java6.12

1.使用HashMap存储多个企鹅信息，然后统一使用Iterator进行遍历

package pro1;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class Test {
    public static void main(String[] args) {
        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 pro2;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class Test {
    public static void main(String[] args) {
        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);
        }
    }
}