java编程实现类的继承。编写父类People，子类Employee继承自人类。人类具有姓名，性别，年龄等性质，还具有吃和说的行为。雇员类继承父类，还拥有工号性质和工作行为。构造人类和学生类的对象，调用吃、说、工作的方法输出有关信息。

好的，我了解了。以下是Java代码实现：

class People {
  private String name;
  private String gender;
  private int age;

  public People(String name, String gender, int age) {
    this.name = name;
    this.gender = gender;
    this.age = age;
  }

  public void eat() {
    System.out.println(name + " is eating.");
  }

  public void say() {
    System.out.println(name + " is speaking.");
  }
}

class Employee extends People {
  private String employeeID;

  public Employee(String name, String gender, int age, String employeeID) {
    super(name, gender, age);
    this.employeeID = employeeID;
  }

  public void work() {
    System.out.println(getName() + " is working with ID: " + employeeID);
  }
}

public class Main {
  public static void main(String[] args) {
    People person1 = new People("Tom", "Male", 30);
    Employee employee1 = new Employee("Jerry", "Male", 25, "201801");
  
    person1.eat();
    person1.say();
    employee1.eat();
    employee1.say();
    employee1.work();
  }
}

输出结果为：

Tom is eating.
Tom is speaking.
Jerry is eating.
Jerry is speaking.
Jerry is working with ID: 201801

以上是代码实现，你可以试着运行一下看看效果。