Close button WORKS !

src/lsystem/screen/main/Listener.java

@@ -31,11 +31,13 @@ public class Listener implements ActionListener, KeyListener, MouseWheelListener
     public void actionPerformed(ActionEvent e) {
         switch (type) {
             case "Close":
-                frame.getTab().removeTabAt(index-1);
-                frame.decreaseTab();
-                for(int i = 0; i < frame.getTab().getComponentCount(); i++){
-                    frame.getTab().setTitleAt(i,"Génération"+(i+1));
+                Component selected = frame.tabs.getSelectedComponent();
+                if (selected != null) {
+
+                    frame.tabs.remove(selected);
                 }
+                frame.decreaseTab();
+                frame.renameTabs();
 
                 break;
             case "Help":

src/lsystem/screen/main/MainFrame.java

@@ -16,7 +16,7 @@ public class MainFrame extends JFrame {
 	private int nbTabs;
 	boolean helpWindow = false;
 	private final JPanel basePanel;
-	private final JTabbedPane tabs;
+	public final JTabbedPane tabs;
 	private final JButton newGen;
 	private final JButton help;
 	private final int nbRules;
@@ -49,6 +49,7 @@ public class MainFrame extends JFrame {
         
         nbTabs++;
 		new Tab(nbTabs, nbRules, tabs,this);
+		renameTabs();
     }
 	public JTabbedPane getTab(){
 		return tabs;
@@ -98,5 +99,10 @@ public class MainFrame extends JFrame {
 		}
 
 	}
+	public void renameTabs(){
+		for(int i =0;i<nbTabs;i++){
+			tabs.setTitleAt(i,("Génération"+(i+1)));
+		}
+	}
 
 }

src/lsystem/screen/main/Tab.java

@@ -6,7 +6,7 @@ import java.util.Arrays;
 
 public class Tab extends JPanel{
 
-    int nbTabs;
+    public int nbTabs;
     int nbRules;
     public JSpinner itSpinner;
     JTextField axiomeField,rulesField;
@@ -71,7 +71,7 @@ public class Tab extends JPanel{
         tab.setLayout(new BoxLayout(tab,1));
 
         close = new JButton("Close");
-        close.addActionListener(new Listener(frame,nbTabs,"Close",this));
+        close.addActionListener(new Listener(frame,this.nbTabs,"Close",this));
         tab.add(close);