Coding Recipies: Stack

public class Stack {

 int arr[];

 private static final int DEFAULT_CAPACITY = 10;

 public static int top = -1;

  

 public Stack() {

  arr = new int[DEFAULT_CAPACITY];

 }

  

 public Stack(int size) {

  arr = new int[size];

 }

 

 public void push(int data) {

  arr[++top] = data;

 }

 public int pop() {

  return arr[top--];

 }

 

 public int peek() {

           return arr[top];

 }

  

 public boolean isEmpty() {

  if(top==-1)

   return true;

  return false;

 }

}

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