Stack.java

public class Stack {

    int[] arrs;
     int top;
     int size;

     public Stack(){ 
        arrs = new int[5];
        top = -1;
        size = arrs.length;

     }

     //push element in stack
     public void push(int data){
        
        if(top < size )
           arrs[++top] = data;
        else
            System.out.println("Stack overflow  " + data);
 
    }


    //to pop the element in the stack
    public void pop(){
        if(top == -1){
         System.out.println("Stack underflow");
        }
        else{
        arrs[top--] = 0;
         
        }
    }

    //to print peek element 
    public int peek(){
         return arrs[top];
    }

     //print element in stack
     void display(){
        for (int arr:arrs){
            System.out.print(arr+" ");
        }
        System.out.println();
     }


}