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Java 闈㈣瘯棰樻暣鐞?PDF 涓嬭澆
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閾炬帴錛?a target="_blank">https://pan.baidu.com/s/1h7eNe3SmCOjzfwFT_uWJ0w
鎻愬彇鐮侊細mggx
鐩稿叧鎴浘錛?/strong>
涓昏鍐呭錛?/strong>
1.璋堣皥浣犲Java鍜孋鐨勭悊瑙ｏ紵
Java錛?span style="white-space:pre">
闈㈠悜瀵硅薄銆乁nicode錛氬彲浠ヨ法騫沖彴錛圝VM榪愯錛夛紝鍙互鍒嗗竷寮忥紝鐩稿C閫熷害浼氭參
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鐗圭偣錛氶€熷害蹇紙Linux銆丯ginx錛夈€佹敞閲嶇畻娉?/div>
鍙橀噺鍙互涓嶈繘琛屽垵濮嬪寲
2.super涓巘his鍖哄埆
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super鐖剁被瀵硅薄錛屽彈緇ф壙鐨勭害鏉熻鍒?/div>
錛堜緥錛氬瓙綾繪瀯閫犲嚱鏁頒腑榛樿瀛樺湪super錛屽綋鐖剁被娌℃湁鏃犲弬鏋勯€犲嚱鏁版垨鑰呰縐佹湁鍖栵紝鍒欏彉寮傛姤閿欙紝蹇呴』鎵嬪姩娣誨姞鐖剁被鏃犲弬鏋勯€狅紙榛樿緙虹渷錛夛級
3.public錛氬叏灞€
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Privat錛氱被鍐?/div>
4.java浜嬩歡濮旀墭鏈哄埗
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5.鍨冨溇鍥炴敹鏈哄埗
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6.浠€涔堟槸java搴忓垪鍖?/div>
灝嗕竴涓璞′繚瀛樺埌涓€涓枃浠訛紝騫朵笖鍙互閫氳繃嫻佺殑鏂瑰紡榪涜浼犺緭銆傚疄鐜癝erializable鎺ュ彛
7.涓€涓?java"婧愭枃浠朵腑鏄惁鍙互鍖呮嫭澶氫釜綾伙紙涓嶆槸鍐呴儴綾伙級錛熸湁浠€涔堥檺鍒訛紵
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8.Override鍜孫verload鐨勫尯鍒?/div>
Override鏄噸鍐欙紝瀛愮被瑕嗙洊鐖剁被鏂規(guī)硶
Overload鏄噸杞斤紝涓€涓被澶氫釜鏂規(guī)硶錛屾柟娉曞悕鐩稿悓錛屽弬鏁頒笉鍚?/div>
9.Final綾葷壒鐐?/div>
灞炴€у父閲?/div>
鏂規(guī)硶涓嶅彲琚噸鍐?/div>
綾諱笉鍙互琚戶鎵?/div>
10.涓€鑸殑鎺掑簭鏂瑰紡
閫夋嫨鎺掑簭鎬濊礬錛氬灞備粠鏁扮粍i錛?錛変綅寮€濮嬶紝鍐呭眰浠巎=i寮€濮嬶紝i++j++閬嶅巻鏁翠釜鏁扮粍錛屾壘鍒版渶灝忓€間綅j錛宨j閫氳繃涓棿鍊糾鎹綅 i++
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If(a[j]>a[j+1]){
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11.鎶借薄綾誨拰鎺ュ彛鐨勫尯鍒?/div>
鎺ュ彛鍙互琚瀹炵幇錛屾娊璞＄被鍙兘琚崟涓€緇ф壙
鎺ュ彛鍙湁鏂規(guī)硶瀹氫箟錛屾娊璞＄被鍙互鏈夋柟娉曞畾涔夊拰瀹炵幇
鎺ュ彛鐨勫瓧孌靛畾涔夋槸public static final鐨勶紝鎶借薄綾繪槸鏈寘鍙
12.浠€涔堟槸綾葷殑鍙嶅皠鏈哄埗
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13.Java鑾峰緱騫存湀鏃?/div>
Calendar c=Calendar.getInstance();
c.set(Calendar.YEAR,2004);
c.set(Calendar.MONTH,0);
c.set(Calendar.DAY_OF_MONTH,31);
System.out.println(c.get(Calendar.YEAR)+""+(c.get(Calendar.MONTH)+1)+""+c.get(Calendar.DAY_OF_MONTH));
Java鑾峰彇姣鏁?/div>
Date d = new Date();
Long l = d.getTime();
14.Java綆€鍗曞疄鐜扮紪鐮佽漿鎹?/div>
String a = new String(“閮芥槸闈犳妧鏈?rdquo;.getBytes(“charset”),”charset”);
15.綆€鍗曚粙緇嶄竴涓婮ava鍐呭瓨婧㈠嚭銆佸唴瀛樻硠婕?/div>
鍐呭瓨婧㈠嚭 out of memory 鍐呭瓨婊′簡銆傛寰幆杈撳嚭鎴栧ぇ閲忔暟鎹簱璇誨彇鎴朖VM鍐呭瓨榪囧皬 姝誨驚鐜痑ppend瀛楃涓?/div>
鍐呭瓨娉勬紡 memory leak 鏃犵敤瀵硅薄鎸佺畫鍗犲唴瀛樸€?close()鏂規(guī)硶涓㈠け
16.Java澶氭€佸疄鐜?/div>
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17.綆€榪癑ava鍨冨溇鍥炴敹鏈哄埗
鍔ㄦ€佸唴瀛橈細綾誨疄渚?/div>
闈欐€佸唴瀛橈細綾繪湰韜?/div>
鍨冨溇鏀墮泦涓昏閽堝鐨勬槸鍔ㄦ€佸唴瀛橈紝涓€鑸綋鍐呭瓨涓嶅鐢ㄦ椂浼氳繘琛屽瀮鍦炬敹闆嗐€?/div>
鍙互閫氳繃System.gc()鎵嬪姩鍥炴敹錛屼絾鏄笉涓€瀹氭墽琛屻€?/div>
18.璋堣皥Java鐨凧VM鍐呭瓨鏈哄埗錛?璋堣皥Java 鍫嗐€佹爤銆佹柟娉曞尯閮芥槸騫蹭粈涔堢殑錛?/div>
鍫嗭細 鍙瓨鏀懼璞℃湰韜?/div>
鏍堬細 鍙瓨鏀懼熀鏈被鍨嬪拰瀵硅薄鐨勫紩鐢?Stack.push Stack.pop
鏂規(guī)硶鍖猴細鍙堝彨闈欐€佸尯錛屽寘鍚墍鏈夌殑class綾匯€乻tatic鍙橀噺銆佸父閲忔睜錛堢被甯擱噺鍜屽瓧絎︿覆甯擱噺1.7浠ュ悗瀛楃涓插父閲忔睜鏀懼埌浜嗗爢涓暟瀛楀父閲忔睜錛?128-127錛夛級銆傜壒鐐瑰敮涓€
19.綆€榪扮被鍔犺澆榪囩▼錛熸弿榪頒竴涓婮VM鍔犺澆Class鏂囦歡鐨勫師鐞嗘満鍒訛紵
JVM涓被鐨勫姞杞芥槸鐢盋lassLoader鍜屼粬鐨勫瓙綾繪潵瀹炵幇鐨勶紝綾誨姞杞藉櫒鍦↗VM铏氭嫙鏈轟腑
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20.璋堣皥JVM鐨勪紭鍖栵紵
21.Java濡備綍澶勭悊寮傚父錛?/div>
Try-catch-finally
Throws 鏂規(guī)硶鎴栫被鎶涘嚭寮傚父
Throw 浠ｇ爜鍧楁姏鍑哄紓甯?throw new ServiceException(“”);
22.璋堣皥瀵箃ring StringBuffer StringBuilder鐨勭悊瑙ｏ紵
String 闀垮害涓嶅彲鍙?+鍙鋒嫾鎺ユ參
StringBuffer 鎷兼帴瀛楃涓?鐗圭偣錛氬揩銆佺嚎紼嬪畨鍏?/div>
StringBuilder 鎷兼帴瀛楃涓?鐗圭偣錛氶潪甯稿揩銆佺嚎紼嬩笉瀹夊叏
23.闆嗗悎鐨勪綔鐢ㄦ槸浠€涔堬紵璋堣皥List銆丼et銆丮ap銆傦紙娉ㄦ剰Map璺烲ist錛孲et涓嶅悓闅跺睘浜嶤ollection錛?/div>
闆嗗悎鐨勪竴澶х壒鐐規(guī)槸娉涘瀷銆佸瓨鏀句笉鍚岀被鍨?/div>
List 鏈夊簭鐨勫彲閲嶅 ArraysList鏁扮粍鍌ㄥ瓨錛屼換鎰忎綅緗闂晥鐜囬珮錛?LinkedList閾捐〃鍌ㄥ瓨錛屼袱绔晥鐜囬珮
Set 鏃犲簭鐨勪笉閲嶅 鍖哄垎閲嶅鐨勬柟娉曪細鍏堟瘮杈僪ashcode 鍦╡quals 閮界浉絳夊垯鐩哥瓑
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