/**
继承的应用示例
实现一个化妆品商城中的化妆品管理
1、定义一个化妆品类( Cosmetic)
2、定义一个化妆品管理类(CosmeticManager)
(1)实现进货功能
(2)可以输出所有化妆品信息功能
3、使用继承实现一个可按单价排序输出所有化妆品的功能
4、使用继承实现一个只输出进口化妆品的功能
*/
public class Test2 {
public static void main(String[]args){
ImportCosmeticManager cm = new ImportCosmeticManager();
cm.add(new Cosmetic("香奈儿","进口",1500));
cm.add(new Cosmetic("圣罗兰","进口",1300));
cm.add(new Cosmetic("娇韵诗","进口",1200));
cm.add(new Cosmetic("兰蔻","进口",1000));
cm.printInfo();
}
}
//可输出进口化妆品的管理类
class ImportCosmeticManager extends CosmeticManager{
public void printInfo(){
//比较两个字符串的值是否相等,不能使用==,使用equals()
for(int i=0;i<count;i++){
if("进口".equals(cs[i].getType())){
System.out.println(cs[i].getInfo());
}
}
}
}
//可按单价排序的化妆品管理类
class SortCosmeticManager extends CosmeticManager{
//排序输出所有产品
public void printInfo(){
Cosmetic[] temp = java.util.Arrays.copyOf(cs,count);
System.out.println(temp.length);
Cosmetic c = null;
for(int i=0;i<temp.length-1;i++){
for(int j=0;j<temp.length-i-1;j++){
if(temp[j].getPrice()>temp[j+1].getPrice()){
c=temp[j];
temp[j]=temp[j+1];
temp[j+1]=c;
}
}
}
for(Cosmetic cosmetic: temp){
System.out.println(cosmetic.getInfo());
}
}
}
//化妆品管理类
class CosmeticManager{
protected Cosmetic[] cs = new Cosmetic[4];
protected int count =0;
//进货功能
public void add(Cosmetic c){
int size = cs.length;
if(count>=size){
int newLen = size*2;
cs = java.util.Arrays.copyOf(cs,newLen);
}
cs[count] = c;
count++;
}
//输出所有产品
public void printInfo(){
for(int i=0;i<count;i++){
System.out.println(cs[i].getInfo());
}
}
}
class Cosmetic{
private String name;//品牌
private String type;//进口或国产
private int price;//单价
public Cosmetic(){}
public Cosmetic(String name,String type,int price){
this.name = name;
this.type = type;
this.price = price;
}
public void setName(String name){
this.name = name;
}
public String getName(){
return name;
}
public void setType(String type){
this.type = type;
}
public String getType(){
return type;
}
public void setPrice(int price){
this.price = price;
}
public int getPrice(){
return price;
}
public String getInfo(){
return "name="+name+",type="+type+",price="+price;
}
}
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