public interface ClassName {
public String getClassName();
}
public class Company implements ClassName {
private String className;
public Company() {
}
public Company(String className) {
this.className = className;
}
public String getClassName() {
return this.className;
}
public static void main(String[] args) {
ClassName cn = new Company("Company类");
System.out.println(cn.getClassName());
}
}
//结果:Company类
public abstract class Shape {// 图形类
public abstract float area();
}
public class Triangle extends Shape {// 三角形的类
private float length;
private float wide;
public Triangle() {
}
public Triangle(float length, float wide) {
super();
this.length = length;
this.wide = wide;
}
public float getLength() {
return this.length;
}
public void setLength(float length) {
this.length = length;
}
public float getWide() {
return this.wide;
}
public void setWide(float wide) {
this.wide = wide;
}
public float area() {
return this.length * wide / 2;
}
public static void main(String[] args) {
Shape s1 = new Triangle(20.0f, 30.f);
System.out.println(s1.area());
}
}
//结果:300.0
public abstract class Person {
private String name;
private String addr;
private char sex;
private int age;
public Person() {
}
public Person(String name, String addr) {
super();
this.name = name;
this.addr = addr;
}
public Person(String name, String addr, char sex, int age) {
super();
this.name = name;
this.addr = addr;
this.sex = sex;
this.age = age;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public String getAddr() {
return this.addr;
}
public void setAddr(String addr) {
this.addr = addr;
}
public char getSex() {
return this.sex;
}
public void setSex(char sex) {
this.sex = sex;
}
public int getAge() {
return this.age;
}
public void setAge(int age) {
if (age > 0 && age < 150) {
this.age = age;
}
}
public abstract String getInfo();// 获取4种属性
}
public class Student extends Person {
private float math;
private float english;
public Student() {
}
public Student(String name, String addr) {
super(name, addr);
}
public Student(String name, String addr, char sex, int age, float math, float english) {
super(name, addr, sex, age);
this.english = english;
this.math = math;
}
public float getMath() {
return this.math;
}
public void setMath(float math) {
this.math = math;
}
public float getEnglish() {
return this.english;
}
public void setEnglish(float english) {
this.english = english;
}
public String getInfo() {
return "学生名字" + super.getName() + ",学生地址:" + super.getAddr() + ",学生性别:" + super.getSex() + ",学生年龄"
+ super.getSex() + ",数学成绩:" + this.math + ",英语成绩:" + this.english;
}
public static void main(String[] args) {
Person per = new Student("小白", "潮阳", '男', 18, 99.0f, 100.0f);
System.out.println(per.getInfo());
}
}
public abstract class Staff {//员工类
private String name;
private int age;
private char sex;
public Staff() {}
public Staff(String name,int age,char sex) {
super();
this.name=name;
this.age=age;
this.sex=sex;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return this.age;
}
public void setAge(int age) {
if(age>0&&age<150) {
this.age = age;
}
}
public char getSex() {
return this. sex;
}
public void setSex(char sex) {
this.sex = sex;
}
public abstract String getInfo();
}
public class Boss extends Staff {//管理层类
private String duty;
private float yearmoney;
public Boss() {}
public Boss(String name,int age,char sex,String duty,float yearmoney) {
super(name,age,sex);
this.duty=duty;
this.yearmoney=yearmoney;
}
public String getDuty() {
return this. duty;
}
public void setDuty(String duty) {
this.duty = duty;
}
public float getYearmoney() {
return this.yearmoney;
}
public void setYearmoney(float yearmoney) {
this.yearmoney = yearmoney;
}
public String getInfo() {
return "姓名:"+super.getName()+",年龄:"+super.getAge()+
"性别:"+super.getSex()+",职务:"+this.duty+",年薪:"+this.yearmoney;
}
}
public class OfficeClerk extends Staff {//职员类
private String duty;
private float mothmoney;
public OfficeClerk() {
super();
}
public OfficeClerk(String name,int age,char sex,String duty, float mothmoney) {
super(name,age,sex);
this.duty = duty;
this.mothmoney = mothmoney;
}
public String getDuty() {
return this.duty;
}
public void setDuty(String duty) {
this.duty = duty;
}
public float getMothmoney() {
return this. mothmoney;
}
public void setMothmoney(float mothmoney) {
this.mothmoney = mothmoney;
}
public String getInfo() {
return "姓名:"+super.getName()+",年龄:"+super.getAge()+
"性别:"+super.getSex()+",职务:"+this.duty+",年薪:"+this.mothmoney;
}
}
public class Test4 {
public static void main(String[] args) {
Staff s1=new Boss("张三",30,'男',"经理",100.0f);
Staff s2=new OfficeClerk("李四",30,'男',"保安",10.0f);
System.out.println(s1.getInfo());
System.out.println(s2.getInfo());
}
}
//结果:姓名:张三,年龄:30性别:男,职务:经理,年薪:100.0
姓名:李四,年龄:30性别:男,职务:保安,年薪:10.0
public interface Goods {//商品
public float getPrice();
public String getName();
}
public class ShopCar {//购物车
private Goods goods[];//保存商品
private int foot;
public ShopCar(int length) {
if(length>0) {
this.goods=new Goods[length];
}else {
this.goods=new Goods[1];//至少有一件商品
}
}
public void add(Goods goods) {//添加商品
if(this.foot