.ActionEvent);
  Code:
   0:	aload_1
   1:	invokevirtual	#21; //Method java/awt/event/ActionEvent.getSource:()Ljava/lang/Object;
   4:	checkcast	#23; //class javax/swing/JButton
   7:	ldc	#25; //String Duby Rocks!
   9:	invokevirtual	#29; //Method javax/swing/JButton.setText:(Ljava/lang/String;)V
   12:	return
 
}
 
3. (J)Ruby equivalent #
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import javax.swing.JFrame
import javax.swing.JButton
import java.awt.event.ActionListener
 
frame = JFrame.new "Welcome to Duby"
frame.set_size 300, 300
frame.visible = true
 
button = JButton.new "Press me"
frame.add button
frame.show
 
class AL; include ActionListener
  def actionPerformed(event)
    event.source.text = "Duby Rocks!"
  end
end
 
button.add_action_listener AL.new