作业15

1.使用HashMap存储多个企鹅信息，然后统一使用Iterator进行遍历
package ZASD;
import java.util.HashMap;
import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
public class ZXCVB {
    public static void main(String[] args) {
            // TODO Auto-generated method stub
             Map<String, String> map = new HashMap();
             map.put("yaya", "Q妹");
             map.put("feifei", "Q妹");
             map.put("ouou", "Q仔");        
             map.put("meimei", "Q妹");    
             System.out.println("分别是:");
             Set<String> nameset = map.keySet();
             Iterator<String> iter = nameset.iterator();
         while (iter.hasNext())
         
    {
                 String name = iter.next();
                 String sex = map.get(name);
             System.out.println(name+"\t"+sex);
             }
         
         }
     
 }

2.为企鹅添加一个编号，并作为键存储多个企鹅信息到应用泛型的HashMap集合 使用Iterator、foreach语句进行遍历

package ZASD;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

 public class ZXCVBZ { 
     public static void main(String[] args) {
         // TODO Auto-generated method stub
         Map<String, String> map = new HashMap();
         map.put("yaya", "Q妹");
         map.put("feifei", "Q妹");
         map.put("ouou", "Q仔");
         map.put("meimei", "Q妹");
         System.out.println("分别是:");
         System.out.println("使用iterator遍历  ");
         Set<String> nameset = map.keySet();
         Iterator<String> iter = nameset.iterator();
         while (iter.hasNext()) {
             String name = iter.next();
             String sex = map.get(name);
             System.out.println(name + "\t" + sex);
         }
 
         System.out.println("使用foreach遍历  ");
         for (String name : nameset) {
             String sex = map.get(name);
             System.out.println(name + "\t" + sex);
         }
     }
 
 }