public User findByName(String name) {
for (User user : users) {
if (user.getName().equalsIgnoreCase(name)) {
return user;
}
}
return null;
}
public User findById(long id) {
for (User user : users) {
if (user.getId() == id) {
return user;
}
}
return null;
}
public void deleteUserById(long id) {
for (Iterator<User> iterator = users.iterator(); iterator.hasNext(); ) {
User user = iterator.next();
if (user.getId() == id) {
iterator.remove();
}
}
}
public boolean isUserExist(User user) {
return findByName(user.getName()) != null;
}
public void saveUser(User user) {
user.setId(counter.incrementAndGet());
users.add(user);
}