Shutdown Now to prevent NPE when task executed after app closed

HMCLCore/src/main/java/org/jackhuang/hmcl/game/DefaultGameRepository.java

@@ -172,6 +172,12 @@ public class DefaultGameRepository implements GameRepository {
         if (files != null)
             for (File dir : files)
                 if (dir.isDirectory()) {
+                    if (Thread.interrupted()) {
+                        this.versions = new HashMap<>();
+                        loaded = false;
+                        return;
+                    }
+
                     String id = dir.getName();
                     File json = new File(dir, id + ".json");
 

HMCLCore/src/main/java/org/jackhuang/hmcl/task/Schedulers.java

@@ -119,12 +119,12 @@ public final class Schedulers {
         Logging.LOG.info("Shutting down executor services.");
 
         if (CACHED_EXECUTOR != null)
-            CACHED_EXECUTOR.shutdown();
+            CACHED_EXECUTOR.shutdownNow();
 
         if (IO_EXECUTOR != null)
-            IO_EXECUTOR.shutdown();
+            IO_EXECUTOR.shutdownNow();
 
         if (SINGLE_EXECUTOR != null)
-            SINGLE_EXECUTOR.shutdown();
+            SINGLE_EXECUTOR.shutdownNow();
     }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/task/TaskExecutor.java

@@ -89,8 +89,10 @@ public final class TaskExecutor {
 
         while (!workerQueue.isEmpty()) {
             Future<?> future = workerQueue.poll();
-            if (future != null)
+            if (future != null) {
                 future.cancel(true);
+                System.out.println("Canceled " + future);
+            }
         }
     }