Adds a menu item for easily delete built .jar files

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

@@ -236,6 +236,15 @@ public class ServerLauncherController {
         this.currentProfile = getProfileByName(profileName);
     }
 
+    /**
+     * Gets the directory containing .jar files
+     *
+     * @return <p>The directory containing .jar files</p>
+     */
+    public String getJarDirectory() {
+        return this.jarDirectory;
+    }
+
     /**
      * Saves the state of the entire application to disk
      */

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

@@ -7,6 +7,7 @@ import net.knarcraft.minecraftserverlauncher.utility.CommonFunctions;
 import javax.swing.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.io.File;
 import java.util.Objects;
 
 /**
@@ -21,6 +22,7 @@ public class ServerLauncherMenu implements ActionListener {
     private JCheckBoxMenuItem downloadJarsCheckBoxMenuItem;
     private JMenuItem javaCommandMenuItem;
     private JMenuItem oldJavaCommandMenuItem;
+    private JMenuItem deleteBuiltJarsMenuItem;
     //Help
     private JMenuItem errorsMenuItem;
     private JMenuItem setupMenuItem;
@@ -31,6 +33,7 @@ public class ServerLauncherMenu implements ActionListener {
     private JMenuItem downloadJarsMenuItem;
     private JMenuItem javaCommandInfoMenuItem;
     private JMenuItem oldJavaCommandInfoMenuItem;
+    private JMenuItem deleteBuiltJarsInfoMenuItem;
     //Info/about
     private JMenuItem aboutMenuItem;
     private JMenuItem storyMenuItem;
@@ -93,6 +96,8 @@ public class ServerLauncherMenu implements ActionListener {
             configureJava(false);
         } else if (actionSource == oldJavaCommandMenuItem) {
             configureJava(true);
+        } else if (actionSource == deleteBuiltJarsMenuItem) {
+            deleteBuiltJars();
         } else if (actionSource == errorsMenuItem) {
             CommonFunctions.goToURL(serverLauncherGUI.getMessage("infoURL"));
         } else if (actionSource == setupMenuItem) {
@@ -109,6 +114,8 @@ public class ServerLauncherMenu implements ActionListener {
             serverLauncherGUI.showMessage("Java command", serverLauncherGUI.getMessage("javaCommandText"));
         } else if (actionSource == oldJavaCommandInfoMenuItem) {
             serverLauncherGUI.showMessage("Old Java command", serverLauncherGUI.getMessage("oldJavaCommandText"));
+        } else if (actionSource == deleteBuiltJarsInfoMenuItem) {
+            serverLauncherGUI.showMessage("Delete build jar files", serverLauncherGUI.getMessage("deleteBuiltJarFilesText"));
         } else if (actionSource == aboutMenuItem) {
             serverLauncherGUI.showMessage("About", serverLauncherGUI.getMessage("aboutText"));
         } else if (actionSource == storyMenuItem) {
@@ -127,6 +134,7 @@ public class ServerLauncherMenu implements ActionListener {
         downloadJarsCheckBoxMenuItem = createCheckBoxMenuItem("Download jars", mnOptions);
         javaCommandMenuItem = createMenuItem("Java command", mnOptions);
         oldJavaCommandMenuItem = createMenuItem("Old Java command", mnOptions);
+        deleteBuiltJarsMenuItem = createMenuItem("Delete build jar files", mnOptions);
     }
 
     /**
@@ -143,6 +151,7 @@ public class ServerLauncherMenu implements ActionListener {
         downloadJarsMenuItem = createMenuItem("Download jars", mnOptionsInfo);
         javaCommandInfoMenuItem = createMenuItem("Java command", mnOptionsInfo);
         oldJavaCommandInfoMenuItem = createMenuItem("Old Java command", mnOptionsInfo);
+        deleteBuiltJarsInfoMenuItem = createMenuItem("Delete build jar files", mnOptionsInfo);
 
         JMenu mnAbout = new JMenu("About");
         mnInfo.add(mnAbout);
@@ -197,6 +206,33 @@ public class ServerLauncherMenu implements ActionListener {
         }
     }
 
+    /**
+     * Deletes build Spigot and Bukkit .jar files if the user accepts
+     */
+    private void deleteBuiltJars() {
+        int answer = JOptionPane.showConfirmDialog(null, "This will delete build .jar files, causing them " +
+                        "to be rebuilt on the next run. Do you want to continue?", "Delete build .jar files",
+                JOptionPane.YES_NO_OPTION
+        );
+        if (answer == JOptionPane.YES_NO_OPTION) {
+            String jarDirectory = controller.getJarDirectory();
+            File spigotFile = new File(jarDirectory + "SpigotLatest");
+            File bukkitFile = new File(jarDirectory + "BukkitLatest");
+            boolean success = true;
+            if (spigotFile.exists() && !spigotFile.delete()) {
+                serverLauncherGUI.showError("Unable to delete latest spigot .jar");
+                success = false;
+            }
+            if (bukkitFile.exists() && !bukkitFile.delete()) {
+                serverLauncherGUI.showError("Unable to delete latest bukkit .jar");
+                success = false;
+            }
+            if (success) {
+                serverLauncherGUI.showMessage("Deletion successful", "Deleted build .jar files");
+            }
+        }
+    }
+
     /**
      * Asks the user for a delay if checked, and sets the value to the current profile
      */