diff --git a/bin/GUI/ButtonListener.class b/bin/GUI/ButtonListener.class
index 3bad10c..5e05f10 100644
Binary files a/bin/GUI/ButtonListener.class and b/bin/GUI/ButtonListener.class differ
diff --git a/bin/GUI/GUI1.class b/bin/GUI/GUI1.class
index ed02c4a..095518a 100644
Binary files a/bin/GUI/GUI1.class and b/bin/GUI/GUI1.class differ
diff --git a/bin/GUI/GUI2.class b/bin/GUI/GUI2.class
index 1924fb4..c550513 100644
Binary files a/bin/GUI/GUI2.class and b/bin/GUI/GUI2.class differ
diff --git a/bin/GUI/Listener.class b/bin/GUI/Listener.class
index 180cf01..7e3c259 100644
Binary files a/bin/GUI/Listener.class and b/bin/GUI/Listener.class differ
diff --git a/src/GUI/GUI1.java b/src/GUI/GUI1.java
index bbefa25..04024be 100644
--- a/src/GUI/GUI1.java
+++ b/src/GUI/GUI1.java
@@ -8,36 +8,43 @@ import java.awt.FlowLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 
+
+/**
+ * main class for create the window
+ */
 public class GUI1 extends JFrame {
     public static void main(String[] args) {
         new GUI1();
     }
-
     GUI1(){
+        //set up the window
         setTitle("Me");
         setSize(200,200);
         setLocation(600,200);
+        this.getContentPane().setBackground(Color.GREEN);
 
+        //set the layout for the window
         FlowLayout fl = new FlowLayout();
 		this.setLayout(fl);
 
-        this.getContentPane().setBackground(Color.GREEN);
-
+        //create and add component on the window
         JButton jb1 = new JButton("Foo");
         JButton jb2 = new JButton("bar");
-
         ButtonListener bl = new ButtonListener(this);
 		jb1.addActionListener(bl);
         jb2.addActionListener(bl);
-
-
         this.add(jb1);
         this.add(jb2);
 
+
         this.setVisible(true);
 
     }
 }
+
+/**
+ * set up the class for detect button
+ */
 class ButtonListener implements ActionListener{
 	JFrame f1;
 	
diff --git a/src/GUI/GUI2.java b/src/GUI/GUI2.java
index c192df3..aad4fb6 100644
--- a/src/GUI/GUI2.java
+++ b/src/GUI/GUI2.java
@@ -7,57 +7,53 @@ import javax.swing.event.ChangeListener;
 import java.awt.Container;
 
 /**
- * 
+ * main class for create the window
  */
 public class GUI2 extends JFrame{
     int number;
     public static void main(String[] args) {
         new GUI2();
     }
-
-    /**
-     * 
-     */
     GUI2(){
+        //set up the window with the layout
         setSize(200,200);
         setLocation(600,200);
         Container c = this.getContentPane();
         BoxLayout fl = new BoxLayout(c, BoxLayout.Y_AXIS);
 		c.setLayout(fl);
 
+        //create component on the window
         JSlider js1 = new JSlider(0, 100);
         js1.setValue(0);
         JProgressBar jp1 = new JProgressBar(0, 100);
         JLabel jl1 = new JLabel("waiting");
 
+        //create the listener for the slider
         Listener l = new Listener(jp1, jl1, js1);
         js1.addChangeListener(l);
 
+        //addd component on the window
         c.add(js1);
         c.add(jp1);
         c.add(jl1);
 
         this.setVisible(true);
     }
-
-
 }
 
 /**
- * 
+ * class for detect slider mouvement
  */
 class Listener implements ChangeListener {
 	JProgressBar jp1;
     JLabel jl1;
     JSlider js1;
-
     int number = 0;
-	
     /**
-     * 
-     * @param jp1
-     * @param jl1
-     * @param js1
+     * initialize the instance with parameters
+     * @param jp1 progress bar who display the number of the slider
+     * @param jl1 label progress bar who display the number of the slider
+     * @param js1 slider who modify the label and the progress bar
      */
 	Listener(JProgressBar jp1, JLabel jl1, JSlider js1){
 		this.jp1 = jp1;
@@ -66,8 +62,7 @@ class Listener implements ChangeListener {
 	}
 	
     /**
-     * 
-     * @param e
+     * modify the value of the label and the progress bar with the slider
      */
     @Override
     public void stateChanged(ChangeEvent e) {