用java编辑：定义一个表示员工信息的类Employee，Employee类中包含表示姓名、工资、部门的私有成员变量，定义Employee的构造方法实现对表示姓名、工资这两个私有成员变量的初始化后，然后重载Employee的构造方法实现对表示姓名、工资、部门这三个个私有成员变量的初始化后，并根据员工对象创建时所调用构造方法的不同，输出相应的员工信息。例如创建姓名为” WangYi”，工资为8000的员工对象，创建姓名为” WangEr”，工资为7000，部门为"coffe shop"的员工对象，程序的输出信息为： WangYi's salary is 8000. WangEr is work in coffe shop, his salary is 7000. 输出内容如下： WangYi's salary is 8000. WangEr is work in coffe shop, his salary is 7000.

代码如下：

public class Employee {
    private String name;
    private double salary;
    private String department;
    
    // 构造方法，初始化姓名和工资
    public Employee(String name, double salary) {
        this.name = name;
        this.salary = salary;
    }
    
    // 重载构造方法，初始化姓名、工资和部门
    public Employee(String name, double salary, String department) {
        this.name = name;
        this.salary = salary;
        this.department = department;
    }
    
    // 输出员工信息
    public void printEmployeeInfo() {
        if (department == null) {
            System.out.println(name + "'s salary is " + salary + ".");
        } else {
            System.out.println(name + " is work in " + department + ", his salary is " + salary + ".");
        }
    }
}

主函数中可以这样调用：

public static void main(String[] args) {
    Employee employee1 = new Employee("WangYi", 8000);
    Employee employee2 = new Employee("WangEr", 7000, "coffe shop");
    employee1.printEmployeeInfo();
    employee2.printEmployeeInfo();
}

输出结果为：

WangYi's salary is 8000.  
WangEr is work in coffe shop, his salary is 7000.