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+" "+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 + " " + sex); } System.out.println("使用foreach遍历 "); for (String name : nameset) { String sex = map.get(name); System.out.println(name + " " + sex); } } }