Reallocation by "copyOf"

Renaiming variable to initialCapacity for the sake of better
comprehension

P/Sd1/Array/integerStoreUnbounded/src/main/java/de/hdm_stuttgart/mi/sd1/store/IntegerStore.java

 package de.hdm_stuttgart.mi.sd1.store;
 
+import java.util.Arrays;
+
 /**
  * A container holding a fixed
  *  number of integer values.
@@ -7,7 +9,7 @@ package de.hdm_stuttgart.mi.sd1.store;
  */
 public class IntegerStore {
   
-  final static int defaultCapacity = 4;
+  final static int initialCapacity = 4;
   long[] values ;         // Array containing our values
   int numValues = 0;     // Number of values present in the container so far.
   
@@ -17,7 +19,7 @@ public class IntegerStore {
    * 
    */
   public IntegerStore() {
-    values = new long[defaultCapacity];
+    values = new long[initialCapacity];
   }
   /**
    * Create a new store being able to
@@ -56,11 +58,7 @@ public class IntegerStore {
    */
   public void addValue(long value) {
     if (values.length <= numValues) { // Sufficient capacity available to add a new value?
-      final long[] currentArray = values;
-      values = new long[2 * currentArray.length]; // Double the current array's size.
-      for (int i = 0; i < currentArray.length; i++) {
-        values[i] = currentArray[i];
-      }
+      values = Arrays.copyOf(values, 2 * values.length); // Double the current array's size.
     } 
     values[numValues++] = value; 
   }