fix memory leak

app/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "com.stardust.scriptdroid"
         minSdkVersion 19
         targetSdkVersion 23
-        versionCode 25
-        versionName "1.17.0215"
+        versionCode 27
+        versionName "1.17.0215(2)"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
@@ -46,6 +46,9 @@ repositories {
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     testCompile 'junit:junit:4.12'
+    debugCompile 'com.squareup.leakcanary:leakcanary-android:1.5'
+    releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.5'
+    testCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.5'
 
     compile 'com.android.support:appcompat-v7:25.1.0'
     compile 'com.android.support:design:25.1.0'

app/src/main/java/com/stardust/scriptdroid/App.java

@@ -5,6 +5,8 @@ import android.app.Application;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 
+import com.squareup.leakcanary.LeakCanary;
+import com.stardust.scriptdroid.bounds_assist.BoundsAssistant;
 import com.stardust.scriptdroid.droid.runtime.action.ActionPerformAccessibilityDelegate;
 import com.stardust.scriptdroid.record.AccessibilityRecorderDelegate;
 import com.stardust.scriptdroid.service.AccessibilityWatchDogService;
@@ -35,6 +37,12 @@ public class App extends Application {
 
     public void onCreate() {
         super.onCreate();
+        if (LeakCanary.isInAnalyzerProcess(this)) {
+            // This process is dedicated to LeakCanary for heap analysis.
+            // You should not init your app in this process.
+            return;
+        }
+        LeakCanary.install(this);
         if (!BuildConfig.DEBUG)
             Thread.setDefaultUncaughtExceptionHandler(new CrashHandler(ErrorReportActivity.class));
         instance = new WeakReference<>(this);
@@ -43,9 +51,12 @@ public class App extends Application {
         initAccessibilityServiceDelegates();
     }
 
+
     private void initAccessibilityServiceDelegates() {
         AccessibilityWatchDogService.addDelegateIfNeeded(100, ActionPerformAccessibilityDelegate.class);
         AccessibilityWatchDogService.addDelegateIfNeeded(200, AccessibilityRecorderDelegate.getInstance());
+        AccessibilityWatchDogService.addDelegateIfNeeded(300, BoundsAssistant.class);
+
     }
 
     private void registerActivityLifecycleCallback() {

app/src/main/java/com/stardust/scriptdroid/bounds_assist/BoundsAssistant.java

@@ -1,5 +1,6 @@
 package com.stardust.scriptdroid.bounds_assist;
 
+import android.accessibilityservice.AccessibilityService;
 import android.graphics.Rect;
 import android.preference.PreferenceManager;
 import android.view.accessibility.AccessibilityEvent;
@@ -10,15 +11,16 @@ import com.afollestad.materialdialogs.MaterialDialog;
 import com.stardust.scriptdroid.App;
 import com.stardust.scriptdroid.Pref;
 import com.stardust.scriptdroid.R;
+import com.stardust.scriptdroid.service.AccessibilityDelegate;
 
 
 /**
  * Created by Stardust on 2017/2/4.
  */
 
-public class BoundsAssistant {
-    public static final String KEY_BOUNDS_ASSIST_ENABLE = "ASSIST_MODE_ENABLE";
+public class BoundsAssistant implements AccessibilityDelegate {
 
+    public static final String KEY_BOUNDS_ASSIST_ENABLE = "ASSIST_MODE_ENABLE";
 
     private static boolean assistModeEnable;
     private static BoundsAssistClipList boundsAssistClipList = SharedPrefBoundsAssistClipList.getInstance();
@@ -43,7 +45,7 @@ public class BoundsAssistant {
                 .show();
     }
 
-    public static void performAssistance(AccessibilityEvent event) {
+    private static void performAssistance(AccessibilityEvent event) {
         if (!assistModeEnable) {
             return;
         }
@@ -59,6 +61,12 @@ public class BoundsAssistant {
         }
     }
 
+    @Override
+    public boolean onAccessibilityEvent(AccessibilityService service, AccessibilityEvent event) {
+        performAssistance(event);
+        return false;
+    }
+
     public static Rect getBoundsInScreen(AccessibilityNodeInfo nodeInfo) {
         Rect rect = new Rect();
         nodeInfo.getBoundsInScreen(rect);
@@ -80,4 +88,5 @@ public class BoundsAssistant {
         assistModeEnable = PreferenceManager.getDefaultSharedPreferences(App.getApp()).getBoolean(KEY_BOUNDS_ASSIST_ENABLE, false);
     }
 
+
 }

app/src/main/java/com/stardust/scriptdroid/droid/Droid.java

@@ -13,6 +13,7 @@ import com.stardust.scriptdroid.file.FileUtils;
 
 import java.io.File;
 import java.io.FileNotFoundException;
+import java.io.Serializable;
 
 import timber.log.Timber;
 
@@ -30,7 +31,7 @@ public class Droid {
 
     public static final String UI = "\"ui\";";
 
-    public interface OnRunFinishedListener {
+    public interface OnRunFinishedListener extends Serializable {
         void onRunFinished(Object result, Exception e);
     }
 

app/src/main/java/com/stardust/scriptdroid/droid/script/ScriptExecuteActivity.java

@@ -16,44 +16,52 @@ import static com.stardust.scriptdroid.droid.Droid.JAVA_SCRIPT_ENGINE;
 
 public class ScriptExecuteActivity extends Activity {
 
-    private static String script;
-    private static Droid.OnRunFinishedListener onRunFinishedListener;
-    private static RunningConfig runningConfig;
+    private static final String EXTRA_SCRIPT = "EXTRA_SCRIPT";
+    private static final String EXTRA_ON_RUN_FINISHED_LISTENER = "EXTRA_ON_RUN_FINISHED_LISTENER";
     private Object mResult;
+    private String mScript;
+    private Droid.OnRunFinishedListener mOnRunFinishedListener;
 
 
     public static void runScript(String script, Droid.OnRunFinishedListener listener, RunningConfig config) {
-        ScriptExecuteActivity.script = script;
-        ScriptExecuteActivity.onRunFinishedListener = listener;
-        ScriptExecuteActivity.runningConfig = config;
-        App.getApp().startActivity(new Intent(App.getApp(), ScriptExecuteActivity.class).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
+        App.getApp().startActivity(new Intent(App.getApp(), ScriptExecuteActivity.class)
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                .putExtra(EXTRA_SCRIPT, script)
+                .putExtra(EXTRA_ON_RUN_FINISHED_LISTENER, listener));
     }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        handleIntent(getIntent());
         runScript();
     }
 
+    private void handleIntent(Intent intent) {
+        mScript = intent.getStringExtra(EXTRA_SCRIPT);
+        mOnRunFinishedListener = (Droid.OnRunFinishedListener) intent.getSerializableExtra(EXTRA_ON_RUN_FINISHED_LISTENER);
+    }
+
     private void runScript() {
         JAVA_SCRIPT_ENGINE.set("activity", Activity.class, this);
         try {
-            mResult = JAVA_SCRIPT_ENGINE.execute(script);
+            mResult = JAVA_SCRIPT_ENGINE.execute(mScript);
         } catch (Exception e) {
-            onRunFinishedListener.onRunFinished(null, e);
+            mOnRunFinishedListener.onRunFinished(null, e);
             finish();
         }
     }
 
     @Override
     public void finish() {
-        onRunFinishedListener.onRunFinished(mResult, null);
+        mOnRunFinishedListener.onRunFinished(mResult, null);
         super.finish();
     }
 
     @Override
     protected void onDestroy() {
         super.onDestroy();
+        JAVA_SCRIPT_ENGINE.set("activity", Activity.class, null);
         JAVA_SCRIPT_ENGINE.removeAndDestroy(Thread.currentThread());
     }
 }

app/src/main/java/com/stardust/scriptdroid/external/notification/record/ActionRecordNotificationHandleService.java

@@ -29,6 +29,7 @@ public class ActionRecordNotificationHandleService extends Service {
     private static final int ACTION_STOP = 17771;
     private static final int ACTION_START_OR_PAUSE = 17772;
     private static final int ACTION_DELETE = 17773;
+    private static final int ACTION_REDO = 17774;
 
     public static PendingIntent getStartOrPauseIntent() {
         Intent intent = new Intent(App.getApp(), ActionRecordNotificationHandleService.class)
@@ -51,6 +52,15 @@ public class ActionRecordNotificationHandleService extends Service {
         return PendingIntent.getService(App.getApp(), ACTION_DELETE, intent, PendingIntent.FLAG_UPDATE_CURRENT);
     }
 
+
+    public static PendingIntent getRedoIntent() {
+        Intent intent = new Intent(App.getApp(), ActionRecordNotificationHandleService.class)
+                .putExtra(EXTRA_INTENT_VALID, true)
+                .putExtra(EXTRA_ACTION, ACTION_REDO);
+        return PendingIntent.getService(App.getApp(), ACTION_REDO, intent, PendingIntent.FLAG_UPDATE_CURRENT);
+    }
+
+
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
         boolean intentValid = intent.getBooleanExtra(EXTRA_INTENT_VALID, false);
@@ -65,16 +75,23 @@ public class ActionRecordNotificationHandleService extends Service {
         switch (action) {
             case ACTION_STOP:
                 stopRecord();
+                collapseNotificationBar();
                 break;
             case ACTION_START_OR_PAUSE:
                 startOrPauseRecord();
+                collapseNotificationBar();
                 break;
             case ACTION_DELETE:
+                ActionRecordSwitchNotification.cancelNotification();
                 stopRecordIfNeeded();
+                break;
+            case ACTION_REDO:
+                redoRecord();
+                break;
         }
-        collapseNotificationBar();
     }
 
+
     private void collapseNotificationBar() {
         sendBroadcast(new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
     }
@@ -115,9 +132,18 @@ public class ActionRecordNotificationHandleService extends Service {
         }
     }
 
+    private void redoRecord() {
+        if (AccessibilityRecorderDelegate.getInstance().getState() != STOPPED) {
+            AccessibilityRecorderDelegate.getInstance().stopRecord();
+            ActionRecordSwitchView.getInstance().setState(STOPPED);
+        }
+    }
+
+
     @Nullable
     @Override
     public IBinder onBind(Intent intent) {
         return null;
     }
+
 }

app/src/main/java/com/stardust/scriptdroid/external/notification/record/ActionRecordSwitchNotification.java

@@ -33,4 +33,9 @@ public class ActionRecordSwitchNotification {
         NotificationManager notificationManager = (NotificationManager) App.getApp().getSystemService(Context.NOTIFICATION_SERVICE);
         notificationManager.notify(NOTIFY_ID, notification);
     }
+
+    public static void cancelNotification() {
+        NotificationManager notificationManager = (NotificationManager) App.getApp().getSystemService(Context.NOTIFICATION_SERVICE);
+        notificationManager.cancel(NOTIFY_ID);
+    }
 }

app/src/main/java/com/stardust/scriptdroid/external/notification/record/ActionRecordSwitchView.java

@@ -50,5 +50,7 @@ public class ActionRecordSwitchView extends RemoteViews {
     private void setUpOnClick() {
         setOnClickPendingIntent(R.id.stop, ActionRecordNotificationHandleService.getStopIntent());
         setOnClickPendingIntent(R.id.start_or_pause, ActionRecordNotificationHandleService.getStartOrPauseIntent());
+        setOnClickPendingIntent(R.id.close, ActionRecordNotificationHandleService.getDeleteIntent());
+        setOnClickPendingIntent(R.id.redo, ActionRecordNotificationHandleService.getRedoIntent());
     }
 }

app/src/main/java/com/stardust/scriptdroid/record/ActionRecorder.java

@@ -62,6 +62,8 @@ public class ActionRecorder {
         @Override
         public void onAccessibilityEvent(AccessibilityEvent event, StringBuilder sb) {
             AccessibilityNodeInfo source = event.getSource();
+            if (source == null)
+                return;
             String bounds = boundsToString(getBoundsInScreen(source));
             source.recycle();
             onAccessibilityEvent(event, bounds, sb);

app/src/main/java/com/stardust/scriptdroid/service/AccessibilityWatchDogService.java

@@ -8,6 +8,7 @@ import android.view.accessibility.AccessibilityEvent;
 import com.stardust.scriptdroid.App;
 import com.stardust.view.accessibility.AccessibilityServiceUtils;
 
+import java.lang.ref.WeakReference;
 import java.util.Map;
 import java.util.SortedMap;
 import java.util.TreeMap;
@@ -21,7 +22,7 @@ public class AccessibilityWatchDogService extends AccessibilityService {
     private static final String TAG = "AccessibilityWatchDog";
 
     private static final SortedMap<Integer, AccessibilityDelegate> mDelegates = new TreeMap<>();
-    private static AccessibilityWatchDogService instance;
+    private static WeakReference<AccessibilityWatchDogService> instance;
 
     public static void addDelegate(AccessibilityDelegate delegate, int uniquePriority) {
         synchronized (mDelegates) {
@@ -62,7 +63,9 @@ public class AccessibilityWatchDogService extends AccessibilityService {
     }
 
     public static AccessibilityWatchDogService getInstance() {
-        return instance;
+        if (instance == null)
+            return null;
+        return instance.get();
     }
 
     @Override
@@ -85,12 +88,12 @@ public class AccessibilityWatchDogService extends AccessibilityService {
         super.onServiceConnected();
         // FIXME: 2017/2/12 有时在无障碍中开启服务后这里不会调用服务也不会运行，安卓的BUG???
         Log.v(TAG, "onServiceConnected");
-        instance = this;
+        instance = new WeakReference<>(this);
     }
 
     public static void disable() {
-        if (instance != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-            instance.disableSelf();
+        if (instance != null && instance.get() != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            instance.get().disableSelf();
         } else {
             AccessibilityServiceUtils.goToAccessibilitySetting(App.getApp());
         }

app/src/main/java/com/stardust/scriptdroid/ui/edit/EditActivity.java

@@ -1,7 +1,9 @@
 package com.stardust.scriptdroid.ui.edit;
 
+import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.design.widget.Snackbar;
@@ -18,6 +20,7 @@ import com.jecelyin.editor.v2.common.SaveListener;
 import com.jecelyin.editor.v2.ui.EditorDelegate;
 import com.jecelyin.editor.v2.view.EditorView;
 import com.jecelyin.editor.v2.view.menu.MenuDef;
+import com.stardust.scriptdroid.App;
 import com.stardust.scriptdroid.Pref;
 import com.stardust.scriptdroid.R;
 import com.stardust.scriptdroid.droid.Droid;
@@ -40,6 +43,18 @@ public class EditActivity extends Editor920Activity {
 
     private static final String KEY_EDIT_ACTIVITY_FIRST_USE = "KEY_EDIT_ACTIVITY_FIRST_USE";
 
+    private static final String ACTION_ON_RUN_FINISHED = "ACTION_ON_RUN_FINISHED";
+    private static final String EXTRA_EXCEPTION = "EXTRA_EXCEPTION";
+
+    private static final Droid.OnRunFinishedListener ON_RUN_FINISHED_LISTENER = new Droid.OnRunFinishedListener() {
+
+        @Override
+        public void onRunFinished(Object result, Exception e) {
+            App.getApp().sendBroadcast(new Intent(ACTION_ON_RUN_FINISHED)
+                    .putExtra(EXTRA_EXCEPTION, e));
+        }
+    };
+
     public static void editFile(Context context, String path) {
         editFile(context, null, path);
     }
@@ -57,12 +72,24 @@ public class EditActivity extends Editor920Activity {
     private DrawerLayout mDrawerLayout;
     private EditorDelegate mEditorDelegate;
     private SparseArray<ToolbarMenuItem> mMenuMap;
+    private BroadcastReceiver mOnRunFinishedReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (intent.getAction().equals(ACTION_ON_RUN_FINISHED)) {
+                setMenuStatus(R.id.run, MenuDef.STATUS_NORMAL);
+                Exception e = (Exception) intent.getSerializableExtra(EXTRA_EXCEPTION);
+                if (e != null)
+                    Snackbar.make(mView, getString(R.string.text_error) + ": " + e.getMessage(), Snackbar.LENGTH_INDEFINITE).show();
+            }
+        }
+    };
 
     public void onCreate(Bundle b) {
         super.onCreate(b);
         handleIntent();
         setUpUI();
         setUpEditor();
+        registerReceiver(mOnRunFinishedReceiver, new IntentFilter(ACTION_ON_RUN_FINISHED));
     }
 
     @Override
@@ -175,19 +202,7 @@ public class EditActivity extends Editor920Activity {
     private void run() {
         Snackbar.make(mView, R.string.text_start_running, Snackbar.LENGTH_SHORT).show();
         setMenuStatus(R.id.run, MenuDef.STATUS_DISABLED);
-        Droid.getInstance().runScriptFile(mFile, new Droid.OnRunFinishedListener() {
-            @Override
-            public void onRunFinished(Object result, final Exception e) {
-                runOnUiThread(new Runnable() {
-                    @Override
-                    public void run() {
-                        setMenuStatus(R.id.run, MenuDef.STATUS_NORMAL);
-                        if (e != null)
-                            Snackbar.make(mView, getString(R.string.text_error) + ": " + e.getMessage(), Snackbar.LENGTH_INDEFINITE).show();
-                    }
-                });
-            }
-        });
+        Droid.getInstance().runScriptFile(mFile, ON_RUN_FINISHED_LISTENER);
     }
 
     @ViewBinding.Click(R.id.undo)
@@ -261,4 +276,10 @@ public class EditActivity extends Editor920Activity {
     public void doCommand(Command command) {
         mEditorDelegate.doCommand(command);
     }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        unregisterReceiver(mOnRunFinishedReceiver);
+    }
 }

app/src/main/java/com/stardust/scriptdroid/ui/error/IssueReportActivity.java

@@ -125,7 +125,7 @@ public class IssueReportActivity extends IssueReporterActivity {
 
     @Override
     protected String getGuestToken() {
-        return "f32d789662645640ff22e240b80f5d76117181a1";
+        return "899ce4e559f7c3fad7a3a34a05777724758550de";
     }
 
 }

app/src/main/java/com/stardust/scriptdroid/ui/main/MainActivity.java

@@ -284,7 +284,7 @@ public class MainActivity extends BaseActivity implements FileChooserDialog.File
 
     public static void onActionRecordStopped(Context context, String script) {
         Intent intent = new Intent(context, MainActivity.class)
-                .addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                 .putExtra(EXTRA_ACTION, ACTION_ON_ACTION_RECORD_STOPPED)
                 .putExtra(ARGUMENT_SCRIPT, script);
         context.startActivity(intent);

app/src/main/res/layout/drawer.xml

@@ -18,7 +18,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:scaleType="fitXY"
-            android:src="@drawable/slide_menu_img"/>
+            android:src="@drawable/slide_menu_img_200px"/>
 
         <TextView
             android:id="@+id/version"

app/src/main/res/layout/remote_views_record_switch.xml

@@ -64,5 +64,55 @@
             android:textSize="12sp"/>
     </LinearLayout>
 
+    <LinearLayout
+        android:id="@+id/redo"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_margin="4dp"
+        android:background="@drawable/btn_selector"
+        android:clickable="true"
+        android:gravity="center_horizontal"
+        android:orientation="vertical"
+        android:padding="4dp">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:padding="5dp"
+            android:src="@drawable/ic_redo_gray600"/>
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:text="@string/text_re_record"
+            android:textColor="#777777"
+            android:textSize="12sp"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/close"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_margin="4dp"
+        android:background="@drawable/btn_selector"
+        android:clickable="true"
+        android:gravity="center_horizontal"
+        android:orientation="vertical"
+        android:padding="4dp">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:src="@drawable/ic_close_gray600_48dp"/>
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:text="@string/text_close"
+            android:textColor="#777777"
+            android:textSize="12sp"/>
+    </LinearLayout>
 
 </LinearLayout>

app/src/main/res/values/strings.xml

@@ -115,4 +115,6 @@
     <string name="text_need_enable_accessibility_service">需要打开\"自动操作服务“才能录制脚本</string>
     <string name="text_join_qq_group">加入QQ交流群</string>
     <string name="text_qq_group_id_copied">已复制群号到剪贴板</string>
+    <string name="text_close">关闭</string>
+    <string name="text_re_record">重新录制</string>
 </resources>

app/src/test/java/com/stardust/scriptdroid/ExampleUnitTest.java

@@ -1,11 +1,10 @@
 package com.stardust.scriptdroid;
 
+import android.os.Bundle;
+
 import org.junit.Test;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.TreeMap;
+import java.io.Serializable;
 
 /**
  * Example local unit test, which will execute on the development machine (host).
@@ -15,69 +14,18 @@ import java.util.TreeMap;
 public class ExampleUnitTest {
     @Test
     public void testSync() throws Exception {
-        final Sync sync = new Sync();
-        //sync.print(11);
-        add(sync, 11, 123);
-        //Thread.sleep(1);
-        sync.print(11);
-        add(sync, 11, 456);
-        sync.print(11);
-    }
-
-    private void add(final Sync sync, final int key, final int i) {
-        new Thread(new Runnable() {
+        Bundle bundle = new Bundle();
+        bundle.putSerializable("xxx", new XXX() {
             @Override
-            public void run() {
-                sync.add(key, i);
+            void run() {
+                System.out.println("xxx");
             }
-        }).start();
+        });
+        ((XXX) bundle.getSerializable("xxx")).run();
     }
 
-    private static class Sync {
+    private static abstract class XXX implements Serializable {
 
-        private final Map<Integer, List<Integer>> mMap = new TreeMap<>();
-
-        Sync() {
-            for (int i = 0; i < 10; i++) {
-                List<Integer> list = new ArrayList<>();
-                for (int j = 0; j < 10; j++) {
-                    list.add(j * i);
-                }
-                mMap.put(i, list);
-            }
-        }
-
-        public Sync add(int key, int i) {
-            synchronized (mMap) {
-                List<Integer> list = ensureList(key);
-                list.add(i);
-                System.out.println("add:" + key + " " + i);
-            }
-            return this;
-        }
-
-        private List<Integer> ensureList(int key) {
-            List<Integer> list = mMap.get(key);
-            if (list == null) {
-                list = new ArrayList<>();
-                mMap.put(key, list);
-            }
-            return list;
-        }
-
-        public void print(int key) {
-            synchronized (mMap) {
-                List<Integer> list = mMap.get(key);
-                System.out.print(key + ":");
-                if (list == null) {
-                    System.out.print("null");
-                } else {
-                    for (Integer i : list) {
-                        System.out.print(i + " ");
-                    }
-                }
-                System.out.println();
-            }
-        }
+        abstract void run();
     }
 }