EmployeeCRUDAPI.java

package com.mar1;

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 EmployeeCRUDAPI {
	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) {
			// Insert Operation
			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));
				System.out.println("---------------------");
				System.out.println("Record Inserted Sucessfully");
				System.out.println("---------------------");
				break;
			// Display Operation
			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;
			// Search Opeartion
			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;
			// Delete Operation
			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 Sucessfully");
				}
				System.out.println("---------------------");
				break;
			// Update Opeartion
			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;
					}
				}
				System.out.println("---------------------");
				if (!found) {
					System.out.println("Record Not Found");
				} else {
					System.out.println("Record is Updated Sucessfully");
				}
				System.out.println("---------------------");
				break;
			}
		} while (ch != 0);
	}

}