java繼承的練習

package cosmetic;

public class Test {
	public static void main(String[] args) {
		ImportCosmeticManager cm = new ImportCosmeticManager();
		cm.add(new Cosmetic("香奈兒","進口",1000));
		cm.add(new Cosmetic("聖羅蘭","進口",800));
		cm.add(new Cosmetic("大寶","國產",20));
		cm.add(new Cosmetic("萬紫千紅","國產",15));
		
		cm.printInfo();
	}
}
//只輸出進口化妝品
class ImportCosmeticManager extends CosmeticManager{
	public void printInfo() {
		//字符串是否相等用 == 表示地址是否相同  equals表示值是否相等
		for(int i=0; i<count; i++) {
			if("進口".equals(cs[i].getType())) {
				System.out.println(cs[i].getInfo());
			}
		}
	}
}

//可按單價排序的化妝品管理類
class SortCosmeticManager extends CosmeticManager{
	//排序輸出所有產品
	public void printInfo() {
		Cosmetic[] temp = java.util.Arrays.copyOf(cs, count);
		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());
		}
	}
}

//化妝品管理類
class CosmeticManager{
	protected Cosmetic[] cs = new Cosmetic[4];
	protected int count = 0;
	
	//進貨功能
	public void add(Cosmetic c) {
		int size = cs.length;
		while(count >= size) {
			int newLen = size*2;
			cs = java.util.Arrays.copyOf(cs, newLen);
		}
		cs[count] = c;
		count++;
	}
	
	//輸出所有產品
	public void printInfo() {
		for(int i=0; i<count; i++) {
			System.out.println(cs[i].getInfo());
		}
	}
}

//化妝品類
class Cosmetic{
	private String name;  //品牌
	private String type;  //進口或國產
	private int price;  //單價
	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;
	}
}