package com.xxxcom.model; import java.util.concurrent.atomic.AtomicInteger; public class Users { private static final AtomicInteger COUNTER = new AtomicInteger(1); private final Integer id; public Integer getId() { return id; } public Users() { this.id = COUNTER.getAndIncrement(); } public String getName() { return name; } public void setName(String name) { this.name = name; } private String name; public Users(String name) { this.id = COUNTER.getAndIncrement(); this.name = name; } }