Stack Push(), Pop()

import java.util.*;
import java.lang.*;
public class AllDataStructure{

    public static Scanner scan = new Scanner(System.in);
    public static int array[] = new int[5];
    public static int choice;
    public static int elementToPush;
    public static int countIndex=-1;
    public static String takeAnswer;

    public static void push(int item){
        try
        {
               array[countIndex] = item;
                printArray();
        }catch(ArrayIndexOutOfBoundsException e){
         System.out.println("Stack Overflow");
        }
    }

    public static void pop(){
        if(countIndex==-1){
            System.out.println("Stack Underflow");
        }else{
        countIndex=countIndex-1;
        printArray();
        }
    }

    public static void printArray(){
        for (int i=0;i<countIndex+1;i++) {
            System.out.print(array[i]+" ");
        }
        System.out.println("");
    }

    public static void chooseOperation(){

        switch (choice)
        {

            case 1: System.out.print("Enter element to be pushed: ");
                    countIndex=countIndex+1;
                    elementToPush = scan.nextInt();
                    push(elementToPush);
                    break;

            case 2: pop();
                    break;
        }

    }


    public static void main(String[] args) {

         System.out.print("Which operation do you want to do?\n1. Push \n2. Pop\n");
         choice=scan.nextInt();
         chooseOperation();
         System.out.print("Which operation do you want to do?\n1. Push \n2. Pop\n");
         choice=scan.nextInt();
         chooseOperation();
         System.out.print("Which operation do you want to do?\n1. Push \n2. Pop\n");
         choice=scan.nextInt();
         chooseOperation();
         System.out.print("Which operation do you want to do?\n1. Push \n2. Pop\n");
         choice=scan.nextInt();
         chooseOperation();
         System.out.print("Which operation do you want to do?\n1. Push \n2. Pop\n");
         choice=scan.nextInt();
         chooseOperation();
         System.out.print("Which operation do you want to do?\n1. Push \n2. Pop\n");
         choice=scan.nextInt();
         chooseOperation();

    }
}