Java
闆嗗悎妗嗘灦涔?/p>
Map
璇﹁В
Map
锛堟槧灏勶級鏄竴涓帴鍙ｏ紝鏄竴涓敭鍊煎鏉ヨ繘琛屽瓨鍌ㄧ殑銆備竴瀵逛竴瀵瑰線閲屽唴瀛橈紝鑰屼笖瑕佷繚璇侀敭
鐨勫敮涓�鎬с�?/p>
Map
|--Hashtable
锛氬簳灞傛槸鍝堝笇琛ㄦ暟鎹粨鏋勶紝涓嶅彲浠ュ瓨鍏?/p>
null
閿?/p>
null
鍊笺�傝闆嗗悎鏄嚎绋嬪悓姝?/p>
鐨勩�?/p>
jdk1.0
鏁堢巼浣?/p>
|--HashMap:
搴曞眰鏄搱甯岃〃鏁版嵁缁撴瀯锛屽厑璁镐娇鐢?/p>
null
鍊煎拰
null
閿紝璇ラ泦鍚堟槸涓嶅悓姝ョ殑銆?/p>
jdk1.2
鏁堢巼楂?/p>
|--TreeMap
锛?/p>
搴曞眰鏄�屾煡瀹炴暟鎹粨鏋勩�?/p>
绾跨▼涓嶅悓姝ャ�?/p>
鍙互鐢ㄤ簬缁?/p>
Map
闆嗗悎涓殑閿繘琛屾帓
搴忥紝鍜?/p>
Set
寰堝儚锛屽叾瀹烇紝
Set
搴曞眰灏辨槸浣跨敤浜?/p>
Map
闆嗗悎銆?/p>
Map
HashMap
鏄渶甯哥敤鐨勪竴涓被锛岄偅涔?/p>
HashMap
鐨勬渶甯哥敤鐨勬柟娉曟湁鍝簺鍛紵
a
锛?/p>
鏀剧疆锛?/p>
public
V
put
(
K
key, V value)
锛氬湪姝ゆ槧灏勪腑鍏宠仈鎸囧畾鍊间笌鎸囧畾閿?/p>
b
锛夎幏鍙栵細
public
V
get
(
Object
key)
锛氳繑鍥炴寚瀹氶敭鎵�鏄犲皠鐨勫�?/p>
閿殑闆嗗悎锛?/p>
public
Set
<
K
>
keySet
()
锛?/p>
Map
鐨?/p>
keySet
锛堬級鏂规硶浼氳繑鍥?/p>
key
鐨勯泦鍚堬紝鍥犱负
Map
鐨勯敭鏄笉鑳介噸澶嶇殑锛屽洜姝?/p>
ksySet
锛堬級鏂规硶鐨勮繑鍥炵被鍨嬫槸
set
銆?/p>
c
锛?/p>
鍊肩殑闆嗗悎锛?/p>
public Collection<V> values()
锛?/p>
Map
鐨勫�兼槸鍙互閲嶅鐨勩�傚洜姝?/p>
value
锛堬級鏂规硶鐨?
杩斿洖绫诲瀷鏄?/p>
Collection
锛屽彲浠ュ绾抽噸澶嶇殑鍏冪礌
.
鎴戜滑鏉ョ湅鐪嬩互涓嬶紝杩欎簺甯哥敤鏂规硶鐨勪娇鐢細
import
java.util.Collection;
import
java.util.HashMap;
import
java.util.Iterator;
import
java.util.Set;
public
class
HashMapTest {
public
static
void
main(String[] args) {
HashMap map=
new
HashMap();
map.put(
"name1"
,
"zhangsan"
);
map.put(
"name2"
,
"lisi"
);
map.put(
"name3"
,
"wangwu"
);
map.put(
"name1"
,
"zhaoliu"
);
System.
out
.println(map);
System.
out
.println(
"--------------------"
);
String value1=(String) map.get(
"name2"
);
System.
out
.println(value1);