Ass

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ass;

/**
 *
 * @author NgT
 */
import java.util.*;

public class Ass {

    public static int show() {

        System.out.println("1. Add new students");
        System.out.println("2. Search for student based on his/her id");
        System.out.println("3. List all of the students");
        System.out.println("4. Delete student based on student id");
        System.out.println("0. Exit");
        String input;
        Scanner in = new Scanner(System.in);
        int a = 0;
        boolean ck = false;
        while (!ck) {
            try {
                System.out.print("Select your choice: ");
                a = Integer.parseInt(in.nextLine());
                if (a > 4 || a < 0) {
                    throw new Exception();
                }
                ck = true;
            } catch (Exception e) {
                System.out.println("Wrong value!!! Retry");
            }
        }
        System.out.println("");
        return a;
    }

    public static void main(String[] args) throws Exception{
        // TODO code application logic here
        int choice = -1;
        StudentList s = new StudentList();
        while (choice != 0) {
            choice = show();
            switch (choice) {
                case 1:
                    s.addNewStudent();
                    break;
                case 2:
                    s.searchID();
                    break;
                case 3:
                    s.listAllStudent();
                    break;
                case 4:
                    s.deleteID();
                    break;
                default:
                    choice = 0;
            }

        }
    }
}