Source Code of Video Java Collection - CRUD Operation (INSERT, UPDATE, DELETE, SEARCH and DISPLAY of Employee Collection)

/*Source code of Video Java Collection - CRUD Operation

INSERT, UPDATE, DELETE, SEARCH and DISPLAY of Employee Collection*/

 import java.util.*;

class Employee{
   private int empno;
   private String ename;
   private int salary;

   Employee(int empno, String ename, int salary){
      this.empno = empno;
      this.ename = ename;
      this.salary = salary;
   }

   public int getEmpno(){
      return empno;
   }
   public int getSalary(){
      return salary;
   }
   public String getEname(){
      return ename;
   }

   public String toString(){
      return empno+" "+ename+" "+salary;
   }
}

class CRUDDemo{
   public static void main(String[] args) {
      
      List<Employee> c = new ArrayList<Employee>();
      Scanner s = new Scanner(System.in);
      Scanner s1 = new Scanner(System.in);
      int ch;
      do{
         System.out.println("1.INSERT");
         System.out.println("2.DISPLAY");
         System.out.println("3.SEARCH");
         System.out.println("4.DELETE");
         System.out.println("5.UPDATE");
         System.out.print("Enter Your Choice : ");
         ch = s.nextInt();

         switch(ch){
            case 1:
               System.out.print("Enter Empno : ");
               int eno = s.nextInt();
               System.out.print("Enter EmpName : ");
               String ename = s1.nextLine();
               System.out.print("Enter Salary : ");
               int salary = s.nextInt();

               c.add(new Employee(eno,ename,salary));
            break;
            case 2:
               System.out.println("----------------------------");
               Iterator<Employee> i = c.iterator();
               while(i.hasNext()){
                  Employee e = i.next(); 
                  System.out.println(e);
               }
               System.out.println("----------------------------");
            break;
            case 3:
               boolean found = false;
               System.out.print("Enter Empno to Search :");
               int empno = s.nextInt();
               System.out.println("----------------------------");
               i = c.iterator();
               while(i.hasNext()){
                  Employee e = i.next();
                  if(e.getEmpno() == empno)  {
                     System.out.println(e);
                     found = true;
                  }
               }
               
               if(!found){
                  System.out.println("Record Not Found");
               }
               System.out.println("----------------------------");
            break;

            case 4:
               found = false;
               System.out.print("Enter Empno to Delete :");
               empno = s.nextInt();
               System.out.println("----------------------------");
               i = c.iterator();
               while(i.hasNext()){
                  Employee e = i.next();
                  if(e.getEmpno() == empno)  {
                     i.remove();
                     found = true;
                  }
               }
               
               if(!found){
                  System.out.println("Record Not Found");
               }else{
                  System.out.println("Record is Deleted Successfully...!");
               }

               System.out.println("----------------------------");
            break;
            case 5:
               found = false;
               System.out.print("Enter Empno to Update :");
               empno = s.nextInt();
               
               ListIterator<Employee>li = c.listIterator();
               while(li.hasNext()){
                  Employee e = li.next();
                  if(e.getEmpno() == empno)  {
                     System.out.print("Enter new Name : ");
                     ename = s1.nextLine();

                     System.out.print("Enter new Salary : ");
                     salary = s.nextInt();
                     li.set(new Employee(empno,ename,salary));
                     found = true;
                  }
               }
               
               if(!found){
                  System.out.println("Record Not Found");
               }else{
                  System.out.println("Record is Updated Successfully...!");
               }

               
            break;

            
         }
      }while(ch!=0);
   }
}