public class Stack
{

    private int top;
    private int maxSize;
    private char[] stackArray;

    public Stack(int s)
    {
       maxSize=s;
       stackArray=new char[maxSize];
       top=-1;
    }

    private void printStack()
    {
        System.out.println("|_"+pop()+"_|");
    }

    public void push(char m)
    {
       stackArray[++top]=m;
      printStack();
    }

    public char pop()
    {
        return stackArray[top--];
        printStack();
    }

    public char peek()
    {
        return stackArray[top];
        printStack();
    }

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

     public boolean isStackFull()
     {
        return (top == maxSize - 1);
        printStack();
     }
}