java第7次作业

interface Pet{
        public String getName() ;
    public String getColor() ;
    public int getAge() ;
}
class Cat implements Pet{
    private String name ;
    private String color ;
    private int age ;
    public Cat(String name,String color,int age){
        this.setName(name) ;
        this.setColor(color) ;
        this.setAge(age) ;
    }
    public void setName(String name){
        this.name = name ;
    }
    public void setColor(String color){
        this.color = color;
    }
    public void setAge(int age){
        this.age = age ;
    }
    public String getName(){
        return this.name ;
    }
    public String getColor(){
        return this.color ;
    }
    public int getAge(){
        return this.age ;
    }
};
class Dog implements Pet{
    private String name ;
    private String color ;
    private int age ;
    public Dog(String name,String color,int age){
        this.setName(name) ;
        this.setColor(color) ;
        this.setAge(age) ;
    }
    public void setName(String name){
        this.name = name ;
    }
    public void setColor(String color){
        this.color = color;
    }
    public void setAge(int age){
        this.age = age ;
    }
    public String getName(){
        return this.name ;
    }
    public String getColor(){
        return this.color ;
    }
    public int getAge(){
        return this.age ;
    }
};
class PetShop{
    private Pet[] pets ;
    private int foot ;
    public PetShop(int len){
        if(len>0){
            this.pets = new Pet[len] ;
        }else{
            this.pets = new Pet[1] ;
        }
    }
    public boolean add(Pet pet){
        if(this.foot<this.pets.length){
            this.pets[this.foot] = pet ;
            this.foot ++ ;
            return true ;
        }else{
            return false ;
        }
    }
    public Pet[] search(String keyWord){
        Pet p[] = null ;
        int count = 0 ;
        for(int i=0;i<this.pets.length;i++){
            if(this.pets[i]!=null){
                if(this.pets[i].getName().indexOf(keyWord)!=-1
                    ||this.pets[i].getColor().indexOf(keyWord)!=-1){
                    count++ ;
                }
            }
        }
        p = new Pet[count] ;
        int f = 0 ;
        for(int i=0;i<this.pets.length;i++){
            if(this.pets[i]!=null){
                if(this.pets[i].getName().indexOf(keyWord)!=-1
                    ||this.pets[i].getColor().indexOf(keyWord)!=-1){
                    p[f] = this.pets[i] ;
                    f++ ;
                }
            }
        }
        return p ;

    }
};
public class HomeworkDemo{
    public static void main(String args[]){
        PetShop ps = new PetShop(5) ;
        ps.add(new Cat("英短","灰色的",3)) ;
        ps.add(new Cat("布偶猫","白色的",2)) ;
        ps.add(new Cat("花猫","花色的",4)) ;
        ps.add(new Dog("哈士奇","黑白色的",5)) ;
        ps.add(new Dog("金毛","金色的",6)) ;
        ps.add(new Dog("黑贝","棕色的",3)) ;
        print(ps.search("白")) ;
    }
    public static void print(Pet p[]){
        for(int i=0;i<p.length;i++){
            if(p[i]!=null){
                System.out.println(p[i].getName() + "，" + p[i].getColor()
                    +"，" + p[i].getAge()) ;
            }
        }
    }
};