HashMap的四種周遊

啦啦啦！我又來了！這一周長安瘋狂下雨，我人傻了，拿傘的時候不下，沒有帶傘就暴雨。

話說天氣預報這準确率，真就一直五五開呗，害！！

周遊hashmap

package HW;

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

public class bianli {

	public static void T1(Map<Integer, String> map) {
		// keyset疊代器
		Set<Integer> keys = map.keySet();
		Iterator<Integer> its = keys.iterator();
		while (its.hasNext()) {
			Integer k = its.next();
			String v = map.get(k);
			System.out.println(k + "====" + v);
		}
	}

	public static void T2(Map<Integer, String> map) {
		// keyset的增強for
		Set<Integer> keys1 = map.keySet();
		for (Integer key : keys1) {
			String value = map.get(key);
			System.out.println(key + ">====>" + value);
		}
	}

	public static void T3(Map<Integer, String> map) {
		// Entry的疊代器
		Set<Entry<Integer, String>> entrys = map.entrySet();
		Iterator<Entry<Integer, String>> it = entrys.iterator();
		while (it.hasNext()) {
			Entry entry = it.next();
			System.out.println(entry.getKey() + "----" + entry.getValue());
		}
	}

	public static void T4(Map<Integer, String> map) {
		// Entry的增強for
		Set<Entry<Integer, String>> entrys = map.entrySet();
		for (Entry<Integer, String> entry : entrys) {
			System.out.println(entry.getKey() + ">---->" + entry.getValue());
		}

	}

	public static void main(String[] args) {
		Map<Integer, String> map = new HashMap<Integer, String>();
		map.put(1, "bdd");
		map.put(2, "faker");
		map.put(3, "clid");
		map.put(4, "ruler");
		T1(map);
		T2(map);
		T3(map);
		T4(map);	
	}	
}
           

結果展示：

溜了