6.4   定义员工类，具有姓名、年龄、性别属性，并具有构造方法和显示数据方法。定义管理层类，继承员工类，并具有自己的属性：职务和年薪。定义职员类继承员工类，并有自己的属性：所属部门和月薪。

package book;

//Staff   员工类
public class Staff {
	private String name;
	private char sex;
	private int age;

	public Staff(String name, char sex, int age) {
		this.sex = sex;
		this.name = name;
		this.age = age;
	}

	public String print() {
		return "姓名" + this.getName() + "\t" + "年龄" + this.getAge() + "\t" + "性别" + this.getSex() + "\t";
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public char getSex() {
		return sex;
	}

	public void setSex(char sex) {
		this.sex = sex;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
}

// Management 管理层类
public class Management extends Staff {
	private String post;
	private int annSalary;

	public Management(String name, char sex, int age, String post, int annSalary) {
		super(name, sex, age);
		this.annSalary = annSalary;
		this.post = post;
	}

	public String print() {
		return super.print() + "职务" + this.getPost() + "\t" + "年薪" + this.getAnnSalary();
	}

	public String getPost() {
		return post;
	}

	public void setPost(String post) {
		this.post = post;
	}

	public int getAnnSalary() {
		return annSalary;
	}

	public void setAnnSalary(int annSalary) {
		this.annSalary = annSalary;
	}
}

// Worker 职员类
public class Worker extends Staff {
	private String department;
	private int monSalary;

	public Worker(String name, char sex, int age, String department, int monSalary) {
		super(name, sex, age);
		this.department = department;
		this.monSalary = monSalary;
	}

	public String print() {
		return super.print() + "姓名" + this.getDepartment() + "\t" + "年龄" + this.getMonSalary();
	}

	public String getDepartment() {
		return department;
	}

	public void setDepartment(String department) {
		this.department = department;
	}

	public int getMonSalary() {
		return monSalary;
	}

	public void setMonSalary(int monSalary) {
		this.monSalary = monSalary;
	}
}