package lianxi1;
/*2、设计四个类，分别是：（知识点：抽象类及抽象方法）
（1）Shape表示图形类，有面积属性area、周长属性per，颜色属性color，有两个构造方法（一个是默认的、一个是为颜色赋值的），还有3个抽象方法，分别是：getArea计算面积、getPer计算周长、showAll输出所有信息，还有一个求颜色的方法getColor。
*/
public abstract class Shape {
protected double area;
protected double per;
protected String color;
public Shape() {
}
public Shape(String color) {
this.color = color;
}
public abstract void getArea();
public abstract void getPer();
public abstract void showAll();
}
package lianxi1;
/*（2）2个子类：
1）Rectangle表示矩形类，增加两个属性，Width表示长度、height表示宽度，重写getPer、getArea和showAll三个方法，另外又增加一个构造方法（一个是默认的、一个是为高度、宽度、颜色赋值的）。
*/
public class Rectangle extends Shape{
double width;
double height;
public Rectangle() {
}
public Rectangle(String color, double width, double height) {
super(color);
this.width = width;
this.height = height;
this.color=color;
}
public void getPer() {
per = (width+height)*2;
}
public void getArea() {
area =(width*height);
}
public void showAll() {
System.out.println("矩形面积为：" + area + "，周长为：" + per + ",颜色：" + color);
}
}
package lianxi1;
/*2）Circle表示圆类，增加1个属性，radius表示半径，重写getPer、getArea和showAll三个方法，另外又增加两个构造方法（为半径、颜色赋值的）。*/
public class Circle extends Shape{
int radius;
public Circle(int radius,String color) {
super(color);
this.radius = radius;
this.color=color;
}
public void getPer() {
per = radius*2*3.14;
}
public void getArea() {
area =radius*radius*3.14;
}
public void showAll() {
System.out.println("圆形面积为：" + area + "，周长为：" + per + ",颜色：" + color);
}
}
package lianxi1;
/*（3）一个测试类PolyDemo，在main方法中，声明创建每个子类的对象，并调用2个子类的showAll方法。*/
public class Polydamo {
public static void main(String[] args) {
Shape r1= new Rectangle("蓝色",5.0,6.0);
Shape c1 = new Circle(5,"白色");
r1.getArea();
r1.getPer();
c1.getArea();
c1.getPer();
r1.showAll();
c1.showAll();
}
}
package cola;
/*Cola公司的雇员分为以下若干类：(知识点：多态)
(1) ColaEmployee ：这是所有员工总的父类，属性：员工的姓名,员工的生日月份。
方法：getSalary(int month) 根据参数月份来确定工资，如果该月员工过生日，则公司会额外奖励100 元。*/
public class colaEmployee {
String name;
int month;
public colaEmployee() {
}
public colaEmployee(String name, int month) {
super();
this.name = name;
this.month = month;
}
public double getSalary(int month) {
return 0;
}
}
package cola;
/*(3) HourlyEmployee ：ColaEmployee 的子类，按小时拿工资的员工，每月工作超出160 小时的部分按照1.5 倍工资发放
* 属性：每小时的工资、每月工作的小时数。*/
public class hourlyEmployee extends colaEmployee {
private int hourlysalary;
private int hourlytime;
public hourlyEmployee() {
super();
}
public hourlyEmployee(String name, int month,int hourlytime,int hourlysalary) {
super(name, month);
this.hourlytime=hourlytime;
this.hourlysalary=hourlysalary;
}
public double getHourlysalary(int month) {
if (super.month == month) {
if (hourlytime > 160) {
return hourlysalary * 160 + hourlysalary * (hourlytime - 160) * 1.5 + 100;
} else {
return hourlysalary * hourlytime + 100;
}
} else {
if (hourlytime > 160) {
return hourlysalary * 160 + hourlysalary * (hourlytime - 160) * 1.5;
} else {
return hourlysalary * hourlytime;
}
}
}
}
package cola;
/*(2) SalariedEmployee ： ColaEmployee 的子类，拿固定工资的员工。
属性：月薪*/
public class salariedEmployee extends colaEmployee{
double salary;
public salariedEmployee() {
super();
}
public salariedEmployee(String name, int month,int salary) {
super(name,month);
this.salary = salary;
}
public double getSalary(int month) {
if (super.month == month) {
return salary + 100;
}else {
return salary;
}
}
}
package cola;
/*(4) SalesEmployee ：ColaEmployee 的子类，销售人员，工资由月销售额和提成率决定。
* 属性：月销售额、提成率*/
public class salesEmployee extends colaEmployee {
private int monthSales;// 月销售额
private double royaltyRate;// 提成率
public salesEmployee(String name, int month, int monthSales, double royaltyRate) {
super(name, month);
this.monthSales = monthSales;
this.royaltyRate = royaltyRate;
}
public double getSalary(int month) {
if (super.month == month) {
return monthSales * royaltyRate + 100;
} else {
return monthSales * royaltyRate;
}
}
}
package cola;
/*(5) 定义一个类Company，在该类中写一个方法，调用该方法可以打印出某月某个员工的工资数额*/
public class company {
public void getSalary(colaEmployee c,int month) {
System.out.println(c.name + "在" + month + "月的月薪为" + c.getSalary(month)+"元");
}
}
package cola;
/*写一个测试类TestCompany,在main方法，把若干各种类型的员工放在一个ColaEmployee 数组里，并单元出数组中每个员工当月的工资*/
public class testCompany {
public static void main(String[] args) {
// TODO Auto-generated method stub
colaEmployee[] all = {
new salariedEmployee("张三", 5, 9000),//name,month,月薪
new hourlyEmployee("李四", 5, 10, 30),//name,month,时薪,小时数
new salesEmployee("王五", 3, 50000, 0.3)//name,month,月销售额，提成率
};
for (int i = 0; i < all.length; i++) {
new company().getSalary(all[i],5);
}
}
}
package fruit;
public interface fruit {//提供接口
}
package fruit;
public class apple implements fruit{
public apple(){
System.out.println("创建了一个苹果");
}
}
package fruit;
public class banana implements fruit{
public banana(){
System.out.println("创建了一个香蕉");
}
}
package fruit;
import java.util.Scanner;
public class gardener {
public fruit create() {
System.out.println("输入：");
Scanner input = new Scanner(System.in);
String name = input.next();
fruit fruit = null;
switch(name){
case "苹果":
fruit = new apple();
break;
case "葡萄":
fruit = new grape();
break;
case "香蕉":
fruit = new banana();
break;
}
input.close();
return fruit;
}
}
package fruit;
public class grape implements fruit{
public grape(){
System.out.println("创建了一个葡萄");
}
}
package fruit;
public class fruittest {
public static void main(String[] args) {
gardener g = new gardener();
g.create();
}}
