Replaces the "Remove server" button with an (X) on the tab itself

src/main/java/net/knarcraft/minecraftserverlauncher/profile/Profile.java

@@ -141,14 +141,16 @@ public class Profile {
      * @param name <p>The name of the collection and its elements</p>
      */
     public void addCollection(String name) throws ConfigurationException {
-        if (name == null) { //If a user cancels or crosses out window
+        //Skip if no name was given
+        if (name == null) {
             return;
         }
         if (getCollection(name) == null && !name.equals("All") && CommonFunctions.nameIsValid(name)) {
             collections.add(new Collection(name));
         } else {
-            serverLauncherGui.showError("A server name must my unique and not empty or \"All\"." +
-                    "It can't contain any of the characters \"!\", \"?\" or \";\".");
+            serverLauncherGui.showError("A server name must be unique and not empty. " +
+                    "In addition, a server cannot be named: \"All\". " +
+                    "It cannot contain any of the characters \"!\", \"?\" or \";\".");
         }
     }
 

src/main/java/net/knarcraft/minecraftserverlauncher/userinterface/CloseTabActionListener.java

@@ -0,0 +1,47 @@
+package net.knarcraft.minecraftserverlauncher.userinterface;
+
+import net.knarcraft.minecraftserverlauncher.Main;
+import net.knarcraft.minecraftserverlauncher.profile.ServerLauncherController;
+
+import javax.swing.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+/**
+ * Listener for clicking the close button of a server tab
+ */
+public class CloseTabActionListener implements ActionListener {
+
+    private final String tabName;
+    private final JTabbedPane tabPane;
+
+    /**
+     * Instantiates a new close tab action listener
+     * @param tabPane <p>The tab pane containing all tabs</p>
+     * @param tabName <p>The name of the tab connected to this action listener</p>
+     */
+    public CloseTabActionListener(JTabbedPane tabPane, String tabName) {
+        this.tabName = tabName;
+        this.tabPane = tabPane;
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent evt) {
+        int index = tabPane.indexOfTab(tabName);
+        if (index >= 0) {
+            //Abort if the user just mis-clicked
+            int answer = JOptionPane.showConfirmDialog(null,
+                    String.format("Do you really want to remove the server %s?", tabName), "Remove server",
+                    JOptionPane.YES_NO_OPTION
+            );
+            if (answer == JOptionPane.YES_NO_OPTION) {
+                //Remove the server
+                ServerLauncherController controller = Main.getController();
+                controller.getCurrentProfile().removeCollection(tabName);
+                controller.getGUI().updateWithSavedProfileData();
+                controller.getCurrentProfile().updateConsoles();
+            }
+        }
+    }
+
+}

src/main/java/net/knarcraft/minecraftserverlauncher/userinterface/ServerLauncherGUI.java

@@ -9,6 +9,7 @@ import net.knarcraft.minecraftserverlauncher.utility.BackupUtil;
 import javax.imageio.ImageIO;
 import javax.naming.ConfigurationException;
 import javax.swing.*;
+import javax.swing.plaf.basic.BasicButtonUI;
 import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
@@ -160,9 +161,44 @@ public class ServerLauncherGUI extends MessageHandler implements ActionListener,
         serverControlTab.update();
         for (Collection collection : controller.getCurrentProfile().getCollections()) {
             serversPane.addTab(collection.getName(), collection.getServerTab().getPanel());
+            addCloseButtonToServerTab(collection.getName());
         }
     }
 
+    /**
+     *
+     * @param serverName <p>The name of the server/tab to add a close button to</p>
+     */
+    private void addCloseButtonToServerTab(String serverName) {
+        int index = serversPane.indexOfTab(serverName);
+        JPanel tabPanel = new JPanel(new GridBagLayout());
+        tabPanel.setOpaque(false);
+        JLabel serverTitleLabel = new JLabel(serverName);
+        JButton removeServerButton = new JButton("(X)");
+        removeServerButton.setBorder(BorderFactory.createEtchedBorder());
+        removeServerButton.setFocusable(false);
+        removeServerButton.setBorderPainted(false);
+        removeServerButton.setContentAreaFilled(false);
+        removeServerButton.setRolloverEnabled(true);
+        removeServerButton.setPreferredSize(new Dimension(18, 17));
+        removeServerButton.setUI(new BasicButtonUI());
+
+        GridBagConstraints gridBagConstraints = new GridBagConstraints();
+        gridBagConstraints.gridx = 0;
+        gridBagConstraints.gridy = 0;
+        gridBagConstraints.weightx = 1;
+
+        tabPanel.add(serverTitleLabel, gridBagConstraints);
+
+        gridBagConstraints.gridx++;
+        gridBagConstraints.weightx = 0;
+        tabPanel.add(removeServerButton, gridBagConstraints);
+
+        serversPane.setTabComponentAt(index, tabPanel);
+
+        removeServerButton.addActionListener(new CloseTabActionListener(serversPane, serverName));
+    }
+
     /**
      * Initializes the server launcher GUI
      *

src/main/java/net/knarcraft/minecraftserverlauncher/userinterface/ServerTab.java

@@ -23,11 +23,9 @@ public class ServerTab implements ActionListener {
     private final JComboBox<String> serverVersions;
     private final JComboBox<String> maxRam;
     private final JCheckBox enabledCheckbox;
-    private final JButton removeServerButton;
     private final JButton browseButton;
     private final JTextField directory;
     private final JPanel panel;
-    private final String name;
 
     /**
      * Initializes a new server tab with the given name
@@ -36,7 +34,6 @@ public class ServerTab implements ActionListener {
      * @throws ConfigurationException <p>If unable to create the new tab</p>
      */
     public ServerTab(String name) throws ConfigurationException {
-        this.name = name;
         panel = new JPanel();
         Main.getController().getGUI().getPane().addTab(name, null, panel, null);
         SpringLayout sl_panel_3 = new SpringLayout();
@@ -88,14 +85,6 @@ public class ServerTab implements ActionListener {
         panel.add(enabledCheckbox);
         enabledCheckbox.addActionListener(this);
 
-        removeServerButton = new JButton("Remove server");
-        sl_panel_3.putConstraint(SpringLayout.NORTH, removeServerButton, 0, SpringLayout.NORTH, serverVersions);
-        sl_panel_3.putConstraint(SpringLayout.SOUTH, removeServerButton, 0, SpringLayout.SOUTH, serverVersions);
-        sl_panel_3.putConstraint(SpringLayout.WEST, removeServerButton, 6, SpringLayout.EAST, serverVersions);
-        sl_panel_3.putConstraint(SpringLayout.EAST, removeServerButton, -10, SpringLayout.EAST, panel);
-        panel.add(removeServerButton);
-        removeServerButton.addActionListener(this);
-
         JLabel lblDirectory = new JLabel("Directory");
         sl_panel_3.putConstraint(SpringLayout.WEST, lblDirectory, 6, SpringLayout.EAST, enabledCheckbox);
         panel.add(lblDirectory);
@@ -112,7 +101,7 @@ public class ServerTab implements ActionListener {
 
         browseButton = new JButton("Browse");
         sl_panel_3.putConstraint(SpringLayout.EAST, directory, -6, SpringLayout.WEST, browseButton);
-        sl_panel_3.putConstraint(SpringLayout.NORTH, browseButton, 3, SpringLayout.SOUTH, removeServerButton);
+        sl_panel_3.putConstraint(SpringLayout.NORTH, browseButton, 3, SpringLayout.SOUTH, serverVersions);
         sl_panel_3.putConstraint(SpringLayout.EAST, browseButton, -10, SpringLayout.EAST, panel);
         sl_panel_3.putConstraint(SpringLayout.SOUTH, directory, 0, SpringLayout.SOUTH, browseButton);
         sl_panel_3.putConstraint(SpringLayout.NORTH, directory, 0, SpringLayout.NORTH, browseButton);
@@ -209,9 +198,7 @@ public class ServerTab implements ActionListener {
 
     @Override
     public void actionPerformed(ActionEvent e) {
-        if (e.getSource() == removeServerButton) {
-            remove();
-        } else if (e.getSource() == browseButton) {
+        if (e.getSource() == browseButton) {
             browse();
         } else if (e.getSource() == serverTypes) {
             try {
@@ -222,15 +209,6 @@ public class ServerTab implements ActionListener {
         }
     }
 
-    /**
-     * Removes the collection containing this ServerTab, and updates everything necessary
-     */
-    private void remove() {
-        Main.getController().getCurrentProfile().removeCollection(this.name);
-        Main.getController().getGUI().updateWithSavedProfileData();
-        Main.getController().getCurrentProfile().updateConsoles();
-    }
-
     /**
      * Asks the user for server location and updates the GUI if given a valid value
      */