Launch client automatically when updates are complete

PC_Launcher/src/main/java/launcher/Gameupdater/ClientDownloader.java

@@ -38,6 +38,7 @@ public static void downloadOrUpdate(File gamePath, String fileName, String url,
         error.printStackTrace();
       } finally {
         Downloader.currently_updating = false;
+        Downloader.update_latch.countDown();
       }
     }).start();
   }

PC_Launcher/src/main/java/launcher/Gameupdater/Downloader.java

@@ -12,6 +12,7 @@
 import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CountDownLatch;
 
 public class Downloader implements Runnable {
 
@@ -21,6 +22,7 @@ public class Downloader implements Runnable {
 
   public static boolean offline_start = false;
   public static boolean currently_updating = false;
+  public static CountDownLatch update_latch = new CountDownLatch(1);
 
   private List<File> FILE_LIST = new ArrayList<>();
 
@@ -124,5 +126,6 @@ public void run() {
     }
     ProgressBar.setDownloadProgress(ProgressBar.doneText, ProgressBar.donePercent);
     currently_updating = false;
+    update_latch.countDown();
   }
 }

PC_Launcher/src/main/java/launcher/Utils/ClientLauncher.java

@@ -12,14 +12,41 @@
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 
-import javax.swing.JOptionPane;
-
 public class ClientLauncher {
+	// Launch client automatically when updates are complete.
+	private static String autoPlayServer;
+	private static final Runnable autoPlayRunnable = new Runnable() {
+		@Override
+		public void run() {
+			try {
+				Downloader.update_latch.await();
+			} catch (InterruptedException e) {
+				return;
+			}
+			String serverName = autoPlayServer;
+			autoPlayServer = null;
+			try {
+				launchClientForServer(serverName);
+			} catch (IOException e) {
+				throw new RuntimeException(e);
+			}
+		}
+	};
+
 	public static void launchClientForServer(String serverName) throws IOException {
-    if (Downloader.currently_updating) {
-      JOptionPane.showMessageDialog(null, "Currently updating the client, please wait!");
-      return;
-    }
+		// Wait for updates to complete before launching.
+		if (autoPlayServer != null || Downloader.currently_updating) {
+			// Store server name.
+			boolean threadStarted = autoPlayServer != null;
+			autoPlayServer = serverName;
+			// Wait in background.
+			if (!threadStarted) {
+				Thread t = new Thread(autoPlayRunnable);
+				t.start();
+			}
+			return;
+		}
+		// Launch client.
 		switch (serverName) {
 			case "preservation": {
 				String ip = "game.openrsc.com";