1.
设计三个类，分别如下：（知识点：抽象类及抽象方法） [必做题]
• 3.1 设计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。
• 3.2 设计 2个子类：
• 3.2.1 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）。
• 3.2.2 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）。
• 3.3 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。
package wang;
public abstract class Shape {
double area;
double per;
char color;
public Shape() {
super();
}
public Shape(char color) {
super();
this.color = color;
}
public abstract double getPer();
public abstract double getArea();
public abstract void showAll();
public char getColor() {
return color;
}
}package www;
public class Rectangle extends Shape {
@Override
public double getPer() {
// TODO Auto-generated method stub
return (width + height) * 2;
}
@Override
public double getArea() {
// TODO Auto-generated method stub
return width * height;
}
double width;
double height;
public Rectangle(double width, double height, char color) {
super();
this.width = width;
this.height = height;
this.color = color;
}
public Rectangle() {
super();
}
public void showAll() {
System.out.println("矩形的长是" + width + ",宽是" + height + ",颜色是" + color + ",周长是" + getPer() + ",面积是" + getArea());
}
}
package wang;
public class Circle extends Shape{
double radius;
public void showAll(){
System.out.println("圆形的半径是"+radius+",颜色是"+color+",周长是"+getPer()+",面积是"+getArea());
}
@Override
public double getPer() {
// TODO Auto-generated method stub
return 2*3.14*radius;
}
@Override
public double getArea() {
// TODO Auto-generated method stub
return 3.14*radius*radius;
}
public Circle(double radius,char color) {
super();
this.radius = radius;
this.color=color;
}
}package wang;
public class testshape {
public static void main(String[] args) {
// TODO 自动生成的方法存根
Rectangle r = new Rectangle(2, 3, '黑');
r.showAll();
Circle c = new Circle(4, '红');
c.showAll();
}
}
4
package wang;
public class ColaEmployee {
protected String name;
protected int month;
public ColaEmployee() {
super();
}
public ColaEmployee(String name,int month) {
super();
this.name = name;
this.month = month;
}
public double getSalary(int month) {
return 0;
}
}
package wang;
public class Company extends ColaEmployee {
public void getSalary(ColaEmployee c,int month) {
System.out.println(c.name+"在"+month+"月的月薪为");
}
}
package wang;
public class HourlyEmployee extends ColaEmployee {
protected int hourmoney;
protected int daymonth;
public HourlyEmployee() {
super();
}
public HourlyEmployee(String name,int month, int hourmoney, int daymonth) {
super(name, month);
this.hourmoney=hourmoney;
this.daymonth=daymonth;
}
public double getSalary(int month) {
if(super.month==month) {
if(daymonth>160) {
return hourmoney * 160+hourmoney * (daymonth-160) * 1.5
+100;
}else {
return hourmoney * daymonth +100;
}
}else {
if(daymonth>160) {
return hourmoney * 160 + hourmoney * (daymonth-160) *1.5;
}else {
return hourmoney * daymonth;
}
}
}
}
public class SalariedEmployee extends ColaEmployee {
protected double money;
public SalariedEmployee() {
super();
}
public SalariedEmployee(String name, int month, double money) {
super(name, month);
this.money = money;
}
public double getSalary(int month) {
if (super.month == month) {
return money + 100;
} else {
return money;
}
}
}
public class SalesEmployee extends ColaEmployee {
protected int monthsales;
protected double rate;
public SalesEmployee() {
super();
}
public SalesEmployee(String name, int month, int monthsales, double rate) {
super(name, month);
this.monthsales = monthsales;
this.rate = rate;
}
public double getSalary(int month) {
if (super.month == month) {
return monthsales * rate + 100;
} else {
return monthsales * rate;
}
}
}
public class Testcompany {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
ColaEmployee c1[] = {
new SalariedEmployee("小李",5,12000),
new HourlyEmployee("小红",7,16,190),
new SalesEmployee("小f",7,19999,6) };
for (int i = 0; i < c1.length; i++) {
new Company().getSalary(c1[i], 2);
}
}
}
