commit 84aa1374c779349db36c3788660633043b7acce5
Author: Giovanni Di Grezia <xgiovio@gmail.com>
Date:   Wed Mar 5 01:13:42 2014 +0100

    Crazione Stack

diff --git a/com/xgiovio/Main.java b/com/xgiovio/Main.java
new file mode 100644
index 0000000..24454ef
--- /dev/null
+++ b/com/xgiovio/Main.java
@@ -0,0 +1,8 @@
+package com.xgiovio;
+
+public class Main {
+
+    public static void main(String[] args) {
+	// write your code here
+    }
+}
diff --git a/exceptions/EmpyStackException.java b/exceptions/EmpyStackException.java
new file mode 100644
index 0000000..847d3ae
--- /dev/null
+++ b/exceptions/EmpyStackException.java
@@ -0,0 +1,14 @@
+package exceptions;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 05/03/14
+ * Time: 0.09
+ */
+public class EmpyStackException extends RuntimeException {
+
+    public EmpyStackException (){
+        super("Stack Empty");
+    }
+}
diff --git a/exceptions/FullStackException.java b/exceptions/FullStackException.java
new file mode 100644
index 0000000..2df4f7a
--- /dev/null
+++ b/exceptions/FullStackException.java
@@ -0,0 +1,14 @@
+package exceptions;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 05/03/14
+ * Time: 0.09
+ */
+public class FullStackException extends RuntimeException {
+
+    public FullStackException(){
+        super("Stack Full");
+    }
+}
diff --git a/stack/DynamicArrayStack.java b/stack/DynamicArrayStack.java
new file mode 100644
index 0000000..fbfe7b0
--- /dev/null
+++ b/stack/DynamicArrayStack.java
@@ -0,0 +1,80 @@
+package stack;
+
+import exceptions.EmpyStackException;
+import exceptions.FullStackException;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 05/03/14
+ * Time: 0.12
+ */
+
+
+public class DynamicArrayStack<E> extends StackRules<E> {
+
+
+    public DynamicArrayStack(){
+
+        stack = (E[])new Object[dcapacity];
+
+    }
+    public DynamicArrayStack(int size){
+
+        stack = (E[])new Object[size];
+
+    }
+
+
+    @Override
+    public void push(E element) throws FullStackException {
+               if (isFull()){
+                   E[] stack2 = (E[])new Object[(stack.length *2)];
+                   for (int i = 0; i<= top; i++){
+                       stack2[i] = stack[i];
+                   }
+                   stack = stack2;
+                   stack[++top] = element;
+               }else{
+                   stack[++top] = element;
+               }
+    }
+
+    @Override
+    public E top() throws EmpyStackException {
+        if (isEmpty())
+            throw new EmpyStackException();
+            return stack[top];
+    }
+
+    @Override
+    public E pop() throws EmpyStackException {
+        if (isEmpty())
+            throw  new EmpyStackException();
+            return stack[top--];
+    }
+
+    @Override
+    public boolean isEmpty() {
+        if (size() < 1)
+            return true;
+            return false;
+    }
+
+    @Override
+    // not used
+    public boolean isFull() {
+            return false;
+    }
+
+    @Override
+    public int size() {
+        return (++top);
+    }
+
+
+    private int top = -1;
+    private int dcapacity = 100;
+    private E[] stack;
+
+}
diff --git a/stack/FixedArrayStack.java b/stack/FixedArrayStack.java
new file mode 100644
index 0000000..7f1c364
--- /dev/null
+++ b/stack/FixedArrayStack.java
@@ -0,0 +1,74 @@
+package stack;
+
+import exceptions.EmpyStackException;
+import exceptions.FullStackException;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 05/03/14
+ * Time: 0.12
+ */
+
+
+public class FixedArrayStack<E> extends StackRules<E> {
+
+
+    public  FixedArrayStack(){
+
+        stack = (E[])new Object[dcapacity];
+
+    }
+    public  FixedArrayStack( int size){
+
+        stack = (E[])new Object[size];
+
+    }
+
+
+    @Override
+    public void push(E element) throws FullStackException {
+               if (isFull())
+                   throw  new FullStackException();
+                   stack[++top] = element;
+    }
+
+    @Override
+    public E top() throws EmpyStackException {
+        if (isEmpty())
+            throw new EmpyStackException();
+            return stack[top];
+    }
+
+    @Override
+    public E pop() throws EmpyStackException {
+        if (isEmpty())
+            throw  new EmpyStackException();
+            return stack[top--];
+    }
+
+    @Override
+    public boolean isEmpty() {
+        if (size() < 1)
+            return true;
+            return false;
+    }
+
+    @Override
+    public boolean isFull() {
+        if (stack.length == (top + 1))
+            return true;
+            return false;
+    }
+
+    @Override
+    public int size() {
+        return (++top);
+    }
+
+
+    private int top = -1;
+    private int dcapacity = 100;
+    private E[] stack;
+
+}
diff --git a/stack/SinglePointerStack.java b/stack/SinglePointerStack.java
new file mode 100644
index 0000000..fcb75ff
--- /dev/null
+++ b/stack/SinglePointerStack.java
@@ -0,0 +1,66 @@
+package stack;
+
+import exceptions.EmpyStackException;
+import exceptions.FullStackException;
+import stack.utility.SinglePointerNode;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 05/03/14
+ * Time: 0.12
+ */
+
+
+public class SinglePointerStack<E> extends StackRules<E> {
+
+    @Override
+    public void push(E element) throws FullStackException {
+        SinglePointerNode<E> temp = new SinglePointerNode<E>(element,stack);
+        stack = temp;
+        ++number_of_elements;
+    }
+
+
+    @Override
+    public E top() throws EmpyStackException {
+        if (isEmpty())
+            throw new EmpyStackException();
+            return stack.getElement();
+    }
+
+    @Override
+    public E pop() throws EmpyStackException {
+        SinglePointerNode<E> to_return;
+        if (isEmpty()) {
+            throw  new EmpyStackException();
+        }else{
+            to_return = stack;
+            stack = stack.getNext();
+            return to_return.getElement();
+        }
+    }
+
+    @Override
+    public boolean isEmpty() {
+        if (size() < 1)
+            return true;
+            return false;
+    }
+
+    @Override
+    // not used
+    public boolean isFull() {
+            return false;
+    }
+
+    @Override
+    public int size() {
+        return number_of_elements;
+    }
+
+
+    private SinglePointerNode<E> stack = null;
+    private int number_of_elements = 0;
+
+}
diff --git a/stack/StackRules.java b/stack/StackRules.java
new file mode 100644
index 0000000..63987db
--- /dev/null
+++ b/stack/StackRules.java
@@ -0,0 +1,21 @@
+package stack;
+
+import exceptions.EmpyStackException;
+import exceptions.FullStackException;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 05/03/14
+ * Time: 0.06
+ */
+public abstract class StackRules <E> {
+
+    public abstract void push (E element) throws FullStackException;
+    public abstract E top () throws EmpyStackException;
+    public abstract E pop () throws  EmpyStackException;
+    public abstract boolean isEmpty();
+    public abstract boolean isFull();
+    public abstract int size();
+
+}
diff --git a/stack/utility/SinglePointerNode.java b/stack/utility/SinglePointerNode.java
new file mode 100644
index 0000000..ebcd9ff
--- /dev/null
+++ b/stack/utility/SinglePointerNode.java
@@ -0,0 +1,41 @@
+package stack.utility;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 05/03/14
+ * Time: 0.49
+ */
+public class SinglePointerNode<E> {
+
+    public  SinglePointerNode (){
+        element = null;
+        next = null;
+
+    }
+
+    public  SinglePointerNode (E in_element, SinglePointerNode<E> in_next){
+        element = in_element;
+        next = in_next;
+    }
+
+    public E getElement() {
+        return element;
+    }
+
+    public void setElement(E element) {
+        this.element = element;
+    }
+
+    public SinglePointerNode<E> getNext() {
+        return next;
+    }
+
+    public void setNext(SinglePointerNode<E> next) {
+        this.next = next;
+    }
+
+    private E element;
+    private SinglePointerNode<E> next;
+
+}