定义一个有关人的Person类，内含属性： String name、int age、boolean gender、int id，所有的变量必须为私有(private)。

好的，这是一个关于Java编程的问题。下面是Person类的定义：

public class Person {
  private String name;
  private int age;
  private boolean gender;
  private int id;

  public Person(String name, int age, boolean gender, int id) {
    this.name = name;
    this.age = age;
    this.gender = gender;
    this.id = id;
  }

  //Getter and Setter methods for all private variables
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public boolean isGender() {
    return gender;
  }
  public void setGender(boolean gender) {
    this.gender = gender;
  }
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
}

希望可以帮到你。