java第十五周课后作业06/12

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

 

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集合中，使用Iterator和foreach进行遍历

package homework;

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

public class Test08 {

	public static void main(String[] args) {
		Map<String, String> map = new HashMap<String, String>();
		map.put("丫丫", "Q妹");
		map.put("当当", "Q仔");
		map.put("菲菲", "Q妹");
		map.put("欧欧", "Q妹");
		Set<String> keys = map.keySet();
		Iterator it = keys.iterator();
		System.out.println("===============================");
		while (it.hasNext()) {
			String key = (String) it.next();
			System.out.println("\t" + key + ":\t" + map.get(key));
		}
		System.out.println("===============================");

		HashMap<Integer, String> map1 = new HashMap<Integer, String>();
		map1.put(1, "哈哈Q仔");
		map1.put(2, "练练Q仔");
		map1.put(3, "皮皮Q仔");
		map1.put(4, "啦啦Q妹");
		Set<Integer> keys1 = map1.keySet();
		Iterator<Integer> it1 = keys1.iterator();
		System.out.println("使用Iterate 进行遍历");
		while (it1.hasNext()) {
			Integer key1 = it1.next();
			System.out.println("\t" + key1 + ":\t" + map1.get(key1));
		}
		System.out.println();
		System.out.println("使用foreach进行遍历");
		for (Integer integer : keys1) {
			System.out.println("\t" + integer + ":\t" + map1.get(integer));
		}

	}

}