--- a/jdk/src/share/classes/javax/swing/text/NumberFormatter.java	Tue Nov 02 15:08:56 2010 +0900
+++ b/jdk/src/share/classes/javax/swing/text/NumberFormatter.java	Tue Nov 02 13:32:00 2010 +0300
@@ -27,7 +27,6 @@
 import java.lang.reflect.*;
 import java.text.*;
 import java.util.*;
-import javax.swing.text.*;
 
 /**
  * <code>NumberFormatter</code> subclasses <code>InternationalFormatter</code>
@@ -132,7 +131,7 @@
         DecimalFormatSymbols dfs = getDecimalFormatSymbols();
 
         if (dfs != null) {
-            StringBuffer sb = new StringBuffer();
+            StringBuilder sb = new StringBuilder();
 
             sb.append(dfs.getCurrencySymbol());
             sb.append(dfs.getDecimalSeparator());
@@ -240,13 +239,6 @@
     }
 
     /**
-     */
-    private boolean isValidInsertionCharacter(char aChar) {
-        return (Character.isDigit(aChar) || specialChars.indexOf(aChar) != -1);
-    }
-
-
-    /**
      * Subclassed to return false if <code>text</code> contains in an invalid
      * character to insert, that is, it is not a digit
      * (<code>Character.isDigit()</code>) and
@@ -403,28 +395,6 @@
     }
 
     /**
-     * Returns true if the range offset to length identifies the only
-     * integer field.
-     */
-    private boolean isOnlyIntegerField(int offset, int length) {
-        if (isValidMask()) {
-            int start = getAttributeStart(NumberFormat.Field.INTEGER);
-
-            if (start != -1) {
-                AttributedCharacterIterator iterator = getIterator();
-
-                iterator.setIndex(start);
-                if (offset > start || iterator.getRunLimit(
-                    NumberFormat.Field.INTEGER) > (offset + length)) {
-                    return false;
-                }
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
      * Invoked to toggle the sign. For this to work the value class
      * must have a single arg constructor that takes a String.
      */