HashMap鏄疛ava涓父鐢ㄧ殑鏁版嵁缁撴瀯涔嬩竴锛屽畠鏄竴涓棤搴忕殑閿€煎闆嗗悎锛屽彲浠ュ瓨鍌ㄤ笉鍚岀被鍨嬬殑閿拰鍊笺€備互涓嬫槸HashMap鐨勫熀鏈敤娉曪細

1. 瀵煎叆HashMap绫伙細鍦ㄩ渶瑕佷娇鐢℉ashMap鐨勭被涓紝棣栧厛闇€瑕佸鍏ashMap绫汇€?/li>

import java.util.HashMap;

2. 鍒涘缓HashMap瀵硅薄锛氫娇鐢?code>new鍏抽敭瀛楀拰HashMap鐨勬瀯閫犲嚱鏁帮紝鍒涘缓涓€涓狧ashMap瀵硅薄銆?/li>

HashMap<String, Integer> hashMap = new HashMap<>();

3. 娣诲姞閿€煎锛氫娇鐢?code>put()鏂规硶锛屽皢閿€煎娣诲姞鍒癏ashMap涓€?/li>

hashMap.put("key1", 1);
hashMap.put("key2", 2);

4. 鑾峰彇鍊硷細浣跨敤get()鏂规硶锛岄€氳繃閿幏鍙栧搴旂殑鍊笺€?/li>

int value = hashMap.get("key1");
System.out.println(value);  // 杈撳嚭锛?

5. 鍒ゆ柇閿槸鍚﹀瓨鍦細浣跨敤containsKey()鏂规硶锛屽垽鏂璈ashMap涓槸鍚﹀寘鍚寚瀹氱殑閿€?/li>

boolean exists = hashMap.containsKey("key1");
System.out.println(exists);  // 杈撳嚭锛歵rue

6. 閬嶅巻HashMap锛氬彲浠ヤ娇鐢ㄤ笉鍚岀殑鏂瑰紡閬嶅巻HashMap涓殑閿拰鍊笺€?/li>

• 閬嶅巻閿泦鍚堬細浣跨敤keySet()鏂规硶鑾峰彇HashMap涓殑閿泦鍚堬紝鐒跺悗浣跨敤for-each寰幆閬嶅巻閿泦鍚堛€?/li>

for (String key : hashMap.keySet()) {
System.out.println(key);
}

• 閬嶅巻鍊奸泦鍚堬細浣跨敤values()鏂规硶鑾峰彇HashMap涓殑鍊奸泦鍚堬紝鐒跺悗浣跨敤for-each寰幆閬嶅巻鍊奸泦鍚堛€?/li>

for (int value : hashMap.values()) {
System.out.println(value);
}

• 閬嶅巻閿€煎锛氫娇鐢?code>entrySet()鏂规硶鑾峰彇HashMap涓殑閿€煎闆嗗悎锛岀劧鍚庝娇鐢?code>for-each寰幆閬嶅巻閿€煎闆嗗悎銆?/li>

for (Map.Entry<String, Integer> entry : hashMap.entrySet()) {
String key = entry.getKey();
int value = entry.getValue();
System.out.println(key + ": " + value);
}

浠ヤ笂鏄疕ashMap鐨勫熀鏈敤娉曪紝杩樺彲浠ヤ娇鐢ㄥ叾浠栨柟娉曞HashMap杩涜鎿嶄綔锛屼緥濡傚垹闄ら敭鍊煎銆佽幏鍙栧ぇ灏忕瓑銆?/p>