6776095: Code improvement and warnings removing from swing packages

Reviewed-by: malenkov
Contributed-by: NFlorian Brunner <fbrunnerlist@gmx.ch>

src/share/classes/com/sun/java/swing/plaf/gtk/GTKFileChooserUI.java

@@ -263,13 +263,13 @@ class GTKFileChooserUI extends SynthFileChooserUI {
         ListSelectionModel sm = directoryList.getSelectionModel();
         if (sm instanceof DefaultListSelectionModel) {
             ((DefaultListSelectionModel)sm).moveLeadSelectionIndex(0);
-            ((DefaultListSelectionModel)sm).setAnchorSelectionIndex(0);
+            sm.setAnchorSelectionIndex(0);
         }
         fileList.clearSelection();
         sm = fileList.getSelectionModel();
         if (sm instanceof DefaultListSelectionModel) {
             ((DefaultListSelectionModel)sm).moveLeadSelectionIndex(0);
-            ((DefaultListSelectionModel)sm).setAnchorSelectionIndex(0);
+            sm.setAnchorSelectionIndex(0);
         }
 
         File currentDirectory = getFileChooser().getCurrentDirectory();
@@ -1073,7 +1073,7 @@ class GTKFileChooserUI extends SynthFileChooserUI {
      * Data model for a type-face selection combo-box.
      */
     protected class DirectoryComboBoxModel extends AbstractListModel implements ComboBoxModel {
-        Vector directories = new Vector();
+        Vector<File> directories = new Vector<File>();
         File selectedDirectory = null;
         JFileChooser chooser = getFileChooser();
         FileSystemView fsv = chooser.getFileSystemView();
@@ -1215,7 +1215,7 @@ class GTKFileChooserUI extends SynthFileChooserUI {
                     ListSelectionModel sm = fileList.getSelectionModel();
                     if (sm instanceof DefaultListSelectionModel) {
                         ((DefaultListSelectionModel)sm).moveLeadSelectionIndex(0);
-                        ((DefaultListSelectionModel)sm).setAnchorSelectionIndex(0);
+                        sm.setAnchorSelectionIndex(0);
                     }
                     rescanCurrentDirectory(getFileChooser());
                     return;

src/share/classes/com/sun/java/swing/plaf/gtk/GTKLookAndFeel.java

@@ -1470,7 +1470,7 @@ public class GTKLookAndFeel extends SynthLookAndFeel {
         aaTextInfo = SwingUtilities2.AATextInfo.getAATextInfo(gtkAAFontSettingsCond);
     }
 
-    static ReferenceQueue queue = new ReferenceQueue();
+    static ReferenceQueue<GTKLookAndFeel> queue = new ReferenceQueue<GTKLookAndFeel>();
 
     private static void flushUnreferenced() {
         WeakPCL pcl;
@@ -1480,12 +1480,12 @@ public class GTKLookAndFeel extends SynthLookAndFeel {
         }
     }
 
-    static class WeakPCL extends WeakReference implements
+    static class WeakPCL extends WeakReference<GTKLookAndFeel> implements
             PropertyChangeListener {
         private Toolkit kit;
         private String key;
 
-        WeakPCL(Object target, Toolkit kit, String key) {
+        WeakPCL(GTKLookAndFeel target, Toolkit kit, String key) {
             super(target, queue);
             this.kit = kit;
             this.key = key;
@@ -1494,7 +1494,7 @@ public class GTKLookAndFeel extends SynthLookAndFeel {
         public String getKey() { return key; }
 
         public void propertyChange(final PropertyChangeEvent pce) {
-            final GTKLookAndFeel lnf = (GTKLookAndFeel)get();
+            final GTKLookAndFeel lnf = get();
 
             if (lnf == null || UIManager.getLookAndFeel() != lnf) {
                 // The property was GC'ed, we're no longer interested in

src/share/classes/javax/swing/ImageIcon.java

@@ -86,7 +86,7 @@ public class ImageIcon implements Icon, Serializable, Accessible {
 
     static {
         component = new Component() {};
-        AccessController.doPrivileged(new PrivilegedAction() {
+        AccessController.doPrivileged(new PrivilegedAction<Object>() {
             public Object run() {
                 try {
                     // 6482575 - clear the appContext field so as not to leak it

src/share/classes/javax/swing/ProgressMonitor.java

@@ -78,7 +78,7 @@ import javax.swing.text.*;
  * @author James Gosling
  * @author Lynn Monsanto (accessibility)
  */
-public class ProgressMonitor extends Object implements Accessible
+public class ProgressMonitor implements Accessible
 {
     private ProgressMonitor root;
     private JDialog         dialog;
@@ -186,7 +186,7 @@ public class ProgressMonitor extends Object implements Accessible
             }
             if (window instanceof SwingUtilities.SharedOwnerFrame) {
                 WindowListener ownerShutdownListener =
-                    (WindowListener)SwingUtilities.getSharedOwnerFrameShutdownListener();
+                        SwingUtilities.getSharedOwnerFrameShutdownListener();
                 dialog.addWindowListener(ownerShutdownListener);
             }
             Container contentPane = dialog.getContentPane();
@@ -273,7 +273,7 @@ public class ProgressMonitor extends Object implements Accessible
                 if (dT >= millisToDecideToPopup) {
                     int predictedCompletionTime;
                     if (nv > min) {
-                        predictedCompletionTime = (int)((long)dT *
+                        predictedCompletionTime = (int)(dT *
                                                         (max - min) /
                                                         (nv - min));
                     }
@@ -691,10 +691,7 @@ public class ProgressMonitor extends Object implements Accessible
          * object does not have an Accessible parent
          */
         public Accessible getAccessibleParent() {
-            if (dialog != null) {
-                return (Accessible)dialog;
-            }
-            return null;
+            return dialog;
         }
 
         /*
@@ -768,7 +765,7 @@ public class ProgressMonitor extends Object implements Accessible
             if (myBar != null) {
                 Component c = myBar.getParent();
                 if (c instanceof Accessible) {
-                    return ((Accessible)c).getAccessibleContext();
+                    return c.getAccessibleContext();
                 }
             }
             return null;

src/share/classes/javax/swing/SwingWorker.java

@@ -282,7 +282,7 @@ public abstract class SwingWorker<T, V> implements RunnableFuture<T> {
          * is finished.
          */
         DONE
-    };
+    }
 
     /**
      * Constructs this {@code SwingWorker}.
@@ -825,7 +825,7 @@ public abstract class SwingWorker<T, V> implements RunnableFuture<T> {
     }
     private static class DoSubmitAccumulativeRunnable
           extends AccumulativeRunnable<Runnable> implements ActionListener {
-        private final static int DELAY = (int) (1000 / 30);
+        private final static int DELAY = 1000 / 30;
         @Override
         protected void run(List<Runnable> args) {
             for (Runnable runnable : args) {

src/share/classes/javax/swing/colorchooser/DefaultColorSelectionModel.java

@@ -128,8 +128,7 @@ public class DefaultColorSelectionModel implements ColorSelectionModel, Serializ
      * @since 1.4
      */
     public ChangeListener[] getChangeListeners() {
-        return (ChangeListener[])listenerList.getListeners(
-                ChangeListener.class);
+        return listenerList.getListeners(ChangeListener.class);
     }
 
     /**

src/share/classes/javax/swing/table/DefaultTableColumnModel.java

@@ -190,7 +190,7 @@ public class DefaultTableColumnModel implements TableColumnModel,
             fireColumnMoved(new TableColumnModelEvent(this, columnIndex, newIndex));
             return;
         }
-        aColumn = (TableColumn)tableColumns.elementAt(columnIndex);
+        aColumn = tableColumns.elementAt(columnIndex);
 
         tableColumns.removeElementAt(columnIndex);
         boolean selected = selectionModel.isSelectedIndex(columnIndex);
@@ -291,7 +291,7 @@ public class DefaultTableColumnModel implements TableColumnModel,
      *                          at <code>columnIndex</code>
      */
     public TableColumn getColumn(int columnIndex) {
-        return (TableColumn)tableColumns.elementAt(columnIndex);
+        return tableColumns.elementAt(columnIndex);
     }
 
     /**
@@ -504,8 +504,7 @@ public class DefaultTableColumnModel implements TableColumnModel,
      * @since 1.4
      */
     public TableColumnModelListener[] getColumnModelListeners() {
-        return (TableColumnModelListener[])listenerList.getListeners(
-                TableColumnModelListener.class);
+        return listenerList.getListeners(TableColumnModelListener.class);
     }
 
 //

src/share/classes/javax/swing/tree/DefaultMutableTreeNode.java

@@ -84,7 +84,7 @@ import java.util.*;
  *
  * @author Rob Davis
  */
-public class DefaultMutableTreeNode extends Object implements Cloneable,
+public class DefaultMutableTreeNode implements Cloneable,
        MutableTreeNode, Serializable
 {
     private static final long serialVersionUID = -4298474751201349152L;
@@ -1251,7 +1251,7 @@ public class DefaultMutableTreeNode extends Object implements Cloneable,
      * @return  a copy of this node
      */
     public Object clone() {
-        DefaultMutableTreeNode newNode = null;
+        DefaultMutableTreeNode newNode;
 
         try {
             newNode = (DefaultMutableTreeNode)super.clone();
@@ -1297,24 +1297,22 @@ public class DefaultMutableTreeNode extends Object implements Cloneable,
             userObject = tValues[1];
     }
 
-    final class PreorderEnumeration implements Enumeration<TreeNode> {
-        protected Stack stack;
+    private final class PreorderEnumeration implements Enumeration<TreeNode> {
+        private final Stack<Enumeration> stack = new Stack<Enumeration>();
 
         public PreorderEnumeration(TreeNode rootNode) {
             super();
-            Vector v = new Vector(1);
+            Vector<TreeNode> v = new Vector<TreeNode>(1);
             v.addElement(rootNode);     // PENDING: don't really need a vector
-            stack = new Stack();
             stack.push(v.elements());
         }
 
         public boolean hasMoreElements() {
-            return (!stack.empty() &&
-                    ((Enumeration)stack.peek()).hasMoreElements());
+            return (!stack.empty() && stack.peek().hasMoreElements());
         }
 
         public TreeNode nextElement() {
-            Enumeration enumer = (Enumeration)stack.peek();
+            Enumeration enumer = stack.peek();
             TreeNode    node = (TreeNode)enumer.nextElement();
             Enumeration children = node.children();
 
@@ -1353,8 +1351,7 @@ public class DefaultMutableTreeNode extends Object implements Cloneable,
             if (subtree.hasMoreElements()) {
                 retval = subtree.nextElement();
             } else if (children.hasMoreElements()) {
-                subtree = new PostorderEnumeration(
-                                (TreeNode)children.nextElement());
+                subtree = new PostorderEnumeration(children.nextElement());
                 retval = subtree.nextElement();
             } else {
                 retval = root;
@@ -1373,7 +1370,7 @@ public class DefaultMutableTreeNode extends Object implements Cloneable,
 
         public BreadthFirstEnumeration(TreeNode rootNode) {
             super();
-            Vector v = new Vector(1);
+            Vector<TreeNode> v = new Vector<TreeNode>(1);
             v.addElement(rootNode);     // PENDING: don't really need a vector
             queue = new Queue();
             queue.enqueue(v.elements());

src/share/classes/javax/swing/undo/CompoundEdit.java

@@ -59,7 +59,7 @@ public class CompoundEdit extends AbstractUndoableEdit {
         super.undo();
         int i = edits.size();
         while (i-- > 0) {
-            UndoableEdit e = (UndoableEdit)edits.elementAt(i);
+            UndoableEdit e = edits.elementAt(i);
             e.undo();
         }
     }
@@ -85,7 +85,7 @@ public class CompoundEdit extends AbstractUndoableEdit {
     protected UndoableEdit lastEdit() {
         int count = edits.size();
         if (count > 0)
-            return (UndoableEdit)edits.elementAt(count-1);
+            return edits.elementAt(count-1);
         else
             return null;
     }
@@ -98,7 +98,7 @@ public class CompoundEdit extends AbstractUndoableEdit {
         int size = edits.size();
         for (int i = size-1; i >= 0; i--)
         {
-            UndoableEdit e = (UndoableEdit)edits.elementAt(i);
+            UndoableEdit e = edits.elementAt(i);
 //          System.out.println("CompoundEdit(" + i + "): Discarding " +
 //                             e.getUndoPresentationName());
             e.die();