package lianxi;
/*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 ja {
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 lianxi;
public class Cbwf extends ja {
double width;
double height;
public Cbwf() {
}
public Cbwf(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 lianxi;
/*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 ja {
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 lianxi;
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 lianxi;
/*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 ja {
String name;
int month;
public Jhd() {
}
public Jhd(String name, int month) {
super();
this.name = name;
this.month = month;
}
public double getSalary(int month) {
return 0;
}
}
package lianxi;
public class Hgc extends ja {
double salary;
public Hgc() {
super();
}
public Hgc(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 lianxi;
/*(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 Ntd extends ja {
private int hourlysalary;
private int hourlytime;
public Ntd() {
super();
}
public Ntd(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 lianxi;
/*(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 Kbf extends ja {
private int monthSales;// 月销售额
private double royaltyRate;// 提成率
public Kbf(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 lianxi;
/*(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 ja {
public void getSalary(Jhd c,int month) {
System.out.println(c.name + "在" + month + "月的月薪为" + c.getSalary(month)+"元");
}
}
package lianxi;
/*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 ja {
public static void main(String[] args) {
// TODO Auto-generated method stub
Jhd[] all = {
new Hgc("田某", 5, 9000),//name,month,月薪
new Ntd("马某", 5, 10, 30),//name,month,时薪,小时数
new Kbf("田某某", 3, 50000, 0.3)//name,month,月销售额,提成率
};
for (int i = 0; i < all.length; i++) {
new Bja().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();
}}