改个小错,该怎么处理_J2SE

改个小错

Java code

package holding;import static net.mindview.util.Print.print;import java.util.HashMap;import typeinfo.pets.Person;import typeinfo.pets.Pet;public class KeepCount extends HashMap{    static KeepCount kc=new KeepCount();    public void add()    {        this.put("good","99.9" );        this.put("bad","10" );        this.put("soso","70" );        this.put("good","90" );        this.put("good","86" );        this.put("bad","50" );        this.put("soso","60" );        this.put("soso","84" );        this.put("good","99" );        this.put("bad","40" );        this.put("bad","56" );        this.put("soso","71" );        this.put("good","87" );        this.put("bad","51" );        this.put("soso","65" );        this.put("good","100" );    }    public static void main(String[] args)    {        kc.add();        System.out.println(kc);        for(Object person : kc.keySet()) {              print(person);              for(Object pet : kc.get(person))  //这行错了，说什么不能迭代什么的                print("    " + pet);            }            }}

------解决方案--------------------
for(Object person : kc.keySet()) {//kc.keySet()对kc这个map的key组成的list进行迭代
print(person);//person是其中的一个key
for(Object pet : kc.get(person)) //kc.get(person)是kc中key为person所对应的map值，他就是一个value，所以不能迭代
print(" " + pet);
}