MyStack.java

package com.nifrasismail.Stack;

public class MyStack {
	private int size;
	private int[] StackHolder;
	private int top;

	public MyStack(int size) {
		this.size = size;
		StackHolder = new int[size];
		top = -1;
	}

	public void push(int element) {
		if (!isFull()) {
			top++;
			StackHolder[top] = element;
		}
	}

	public int peek() {
		return StackHolder[top];
	}

	public int pop() {
		return StackHolder[top--];
	}

	public Boolean isEmpty() {
		return (top == -1);
	}

	public Boolean isFull() {
		return (top == size - 1);
	}

}

UseStack.java

package com.nifrasismail.Stack;

public class UseStack {
	public static void main(String[] args){
		MyStack S = new MyStack(20); //[] top=-1
		S.push(25); // [20] top =0
		S.push(35); // [20,35] top=1
		S.push(22); // [20,35,22] top=2
		
		System.out.println("Current Peek Value is : "+S.peek());
		
		S.push(99); // [20,35,22,99] top=3
		S.push(82); // [20,35,22,99,82] top=4
		
		S.pop(); // [20,35,22,99] top=3
		S.pop(); // [20,35,22,99] top=2
		
		while(!S.isEmpty()){
			System.out.println("Poped Element "+ S.pop());
		}
	}

}