Use valueOf() to convert primitive to wrapper class

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@830016 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/lang/mutable/MutableBoolean.java

@@ -80,6 +80,17 @@ public class MutableBoolean implements Mutable<Boolean>, Serializable, Comparabl
         return value;
     }
 
+    //-----------------------------------------------------------------------
+    /**
+     * Gets this mutable as an instance of Boolean.
+     *
+     * @return a Boolean instance containing the value from this mutable, never null
+     */
+    public Boolean toBoolean() {
+        return Boolean.valueOf(booleanValue());
+    }
+
+    //-----------------------------------------------------------------------
     /**
      * Compares this mutable to another in ascending order.
      * 

src/java/org/apache/commons/lang/mutable/MutableDouble.java

@@ -175,10 +175,10 @@ public class MutableDouble extends Number implements Comparable<MutableDouble>,
     /**
      * Gets this mutable as an instance of Double.
      *
-     * @return a Double instance containing the value from this mutable
+     * @return a Double instance containing the value from this mutable, never null
      */
     public Double toDouble() {
-        return new Double(doubleValue());
+        return Double.valueOf(doubleValue());
     }
 
     //-----------------------------------------------------------------------

src/java/org/apache/commons/lang/mutable/MutableFloat.java

@@ -247,10 +247,10 @@ public class MutableFloat extends Number implements Comparable<MutableFloat>, Mu
     /**
      * Gets this mutable as an instance of Float.
      *
-     * @return a Float instance containing the value from this mutable
+     * @return a Float instance containing the value from this mutable, never null
      */
     public Float toFloat() {
-        return new Float(floatValue());
+        return Float.valueOf(floatValue());
     }
 
     //-----------------------------------------------------------------------

src/java/org/apache/commons/lang/mutable/MutableInt.java

@@ -231,10 +231,10 @@ public class MutableInt extends Number implements Comparable<MutableInt>, Mutabl
     /**
      * Gets this mutable as an instance of Integer.
      *
-     * @return a Integer instance containing the value from this mutable
+     * @return a Integer instance containing the value from this mutable, never null
      */
     public Integer toInteger() {
-        return new Integer(intValue());
+        return Integer.valueOf(intValue());
     }
 
     //-----------------------------------------------------------------------

src/java/org/apache/commons/lang/mutable/MutableLong.java

@@ -229,10 +229,10 @@ public class MutableLong extends Number implements Comparable<MutableLong>, Muta
     /**
      * Gets this mutable as an instance of Long.
      *
-     * @return a Long instance containing the value from this mutable
+     * @return a Long instance containing the value from this mutable, never null
      */
     public Long toLong() {
-        return new Long(longValue());
+        return Long.valueOf(longValue());
     }
 
     //-----------------------------------------------------------------------

src/java/org/apache/commons/lang/mutable/MutableShort.java

@@ -239,10 +239,10 @@ public class MutableShort extends Number implements Comparable<MutableShort>, Mu
     /**
      * Gets this mutable as an instance of Short.
      *
-     * @return a Short instance containing the value from this mutable
+     * @return a Short instance containing the value from this mutable, never null
      */
     public Short toShort() {
-        return new Short(shortValue());
+        return Short.valueOf(shortValue());
     }
 
     //-----------------------------------------------------------------------

src/test/org/apache/commons/lang/mutable/MutableBooleanTest.java

@@ -95,11 +95,15 @@ public class MutableBooleanTest extends TestCase {
     }
 
     public void testGetSet() {
-        final MutableBoolean mutBool = new MutableBoolean(false);
         assertEquals(false, new MutableBoolean().booleanValue());
         assertEquals(Boolean.FALSE, new MutableBoolean().getValue());
+        
+        final MutableBoolean mutBool = new MutableBoolean(false);
+        assertEquals(Boolean.FALSE, mutBool.toBoolean());
+        assertEquals(false, mutBool.booleanValue());
 
         mutBool.setValue(Boolean.TRUE);
+        assertEquals(Boolean.TRUE, mutBool.toBoolean());
         assertEquals(true, mutBool.booleanValue());
 
         mutBool.setValue(false);