How to Create a POJO? Also no preview button to view errors.

  public class Contact {
    private int id;
    private String firstName;
    private String lastName;
    private String email;

  public Contact(int id, String firstName, String lastName, String email) {
    this.id = id;
    this.firstName = firstName;
    this.lastName = lastName;
    this.email = email;
  }

  public int getId() {
    return id; 
  }

  public int setId(id) {
    this.id = id;
  }

  public String getFirstName() {
     return firstName;
  }

  public String setFirstName(firstName) {
    this.firstName = firstName;
  }

  public String getLastName() {
    return lastName;
  }

  public String setLastName(lastName) {
    this.lastName = lastName;
  }

  public String getEmail() {
    return email;
  }

  public String setEmail(email) {
    this.email = email;
  } 
}