init with DEFAULT_CAPACITY

Author: realDuYuanChao

DataStructures/Queues/Queues.java

@@ -9,6 +9,11 @@
  *
  */
 class Queue {
+ /**
+ * Default initial capacity.
+ */
+ private static final int DEFAULT_CAPACITY = 10;
+
  /**
  * Max size of the queue
  */
@@ -30,6 +35,13 @@ class Queue {
  */
  private int nItems;
 
+ /**
+ * init with DEFAULT_CAPACITY
+ */
+ public Queue() {
+ this(DEFAULT_CAPACITY);
+ }
+
  /**
  * Constructor
  *

DataStructures/Stacks/StackArray.java

@@ -34,6 +34,11 @@ public static void main(String[] args) {
  System.out.println(myStackArray.peek()); // will print 2
  }
 
+ /**
+ * Default initial capacity.
+ */
+ private static final int DEFAULT_CAPACITY = 10;
+
  /**
  * The max size of the Stack
  */
@@ -49,6 +54,13 @@ public static void main(String[] args) {
  */
  private int top;
 
+ /**
+ * init Stack with DEFAULT_CAPACITY
+ */
+ public StackArray() {
+ this(DEFAULT_CAPACITY);
+ }
+ 
  /**
  * Constructor
  *