Update SDK codebase to JDK 6

This changeset makes the SDK codebase compile with source=1.6 (which
means it also requires JDK 6). This means that methods implementing an
interface requires @Override's. It also means we can start using APIs
like the ArrayDeque class and methods like String#isEmpty().

This changeset looks big but the change is trivial: it's basically
adding @Override in all the places that need it, along with some other
automatic Eclipse cleanup in certain files (such as reordering imports
where they were incorrectly ordered (because older versions of Eclipse
didn't always handle inner classes right)), as well as cleaning up
trailing whitespace and removing some $NON-NLS-1$ markers on lines
where there aren't any string literals anymore.

This changeset also sets the source and target JDK level to 6 in the
Eclipse compiler .settings file, and synchronizes this file to all the
other Eclipse SDK projects.

Change-Id: I6a9585aa44c3dee9a5c00739ab22fbdbcb9f8275

2 files changed, 19 insertions, 0 deletions

diff --git a/rule_api/src/com/android/ide/common/api/AbstractViewRule.java b/rule_api/src/com/android/ide/common/api/AbstractViewRule.java
index e915e2c..86e7896 100644
--- a/rule_api/src/com/android/ide/common/api/AbstractViewRule.java
+++ b/rule_api/src/com/android/ide/common/api/AbstractViewRule.java
@@ -29,13 +29,16 @@ import java.util.List;
  */
 @Beta
 public class AbstractViewRule implements IViewRule {
+    @Override
     public boolean onInitialize(String fqcn, IClientRulesEngine engine) {
         return true;
     }
 
+    @Override
     public void onDispose() {
     }
 
+    @Override
     public String getDisplayName() {
         // Default is to not override the selection display name.
         return null;
@@ -43,17 +46,21 @@ public class AbstractViewRule implements IViewRule {
 
     // ==== Selection ====
 
+    @Override
     public List<String> getSelectionHint(INode parentNode, INode childNode) {
         return null;
     }
 
+    @Override
     public void addLayoutActions(List<RuleAction> actions, INode parentNode,
             List<? extends INode> children) {
     }
 
+    @Override
     public void addContextMenuActions(List<RuleAction> actions, INode node) {
     }
 
+    @Override
     public void paintSelectionFeedback(IGraphics graphics, INode parentNode,
             List<? extends INode> childNodes, Object view) {
     }
@@ -61,19 +68,23 @@ public class AbstractViewRule implements IViewRule {
     // ==== Drag & drop support ====
 
     // By default Views do not accept drag'n'drop.
+    @Override
     public DropFeedback onDropEnter(INode targetNode, Object targetView, IDragElement[] elements) {
         return null;
     }
 
+    @Override
     public DropFeedback onDropMove(INode targetNode, IDragElement[] elements,
             DropFeedback feedback, Point p) {
         return null;
     }
 
+    @Override
     public void onDropLeave(INode targetNode, IDragElement[] elements, DropFeedback feedback) {
         // ignore
     }
 
+    @Override
     public void onDropped(
             INode targetNode,
             IDragElement[] elements,
@@ -83,31 +94,38 @@ public class AbstractViewRule implements IViewRule {
     }
 
 
+    @Override
     public void onPaste(INode targetNode, Object targetView, IDragElement[] pastedElements) {
     }
 
     // ==== Create/Remove hooks ====
 
+    @Override
     public void onCreate(INode node, INode parent, InsertType insertType) {
     }
 
+    @Override
     public void onChildInserted(INode child, INode parent, InsertType insertType) {
     }
 
+    @Override
     public void onRemovingChildren(List<INode> deleted, INode parent) {
     }
 
     // ==== Resizing ====
 
+    @Override
     public DropFeedback onResizeBegin(INode child, INode parent, SegmentType horizontalEdge,
             SegmentType verticalEdge, Object childView, Object parentView) {
         return null;
     }
 
+    @Override
     public void onResizeUpdate(DropFeedback feedback, INode child, INode parent, Rect newBounds,
             int modifierMask) {
     }
 
+    @Override
     public void onResizeEnd(DropFeedback feedback, INode child, final INode parent,
             final Rect newBounds) {
     }
diff --git a/rule_api/src/com/android/ide/common/api/RuleAction.java b/rule_api/src/com/android/ide/common/api/RuleAction.java
index 71a6ac9..5b6dc7f 100755
--- a/rule_api/src/com/android/ide/common/api/RuleAction.java
+++ b/rule_api/src/com/android/ide/common/api/RuleAction.java
@@ -397,6 +397,7 @@ public class RuleAction implements Comparable<RuleAction> {
     }
 
     // Implements Comparable<MenuAciton>
+    @Override
     public int compareTo(RuleAction other) {
         if (mSortPriority != other.mSortPriority) {
             return mSortPriority - other.mSortPriority;