DataStructure/StackImplemetation at master · AkashMishraa/DataStructure · GitHub

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package com.akash.mishra;

/**
 *
 * @author Akash
 */
public class StackImplement {

    private static final int stackSize = 5;
    int[] array = new int[stackSize];
    int top = -1;

    public void push(int stackElement){
        if(top < stackSize-1 )
        {
            top++;
        array[top] = stackElement;
    } else {

            System.out.println("Stack is overflow");

        }
    }

    public void pop(){

        if(top >= 0){

            top--;

        } else{

            System.out.println("Stack is underflow");

        }
    }

    public void printStack(){

        if(top >= 0){

            for(int i = 0; i <= top; i++){

                System.out.println(array[i]);

            }
        }
    }
    public static void main(String args[]){

        StackImplement si = new StackImplement();
        si.push(5);
        si.push(6);
        si.push(7);
        si.push(8);
        si.push(9);
        si.pop();
        si.pop();
        si.printStack();
    }
}