8007295: Reduce number of warnings in awt classes

Reviewed-by: bae, anthony

src/share/classes/java/awt/CheckboxMenuItem.java

@@ -277,7 +277,7 @@ public class CheckboxMenuItem extends MenuItem implements ItemSelectable, Access
      * @since 1.4
      */
     public synchronized ItemListener[] getItemListeners() {
-        return (ItemListener[])(getListeners(ItemListener.class));
+        return getListeners(ItemListener.class);
     }
 
     /**

src/share/classes/java/awt/Cursor.java

@@ -163,11 +163,11 @@ public class Cursor implements java.io.Serializable {
      * hashtable, filesystem dir prefix, filename, and properties for custom cursors support
      */
 
-    private static final Hashtable  systemCustomCursors         = new Hashtable(1);
+    private static final Hashtable<String,Cursor> systemCustomCursors = new Hashtable<>(1);
     private static final String systemCustomCursorDirPrefix = initCursorDir();
 
     private static String initCursorDir() {
-        String jhome =  (String) java.security.AccessController.doPrivileged(
+        String jhome = java.security.AccessController.doPrivileged(
                new sun.security.action.GetPropertyAction("java.home"));
         return jhome +
             File.separator + "lib" + File.separator + "images" +
@@ -298,7 +298,7 @@ public class Cursor implements java.io.Serializable {
     static public Cursor getSystemCustomCursor(final String name)
         throws AWTException, HeadlessException {
         GraphicsEnvironment.checkHeadless();
-        Cursor cursor = (Cursor)systemCustomCursors.get(name);
+        Cursor cursor = systemCustomCursors.get(name);
 
         if (cursor == null) {
             synchronized(systemCustomCursors) {
@@ -319,11 +319,11 @@ public class Cursor implements java.io.Serializable {
             final String fileName =
                 systemCustomCursorProperties.getProperty(key);
 
-            String localized = (String)systemCustomCursorProperties.getProperty(prefix + DotNameSuffix);
+            String localized = systemCustomCursorProperties.getProperty(prefix + DotNameSuffix);
 
             if (localized == null) localized = name;
 
-            String hotspot = (String)systemCustomCursorProperties.getProperty(prefix + DotHotspotSuffix);
+            String hotspot = systemCustomCursorProperties.getProperty(prefix + DotHotspotSuffix);
 
             if (hotspot == null)
                 throw new AWTException("no hotspot property defined for cursor: " + name);
@@ -348,9 +348,9 @@ public class Cursor implements java.io.Serializable {
                 final int fy = y;
                 final String flocalized = localized;
 
-                cursor = (Cursor) java.security.AccessController.doPrivileged(
-                    new java.security.PrivilegedExceptionAction() {
-                    public Object run() throws Exception {
+                cursor = java.security.AccessController.<Cursor>doPrivileged(
+                    new java.security.PrivilegedExceptionAction<Cursor>() {
+                    public Cursor run() throws Exception {
                         Toolkit toolkit = Toolkit.getDefaultToolkit();
                         Image image = toolkit.getImage(
                            systemCustomCursorDirPrefix + fileName);
@@ -447,8 +447,8 @@ public class Cursor implements java.io.Serializable {
             systemCustomCursorProperties = new Properties();
 
             try {
-                AccessController.doPrivileged(
-                      new java.security.PrivilegedExceptionAction() {
+                AccessController.<Object>doPrivileged(
+                      new java.security.PrivilegedExceptionAction<Object>() {
                     public Object run() throws Exception {
                         FileInputStream fis = null;
                         try {

src/share/classes/java/awt/EventQueue.java

@@ -171,7 +171,7 @@ public class EventQueue {
      * The modifiers field of the current event, if the current event is an
      * InputEvent or ActionEvent.
      */
-    private WeakReference currentEvent;
+    private WeakReference<AWTEvent> currentEvent;
 
     /*
      * Non-zero if a thread is waiting in getNextEvent(int) for an event of
@@ -809,7 +809,7 @@ public class EventQueue {
         pushPopLock.lock();
         try {
                 return (Thread.currentThread() == dispatchThread)
-                ? ((AWTEvent)currentEvent.get())
+                ? currentEvent.get()
                 : null;
         } finally {
             pushPopLock.unlock();
@@ -1167,7 +1167,7 @@ public class EventQueue {
                 return;
             }
 
-            currentEvent = new WeakReference(e);
+            currentEvent = new WeakReference<>(e);
 
             // This series of 'instanceof' checks should be replaced with a
             // polymorphic type (for example, an interface which declares a

src/share/classes/java/awt/Menu.java

@@ -66,7 +66,7 @@ public class Menu extends MenuItem implements MenuContainer, Accessible {
 
         AWTAccessor.setMenuAccessor(
             new AWTAccessor.MenuAccessor() {
-                public Vector getItems(Menu menu) {
+                public Vector<MenuComponent> getItems(Menu menu) {
                     return menu.items;
                 }
             });
@@ -78,7 +78,7 @@ public class Menu extends MenuItem implements MenuContainer, Accessible {
      * @serial
      * @see #countItems()
      */
-    Vector              items = new Vector();
+    Vector<MenuComponent> items = new Vector<>();
 
     /**
      * This field indicates whether the menu has the
@@ -313,7 +313,7 @@ public class Menu extends MenuItem implements MenuContainer, Accessible {
             }
 
             int nitems = getItemCount();
-            Vector tempItems = new Vector();
+            Vector<MenuItem> tempItems = new Vector<>();
 
             /* Remove the item at index, nitems-index times
                storing them in a temporary vector in the
@@ -330,7 +330,7 @@ public class Menu extends MenuItem implements MenuContainer, Accessible {
                already in the correct order in the temp vector.
             */
             for (int i = 0; i < tempItems.size()  ; i++) {
-                add((MenuItem)tempItems.elementAt(i));
+                add(tempItems.elementAt(i));
             }
         }
     }
@@ -379,7 +379,7 @@ public class Menu extends MenuItem implements MenuContainer, Accessible {
             }
 
             int nitems = getItemCount();
-            Vector tempItems = new Vector();
+            Vector<MenuItem> tempItems = new Vector<>();
 
             /* Remove the item at index, nitems-index times
                storing them in a temporary vector in the
@@ -396,7 +396,7 @@ public class Menu extends MenuItem implements MenuContainer, Accessible {
                already in the correct order in the temp vector.
             */
             for (int i = 0; i < tempItems.size()  ; i++) {
-                add((MenuItem)tempItems.elementAt(i));
+                add(tempItems.elementAt(i));
             }
         }
     }
@@ -475,13 +475,13 @@ public class Menu extends MenuItem implements MenuContainer, Accessible {
         return null;
     }
 
-    synchronized Enumeration shortcuts() {
-        Vector shortcuts = new Vector();
+    synchronized Enumeration<MenuShortcut> shortcuts() {
+        Vector<MenuShortcut> shortcuts = new Vector<>();
         int nitems = getItemCount();
         for (int i = 0 ; i < nitems ; i++) {
             MenuItem mi = getItem(i);
             if (mi instanceof Menu) {
-                Enumeration e = ((Menu)mi).shortcuts();
+                Enumeration<MenuShortcut> e = ((Menu)mi).shortcuts();
                 while (e.hasMoreElements()) {
                     shortcuts.addElement(e.nextElement());
                 }

src/share/classes/java/awt/MenuBar.java

@@ -81,7 +81,7 @@ public class MenuBar extends MenuComponent implements MenuContainer, Accessible
                     return menuBar.helpMenu;
                 }
 
-                public Vector getMenus(MenuBar menuBar) {
+                public Vector<Menu> getMenus(MenuBar menuBar) {
                     return menuBar.menus;
                 }
             });
@@ -94,7 +94,7 @@ public class MenuBar extends MenuComponent implements MenuContainer, Accessible
      * @serial
      * @see #countMenus()
      */
-    Vector menus = new Vector();
+    Vector<Menu> menus = new Vector<>();
 
     /**
      * This menu is a special menu dedicated to
@@ -309,7 +309,7 @@ public class MenuBar extends MenuComponent implements MenuContainer, Accessible
      * be called on the toolkit thread.
      */
     final Menu getMenuImpl(int i) {
-        return (Menu)menus.elementAt(i);
+        return menus.elementAt(i);
     }
 
     /**
@@ -321,10 +321,10 @@ public class MenuBar extends MenuComponent implements MenuContainer, Accessible
      * @since       JDK1.1
      */
     public synchronized Enumeration<MenuShortcut> shortcuts() {
-        Vector shortcuts = new Vector();
+        Vector<MenuShortcut> shortcuts = new Vector<>();
         int nmenus = getMenuCount();
         for (int i = 0 ; i < nmenus ; i++) {
-            Enumeration e = getMenu(i).shortcuts();
+            Enumeration<MenuShortcut> e = getMenu(i).shortcuts();
             while (e.hasMoreElements()) {
                 shortcuts.addElement(e.nextElement());
             }
@@ -438,7 +438,7 @@ public class MenuBar extends MenuComponent implements MenuContainer, Accessible
       // HeadlessException will be thrown from MenuComponent's readObject
       s.defaultReadObject();
       for (int i = 0; i < menus.size(); i++) {
-        Menu m = (Menu)menus.elementAt(i);
+        Menu m = menus.elementAt(i);
         m.parent = this;
       }
     }

src/share/classes/java/awt/MenuComponent.java

@@ -290,7 +290,7 @@ public abstract class MenuComponent implements java.io.Serializable {
     public void setFont(Font f) {
         font = f;
         //Fixed 6312943: NullPointerException in method MenuComponent.setFont(Font)
-        MenuComponentPeer peer = (MenuComponentPeer)this.peer;
+        MenuComponentPeer peer = this.peer;
         if (peer != null) {
             peer.setFont(f);
         }
@@ -303,7 +303,7 @@ public abstract class MenuComponent implements java.io.Serializable {
      */
     public void removeNotify() {
         synchronized (getTreeLock()) {
-            MenuComponentPeer p = (MenuComponentPeer)this.peer;
+            MenuComponentPeer p = this.peer;
             if (p != null) {
                 Toolkit.getEventQueue().removeSourceEvents(this, true);
                 this.peer = null;

src/share/classes/java/awt/MenuItem.java

@@ -564,7 +564,7 @@ public class MenuItem extends MenuComponent implements Accessible {
      * @since 1.4
      */
     public synchronized ActionListener[] getActionListeners() {
-        return (ActionListener[])(getListeners(ActionListener.class));
+        return getListeners(ActionListener.class);
     }
 
     /**

src/share/classes/java/awt/RenderingHints.java

@@ -92,7 +92,7 @@ public class RenderingHints
      * {@code equals()} method.
      */
     public abstract static class Key {
-        private static HashMap identitymap = new HashMap(17);
+        private static HashMap<Object,Object> identitymap = new HashMap<>(17);
 
         private String getIdentity() {
             // Note that the identity string is dependent on 3 variables:
@@ -138,7 +138,7 @@ public class RenderingHints
             }
             // Note: Use a weak reference to avoid holding on to extra
             // objects and classes after they should be unloaded.
-            identitymap.put(identity, new WeakReference(k));
+            identitymap.put(identity, new WeakReference<Key>(k));
         }
 
         private int privatekey;
@@ -195,7 +195,7 @@ public class RenderingHints
         }
     }
 
-    HashMap hintmap = new HashMap(7);
+    HashMap<Object,Object> hintmap = new HashMap<>(7);
 
     /**
      * Antialiasing hint key.
@@ -1267,12 +1267,13 @@ public class RenderingHints
      * object.
      * @return a clone of this instance.
      */
+    @SuppressWarnings("unchecked")
     public Object clone() {
         RenderingHints rh;
         try {
             rh = (RenderingHints) super.clone();
             if (hintmap != null) {
-                rh.hintmap = (HashMap) hintmap.clone();
+                rh.hintmap = (HashMap<Object,Object>) hintmap.clone();
             }
         } catch (CloneNotSupportedException e) {
             // this shouldn't happen, since we are Cloneable

src/share/classes/java/awt/datatransfer/Clipboard.java

@@ -71,7 +71,7 @@ public class Clipboard {
      *
      * @since 1.5
      */
-    private Set currentDataFlavors;
+    private Set<DataFlavor> currentDataFlavors;
 
     /**
      * Creates a clipboard object.
@@ -313,7 +313,7 @@ public class Clipboard {
         if (flavorListeners == null) {
             return;
         }
-        Set prevDataFlavors = currentDataFlavors;
+        Set<DataFlavor> prevDataFlavors = currentDataFlavors;
         currentDataFlavors = getAvailableDataFlavorSet();
         if (prevDataFlavors.equals(currentDataFlavors)) {
             return;
@@ -339,8 +339,8 @@ public class Clipboard {
      *
      * @since 1.5
      */
-    private Set getAvailableDataFlavorSet() {
-        Set set = new HashSet();
+    private Set<DataFlavor> getAvailableDataFlavorSet() {
+        Set<DataFlavor> set = new HashSet<>();
         Transferable contents = getContents(null);
         if (contents != null) {
             DataFlavor[] flavors = contents.getTransferDataFlavors();

src/share/classes/java/awt/dnd/DragGestureEvent.java

@@ -165,7 +165,7 @@ public class DragGestureEvent extends EventObject {
      * <P>
      * @return an Iterator for the events comprising the gesture
      */
-
+    @SuppressWarnings("unchecked")
     public Iterator<InputEvent> iterator() { return events.iterator(); }
 
     /**
@@ -184,7 +184,7 @@ public class DragGestureEvent extends EventObject {
      * <P>
      * @return an array of the events comprising the gesture
      */
-
+    @SuppressWarnings("unchecked")
     public Object[] toArray(Object[] array) { return events.toArray(array); }
 
     /**
@@ -333,7 +333,6 @@ public class DragGestureEvent extends EventObject {
         component = (Component)f.get("component", null);
         origin = (Point)f.get("origin", null);
         action = f.get("action", 0);
-
         // Pre-1.4 support. 'events' was previously non-transient
         try {
             events = (List)f.get("events", null);
@@ -351,7 +350,7 @@ public class DragGestureEvent extends EventObject {
     /*
      * fields
      */
-
+    @SuppressWarnings("rawtypes")
     private transient List events;
 
     /**

src/share/classes/java/awt/dnd/DragGestureRecognizer.java

@@ -297,7 +297,7 @@ public abstract class DragGestureRecognizer implements Serializable {
      * @return the initial event that triggered the drag gesture
      */
 
-    public InputEvent getTriggerEvent() { return events.isEmpty() ? null : (InputEvent)events.get(0); }
+    public InputEvent getTriggerEvent() { return events.isEmpty() ? null : events.get(0); }
 
     /**
      * Reset the Recognizer, if its currently recognizing a gesture, ignore

src/share/classes/java/awt/dnd/DragSource.java

@@ -600,7 +600,7 @@ public class DragSource implements Serializable {
      * @since    1.4
      */
     public DragSourceListener[] getDragSourceListeners() {
-        return (DragSourceListener[])getListeners(DragSourceListener.class);
+        return getListeners(DragSourceListener.class);
     }
 
     /**
@@ -660,8 +660,7 @@ public class DragSource implements Serializable {
      * @since    1.4
      */
     public DragSourceMotionListener[] getDragSourceMotionListeners() {
-        return (DragSourceMotionListener[])
-            getListeners(DragSourceMotionListener.class);
+        return getListeners(DragSourceMotionListener.class);
     }
 
     /**
@@ -896,8 +895,8 @@ public class DragSource implements Serializable {
      * @since 1.5
      */
     public static int getDragThreshold() {
-        int ts = ((Integer)AccessController.doPrivileged(
-                new GetIntegerAction("awt.dnd.drag.threshold", 0))).intValue();
+        int ts = AccessController.doPrivileged(
+                new GetIntegerAction("awt.dnd.drag.threshold", 0)).intValue();
         if (ts > 0) {
             return ts;
         } else {

src/share/classes/java/awt/dnd/InvalidDnDOperationException.java

@@ -36,6 +36,8 @@ package java.awt.dnd;
 
 public class InvalidDnDOperationException extends IllegalStateException {
 
+    private static final long serialVersionUID = 5156676500247816278L;
+
     static private String dft_msg = "The operation requested cannot be performed by the DnD system since it is not in the appropriate state";
 
     /**

src/share/classes/java/awt/geom/AffineTransform.java

@@ -876,6 +876,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
      * they have not been cached.
      * @see #getType
      */
+    @SuppressWarnings("fallthrough")
     private void calculateType() {
         int ret = TYPE_IDENTITY;
         boolean sgn0, sgn1;
@@ -1038,6 +1039,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
      * @see #TYPE_UNIFORM_SCALE
      * @since 1.2
      */
+    @SuppressWarnings("fallthrough")
     public double getDeterminant() {
         switch (state) {
         default:
@@ -1250,6 +1252,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             m02 = tx * m00 + ty * m01 + m02;
             m12 = tx * m10 + ty * m11 + m12;
@@ -1631,6 +1634,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
      * Y axis direction
      * @since 1.2
      */
+    @SuppressWarnings("fallthrough")
     public void scale(double sx, double sy) {
         int state = this.state;
         switch (state) {
@@ -1705,6 +1709,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
         case (APPLY_SHEAR | APPLY_SCALE):
             double M0, M1;
@@ -2224,6 +2229,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
      * @see #preConcatenate
      * @since 1.2
      */
+    @SuppressWarnings("fallthrough")
     public void concatenate(AffineTransform Tx) {
         double M0, M1;
         double T00, T01, T10, T11;
@@ -2432,6 +2438,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
      * @see #concatenate
      * @since 1.2
      */
+    @SuppressWarnings("fallthrough")
     public void preConcatenate(AffineTransform Tx) {
         double M0, M1;
         double T00, T01, T10, T11;
@@ -2655,6 +2662,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return null;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             det = m00 * m11 - m01 * m10;
             if (Math.abs(det) <= Double.MIN_VALUE) {
@@ -2751,6 +2759,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             M00 = m00; M01 = m01; M02 = m02;
             M10 = m10; M11 = m11; M12 = m12;
@@ -2885,6 +2894,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return null;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             ptDst.setLocation(x * m00 + y * m01 + m02,
                               x * m10 + y * m11 + m12);
@@ -2968,6 +2978,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
             default:
                 stateError();
                 /* NOTREACHED */
+                return;
             case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
                 dst.setLocation(x * m00 + y * m01 + m02,
                                 x * m10 + y * m11 + m12);
@@ -3043,6 +3054,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             M00 = m00; M01 = m01; M02 = m02;
             M10 = m10; M11 = m11; M12 = m12;
@@ -3157,6 +3169,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             M00 = m00; M01 = m01; M02 = m02;
             M10 = m10; M11 = m11; M12 = m12;
@@ -3252,6 +3265,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             M00 = m00; M01 = m01; M02 = m02;
             M10 = m10; M11 = m11; M12 = m12;
@@ -3347,6 +3361,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             M00 = m00; M01 = m01; M02 = m02;
             M10 = m10; M11 = m11; M12 = m12;
@@ -3436,6 +3451,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
      *                                         inverted.
      * @since 1.2
      */
+    @SuppressWarnings("fallthrough")
     public Point2D inverseTransform(Point2D ptSrc, Point2D ptDst)
         throws NoninvertibleTransformException
     {
@@ -3547,6 +3563,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
             M00 = m00; M01 = m01; M02 = m02;
             M10 = m10; M11 = m11; M12 = m12;
@@ -3679,6 +3696,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return null;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
         case (APPLY_SHEAR | APPLY_SCALE):
             ptDst.setLocation(x * m00 + y * m01, x * m10 + y * m11);
@@ -3754,6 +3772,7 @@ public class AffineTransform implements Cloneable, java.io.Serializable {
         default:
             stateError();
             /* NOTREACHED */
+            return;
         case (APPLY_SHEAR | APPLY_SCALE | APPLY_TRANSLATE):
         case (APPLY_SHEAR | APPLY_SCALE):
             M00 = m00; M01 = m01;