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SVN瑙嗛鏁欑▼(缁撳悎eclipse,idea)鍏嶈垂棰嗗彇

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鍒嗕韩鍒帮細
鏃堕棿:2020-05-21 15:53鏉ユ簮:http://vitrailad.com 浣滆€?灏忛攱  渚垫潈涓炬姤
Java 鍏ㄥ闈㈣瘯棰?PDF 涓嬭浇
澶辨晥閾炬帴澶勭悊
Java 鍏ㄥ闈㈣瘯棰?PDF 涓嬭浇

 
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Java 鏈€甯歌 闈㈣瘯棰樺叏瑙f瀽锛氶潰璇曞繀澶?/div>
 
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鎴栬杩欎唤闈㈣瘯棰樿繕涓嶈冻浠ュ泭鎷墍鏈?Java 闂锛屼絾鏈変簡瀹冿紝鎴戠浉淇′綘涓€瀹氫笉浼?ldquo;璐?rdquo;鐨勫緢鎯紝鍥犱负鏈変簡瀹冿紝瓒充互搴斿鐩墠甯傞潰涓婄粷澶ч儴鍒嗙殑 Java 闈㈣瘯浜嗭紝鍥犱负杩欑瘒鏂囩珷涓嶈鏄粠娣卞害杩樻槸骞垮害涓婃潵璁诧紝閮藉凡缁忓泭鎷簡闈炲父澶氱殑鐭ヨ瘑鐐逛簡銆?/div>
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閫傚疁闃呰浜虹兢
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飩锋兂瑕佷笉鏂畬鍠勫拰鎵╁厖鑷繁 Java 鎶€鏈爤鐨勪汉
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闃呰寤鸿
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鍖呭惈鐨勬ā鍧?/div>
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Java 鍩虹
1. JDK 鍜?JRE 鏈変粈涔堝尯鍒紵
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飩稪RE锛欽ava Runtime Environment 鐨勭畝绉帮紝Java 杩愯鐜锛屼负 Java 鐨勮繍琛屾彁渚涗簡鎵€闇€鐜銆?/div>
鍏蜂綋鏉ヨ JDK 鍏跺疄鍖呭惈浜?JRE锛屽悓鏃惰繕鍖呭惈浜嗙紪璇?Java 婧愮爜鐨勭紪璇戝櫒 Javac锛岃繕鍖呭惈浜嗗緢澶?Java 绋嬪簭璋冭瘯鍜屽垎鏋愮殑宸ュ叿銆傜畝鍗曟潵璇达細濡傛灉浣犻渶瑕佽繍琛?Java 绋嬪簭锛屽彧闇€瀹夎 JRE 灏卞彲浠ヤ簡锛屽鏋滀綘闇€瑕佺紪鍐?Java 绋嬪簭锛岄渶瑕佸畨瑁?JDK銆?/div>
2. == 鍜?equals 鐨勫尯鍒槸浠€涔堬紵
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浠g爜绀轰緥锛?/div>
String x = "string";
String y = "string";
String z = new String("string");
System.out.println(x==y); // true
System.out.println(x==z); // false
System.out.println(x.equals(y)); // true
System.out.println(x.equals(z)); // true
浠g爜瑙h锛氬洜涓?x 鍜?y 鎸囧悜鐨勬槸鍚屼竴涓紩鐢紝鎵€浠?== 涔熸槸 true锛岃€?new String()鏂规硶鍒欓噸鍐欏紑杈熶簡鍐呭瓨绌洪棿锛屾墍浠?== 缁撴灉涓?false锛岃€?equals 姣旇緝鐨勪竴鐩存槸鍊硷紝鎵€浠ョ粨鏋滈兘涓?true銆?/div>
equals 瑙h
equals 鏈川涓婂氨鏄?==锛屽彧涓嶈繃 String 鍜?Integer 绛夐噸鍐欎簡 equals 鏂规硶锛屾妸瀹冨彉鎴愪簡鍊兼瘮杈冦€傜湅涓嬮潰鐨勪唬鐮佸氨鏄庣櫧浜嗐€?/div>
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