姒傝堪锛?/p>

Java鍒涙剰璧勬枡娑电洊浜嗕粠鍩虹閰嶇疆鍒伴珮绾у簲鐢ㄧ殑鎵€鏈夊唴瀹癸紝涓哄紑鍙戣€呮彁渚涗簡涓€绔欏紡鐨凧ava缂栫▼瀛︿範浣撻獙銆傝繖浠借祫鏂欓€氳繃璇︾粏鐨勪唬鐮佺ず渚嬪拰瀹炰緥锛屾繁鍏ヨВ鏋怞ava缂栫▼鐨勬牳蹇冩蹇碉紝鍖呮嫭鐜閰嶇疆銆佸熀鏈娉曘€侀潰鍚戝璞＄紪绋嬨€侀泦鍚堟鏋躲€佸紓甯稿鐞嗕互鍙婂疄鎴橀」鐩璁°€傚叾鐩爣鍦ㄤ簬甯姪寮€鍙戣€呭湪鏋勫缓濡傚湪绾挎姇绁ㄧ郴缁熺瓑澶嶆潅椤圭洰鏃讹紝娣卞叆鐞嗚В骞跺簲鐢↗ava缂栫▼锛屾垚涓篔ava棰嗗煙鐨勫疄璺甸珮鎵嬨€?/p>

Java鍩虹璁茶В锛?/p>涓€銆佺幆澧冮厤缃笌鍩烘湰璇硶

鍚▼Java缂栫▼涔嬫梾鍓嶏紝纭繚浣犵殑瑁呭榻愬叏锛氬畨瑁匤ava杩愯鐜锛圝RE锛夊拰Java寮€鍙戝伐鍏峰寘锛圝DK锛夈€備綘鍙互鍓嶅線Oracle瀹樼綉锛屼笅杞藉苟瀹夎鏈€鏂扮増鏈殑JDK銆?/p>

鍦ㄥ懡浠よ鎴栫粓绔腑楠岃瘉JDK鐨勫畨瑁咃紝杈撳叆鍛戒护锛歫ava -version銆?/p>

鎺ヤ笅鏉ワ紝鎴戜滑灏嗘繁鍏ava鐨勫熀鏈娉曘€傝繖閲屼綘灏嗗涔犲埌濡備綍澹版槑鍙橀噺銆佸畾涔夋暟鎹被鍨嬨€佷娇鐢ㄨ繍绠楃绛夈€傜湅浠ヤ笅绀轰緥锛?/p>

public class HelloWorld {

public static void main(String[] args) {

// 鍒濆鍖栧苟瀹氫箟涓€涓暣鍨嬪彉閲?/p>

int age = 25;

// 鎵撳嵃鍙橀噺age

System.out.println("鎴戜粖骞? + age + "宀併€?);

// 瀛楃涓叉嫾鎺?/p>

String name = "灏忔槑";

System.out.println("浣犲ソ锛? + name + "銆?);

// 杩愮敤杩愮畻绗?/p>

int result = 10 + 20; // 鍔犳硶

System.out.println("10 + 20 = " + result);

int a = 10;

int b = 5;

int c = a b; // 涔樻硶

System.out.println("10 5 = " + c);

}

}

闈㈠悜瀵硅薄缂栫▼锛圤OP锛夋槸Java鐨勬牳蹇冪壒鎬т箣涓€銆傞€氳繃绫汇€佸璞°€佸皝瑁呫€佺户鎵垮拰澶氭€佺瓑姒傚康锛屾垜浠彲浠ユ洿鏈夋晥鍦扮粍缁囦唬鐮併€?/p>

1. 绫讳笌瀵硅薄锛氱被鏄璞＄殑鎶借薄鎻忚堪锛屽畠瀹氫箟浜嗗璞＄殑灞炴€э紙鏁版嵁锛夊拰琛屼负锛堟柟娉曪級銆備笅闈㈡槸涓€涓畝鍗曠殑Person绫荤殑绀轰緥锛?/p>

public class Person {

private String name;

private int age;

public Person(String name, int age) {

this.name = name;

this.age = age;

}

// getter鍜宻etter鏂规硶...

public void introduce() {

System.out.println("鎴戝彨 " + name + "锛屼粖骞?" + age + " 宀併€?);

}

}

2. 灏佽銆佺户鎵夸笌澶氭€侊細

灏佽锛氶€氳繃灏嗗睘鎬ц涓虹鏈夊苟鎻愪緵鍏叡鎺ュ彛鏉ヤ繚鎶ょ被鐨勫唴閮ㄧ粨鏋勩€傝繖澧炲己浜嗕唬鐮佺殑瀹夊叏鎬у拰鍙淮鎶ゆ€с€?/p>

缁ф壙锛氬厑璁稿垱寤轰竴涓被浠庣幇鏈夌被锛堝熀绫绘垨瓒呯被锛夌户鎵垮睘鎬у拰鏂规硶锛屽疄鐜颁唬鐮佺殑澶嶇敤銆傝繖鏈夊姪浜庢瀯寤烘洿澶嶆潅銆佹洿寮哄ぇ鐨勭郴缁熴€?/p>

澶氭€侊細鍏佽涓嶅悓绫荤殑瀵硅薄瀵瑰悓涓€娑堟伅鍋氬嚭鍝嶅簲锛屽疄鐜版洿鐏垫椿鐨勪唬鐮佺粨鏋勩€傝繖浣垮緱鎴戜滑鍙互鏍规嵁涓嶅悓鐨勫璞＄被鍨嬫墽琛屼笉鍚岀殑鎿嶄綔锛屽寮轰簡浠ｇ爜鐨勫彲鎵╁睍鎬с€侸ava鐨勪笘鐣屼腑鐨勫鐢熶笌鑰佸笀锛屼互鍙奐ava闆嗗悎妗嗘灦鐨勫ゥ绉?/p>

鍦↗ava鐨勭紪绋嬩笘鐣屼腑锛屾垜浠湁鏃朵細閬囧埌鍚勭鍚勬牱鐨勭被锛屽畠浠儚鐜板疄鐢熸椿涓殑瑙掕壊涓€鏍蜂赴瀵屽褰┿€傝鎴戜滑鍏堟潵鐪嬬湅涓や釜鍩虹鐨勮鑹测€斺€擲tudent锛堝鐢燂級鍜孴eacher锛堣€佸笀锛夈€?/p>

Student绫荤户鎵夸簡Person绫伙紝鎷ユ湁涓€涓壒鏈夌殑灞炴€р€斺€擥PA锛坓rade point average锛屾垚缁╃偣鏁板钩鍧囧€硷級銆傛瘡褰撳垱寤轰竴涓柊鐨凷tudent瀵硅薄鏃讹紝鎴戜滑閮介渶瑕佷负鍏舵寚瀹氫竴涓悕瀛椼€佸勾榫勫拰GPA銆傚湪浠嬬粛鑷繁鏃讹紝Student浼氬厛璋冪敤鐖剁被Person鐨刬ntroduce鏂规硶锛岀劧鍚庡叕甯冭嚜宸辩殑GPA銆?/p>

鑰孴eacher绫诲悓鏍风户鎵夸簡Person绫伙紝骞堕澶栨嫢鏈変竴涓猻ubject锛堢鐩級灞炴€с€傚綋鎴戜滑鍒涘缓涓€涓柊鐨凾eacher瀵硅薄鏃讹紝闇€瑕佷负鍏舵寚瀹氬悕瀛椼€佸勾榫勫拰鎵€鏁欐巿鐨勭鐩€傚綋鑰佸笀浠嬬粛鑷繁鏃讹紝浼氬叕甯冭嚜宸辨墍鏁欐巿鐨勭鐩€?/p>

鍦↗ava鐨勪笘鐣屼腑锛岄櫎浜嗚繖浜涚敓鍔ㄧ殑浜虹墿瑙掕壊澶栵紝杩樻湁涓€涓噸瑕佺殑妗嗘灦鈥斺€擩ava闆嗗悎妗嗘灦銆傝繖涓鏋舵彁渚涗簡涓€绯诲垪鐢ㄤ簬绠＄悊鍜屾搷浣滈泦鍚堟暟鎹殑绫汇€備簡瑙ｈ繖浜涚被鐨勭壒鎬у拰浣跨敤鍦烘櫙锛屽彲浠ュ府鍔╂垜浠洿鏈夋晥鍦拌繘琛岀紪绋嬨€?/p>

ArrayList锛氬氨鍍忎竴涓彲鍙樺ぇ灏忕殑鏁扮粍锛屽畠鏄垜浠鐞嗘暟鎹椂鐨勫緱鍔涘姪鎵嬨€傚綋浣犻渶瑕侀绻佹坊鍔犳垨鍒犻櫎鍏冪礌鏃讹紝ArrayList浼氭槸浣犵殑棣栭€夈€?/p>

HashMap锛氳繖鏄竴涓熀浜庡搱甯岃〃瀹炵幇鐨勯泦鍚堬紝瀹冪殑鏌ユ壘鏁堢巼闈炲父楂樸€傚綋浣犻渶瑕佸揩閫熸煡鎵句竴涓厓绱犳椂锛孒ashMap浼氭槸浣犵殑鏈€浣抽€夋嫨銆?/p>

HashSet锛氳繖鏄竴涓敤浜庡瓨鍌ㄤ笉閲嶅鍏冪礌鐨勯泦鍚堬紝涔熸槸鍩轰簬鍝堝笇琛ㄥ疄鐜扮殑銆傚綋浣犻渶瑕佷竴涓兘鑷姩鍘婚噸鐨勯泦鍚堟椂锛孒ashSet灏辨淳涓婄敤鍦轰簡銆?/p>

Java闆嗗悎妗嗘灦鐨勮繖浜涚被閮芥湁瀹冧滑鐙壒鐨勭壒鎬у拰浣跨敤鍦烘櫙锛屾垜浠渶瑕佹牴鎹叿浣撶殑闇€姹傞€夋嫨鍚堥€傜殑绫绘潵绠＄悊鍜屾搷浣滈泦鍚堟暟鎹€傝繖鏍凤紝鎴戜滑鐨勪唬鐮佸氨浼氭洿鍔犵畝娲併€侀珮鏁堬紝鑰屼笖鏄撲簬缁存姢銆侸ava闆嗗悎姒傝

鍦↗ava缂栫▼涓紝闆嗗悎妗嗘灦鏄暟鎹鐞嗙殑鏍稿績閮ㄥ垎銆傛兂璞′竴涓嬩綘鏈変竴浜涚墿鍝佸苟鎯冲皢瀹冧滑鍒嗙被瀛樺偍锛岃繖灏辨槸闆嗗悎鎵€鍋氱殑浜嬫儏銆備互涓嬫槸鍑犵甯歌鐨凧ava闆嗗悎绫诲瀷鐨勫熀鏈ず渚嬶細

ArrayList 鏄竴涓姩鎬佹暟缁勶紝瀹冨彲浠ユ牴鎹渶瑕佸闀挎垨缂╁皬銆傜ず渚嬩唬鐮佸涓嬶細

```java

ArrayList list = new ArrayList<>();

list.add("Item 1");

list.add("Item 2");

list.add("Item 3");

System.out.println("ArrayList鍐呭: " + list);

```

```java

LinkedList linkList = new LinkedList<>();

linkList.add("Item 1");

linkList.addFirst("Item 0");

System.out.println("LinkedList鍐呭: " + linkList);

```

HashMap 鏄竴绉嶅瓨鍌ㄩ敭鍊煎鐨勬暟鎹粨鏋勶紝鍙互蹇€熷湴鏍规嵁閿煡鎵惧€笺€傜ず渚嬩唬鐮佸涓嬶細

```java

HashMap map = new HashMap<>();

map.put("Item 1", 1);

map.put("Item 2", 2);

System.out.println("HashMap鍐呭: " + map);

```

HashSet 鏄彟涓€绉嶉泦鍚堢被鍨嬶紝瀹冧笉鍏佽瀛樺偍閲嶅鐨勫厓绱犮€傜ず渚嬩唬鐮佸涓嬶細

```java

HashSet set = new HashSet<>();

set.add("Item 1");

set.add("Item 2");

set.add("Item 3");

System.out.println("HashSet鍐呭: " + set);

```

---

Java寮傚父澶勭悊鐨勯噸瑕佹€?/p>

鍦ㄧ紪绋嬩腑锛屽鐞嗗彲鑳藉嚭鐜扮殑寮傚父鎯呭喌鑷冲叧閲嶈銆侸ava鎻愪緵浜嗗己澶х殑寮傚父澶勭悊鏈哄埗锛岄€氳繃try-catch-finally璇彞鏉ョ‘淇濈▼搴忕殑绋冲畾鎬у拰鍋ュ．鎬с€備互涓嬫槸涓€涓畝鍗曠殑绀轰緥锛?/p>

褰撳嚭鐜伴櫎鏁颁负闆剁殑鎯呭喌鏃讹紝绋嬪簭浼氭崟鑾稟rithmeticException寮傚父骞惰緭鍑洪敊璇俊鎭€傛棤璁烘槸鍚﹀彂鐢熷紓甯革紝finally鍧椾腑鐨勪唬鐮侀兘浼氳鎵ц锛岀‘淇濊祫婧愬緱鍒版纭叧闂垨娓呯悊銆?/p>

绀轰緥浠ｇ爜濡備笅锛?/p>

Java 鏂囦欢鎿嶄綔鑼冧緥

鍦?Java 鐨勪笘鐣岄噷锛屾枃浠舵搷浣滄槸涓嶅彲鎴栫己鐨勪竴閮ㄥ垎銆備笅闈㈡槸涓€涓畝鍗曠殑渚嬪瓙锛屽睍绀轰簡濡備綍浣跨敤 Java 杩涜鏂囦欢鐨勫啓鍏ュ拰璇诲彇銆?/p>

璁╂垜浠皾璇曞啓鍏ヤ竴涓枃鏈枃浠讹細

```java

import java.io.;

public class FileIOExample {

public static void main(String[] args) {

try (FileWriter writer = new FileWriter("example.txt")) {

writer.write("浣犲ソ锛孞ava!"); // 灏嗗瓧绗︿覆鍐欏叆鏂囦欢

} catch (IOException e) {

System.err.println("鏂囦欢鍐欏叆鍙戠敓閿欒锛?);

e.printStackTrace(); // 鎵撳嵃閿欒鍫嗘爤淇℃伅

}

鎺ョ潃锛屾垜浠潵璇诲彇鍒氭墠鍐欏叆鐨勬枃浠跺唴瀹癸細

try (BufferedReader reader = new BufferedReader(new FileReader("example.txt"))) {

String line; // 澹版槑涓€涓瓧绗︿覆鍙橀噺鏉ヤ繚瀛樿鍙栫殑姣忎竴琛屽唴瀹?/p>

while ((line = reader.readLine()) != null) { // 寰幆璇诲彇鏂囦欢鐨勬瘡涓€琛岋紝鐩村埌鏂囦欢鏈熬

System.out.println(line); // 杈撳嚭璇诲彇鐨勫唴瀹?/p>

}

} catch (IOException e) {

System.err.println("鏂囦欢璇诲彇鍙戠敓閿欒锛?);

e.printStackTrace(); // 鎵撳嵃閿欒鍫嗘爤淇℃伅

}

}

}

```

鎺ヤ笅鏉ワ紝璁╂垜浠竴璧疯笍鍏ュ疄鎴橀」鐩?鈥斺€?鏋勫缓涓€涓畝鍗曠殑鍦ㄧ嚎鎶曠エ绯荤粺銆傝繖灏嗘槸妫€楠屾垜浠箣鍓嶅涔犵殑 Java 鐭ヨ瘑鐨勫ぇ濂芥満浼氥€傝鎴戜滑涓€鎺㈢┒绔燂紒

鍦ㄧ嚎鎶曠エ绯荤粺瀹炴垬椤圭洰姒傝

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