public class Cell {
// 緇嗚優澹?/span>
private String cellWall = null;
// 緇嗚優鑶?/span>
private String membrane = null;
// 緇嗚優鏍?/span>
private String nucleus = null;
/**
* 鐪佺暐get銆乻et鏂規硶
*/
瀹㈡埛绔皟鐢細
// 浜х敓緇嗚優A
Cell cellA = new Cell("緇嗚優澹?/span>", "緇嗚優鑶?/span>", "緇嗚優鏍?/span>");
/* 浜х敓涓嶢鍚屾牱鐨勭粏鑳濨 */
Cell cellB = new Cell();
cellB.setCellWall(cellA.getCellWall());
cellB.setMembrane(cellA.getMembrane());
cellB.setNucleus(cellB.getNucleus());
榪欑綣佺悙鑰岄噸澶嶆ч珮鐨勫鍒惰兘涓嶈兘鍙啓涓閬嶅憿錛熺瓟妗堟槸“鏈?#8221;// 緇嗚優澹?/span>
private String cellWall = null;
// 緇嗚優鑶?/span>
private String membrane = null;
// 緇嗚優鏍?/span>
private String nucleus = null;
/**
* 鐪佺暐get銆乻et鏂規硶
*/
瀹㈡埛绔皟鐢細
// 浜х敓緇嗚優A
Cell cellA = new Cell("緇嗚優澹?/span>", "緇嗚優鑶?/span>", "緇嗚優鏍?/span>");
/* 浜х敓涓嶢鍚屾牱鐨勭粏鑳濨 */
Cell cellB = new Cell();
cellB.setCellWall(cellA.getCellWall());
cellB.setMembrane(cellA.getMembrane());
cellB.setNucleus(cellB.getNucleus());
public class Cell implements Cloneable {
// 緇嗚優澹?/span>
private String cellWall = null;
// 緇嗚優鑶?/span>
private String membrane = null;
// 緇嗚優鏍?/span>
private String nucleus = null;
public Cell clone() throws CloneNotSupportedException {
return (Cell)super.clone();
}
瀹㈡埛绔皟鐢細
public class PrototypeClient {
public static void main(String[] args) throws CloneNotSupportedException {
// 浜х敓緇嗚優A
Cell cellA = new Cell("緇嗚優澹?/span>", "緇嗚優鑶?/span>", "緇嗚優鏍?/span>");
/* 浜х敓涓嶢鍚屾牱鐨勭粏鑳濨 */
Cell cellB = cellA.clone();
System.out.println(cellA == cellB);
}
}
涓婅堪紼嬪簭榪愯鐨勭粨鏋滀負false錛岃鏄巆lone()鍦ㄥ唴瀛樺尯寮杈熶簡鍙︿竴鍧楀紩鐢ㄣ備互涓婄殑clone鏂規硶涔熻縐頒負“嫻呭害鎷瘋礉”錛屽叧浜庢繁搴︽嫹璐濊繖閲屽氨涓嶅仛璇﹁浜嗐?br />
// 緇嗚優澹?/span>
private String cellWall = null;
// 緇嗚優鑶?/span>
private String membrane = null;
// 緇嗚優鏍?/span>
private String nucleus = null;
public Cell clone() throws CloneNotSupportedException {
return (Cell)super.clone();
}
瀹㈡埛绔皟鐢細
public class PrototypeClient {
public static void main(String[] args) throws CloneNotSupportedException {
// 浜х敓緇嗚優A
Cell cellA = new Cell("緇嗚優澹?/span>", "緇嗚優鑶?/span>", "緇嗚優鏍?/span>");
/* 浜х敓涓嶢鍚屾牱鐨勭粏鑳濨 */
Cell cellB = cellA.clone();
System.out.println(cellA == cellB);
}
}
鍦ㄤ竴涓鏉傜殑綾誨眰嬈″綋涓紝褰撶郴緇熷繀欏諱粠鍏朵腑鐨勮澶氱被鍨嬪垱寤烘柊瀵硅薄鏃訛紝鍙互鑰冭檻鍘熷瀷銆?br />
]]>
鎶借薄宸ュ巶妯″紡鏄墍鏈夊艦鎬佺殑宸ュ巶妯″紡涓渶涓烘娊璞″拰鏈鍏蜂竴鑸х殑涓縐嶅艦鎬併?/p>
涓轟簡鏂逛究寮曡繘鎶借薄宸ュ巶妯″紡錛屽紩榪涗竴涓柊姒傚康錛?font color="#000080">浜у搧鏃忥紙Product Family錛?/font>銆傛墍璋撲駭鍝佹棌錛屾槸鎸囦綅浜庝笉鍚屼駭鍝佺瓑綰х粨鏋勶紝鍔熻兘鐩稿叧鑱?/span>鐨勪駭鍝?/span>緇勬垚鐨勫鏃忋傚鍥撅細
鍥句腑涓鍏辨湁鍥涗釜浜у搧鏃忥紝鍒嗗竷浜庝笁涓笉鍚岀殑浜у搧絳夌駭緇撴瀯涓傚彧瑕佹寚鏄庝竴涓駭鍝佹墍澶勭殑浜у搧鏃忎互鍙婂畠鎵灞炵殑絳夌駭緇撴瀯錛屽氨鍙互鍞竴鐨勭‘瀹氳繖涓駭鍝併?/p>
鎵璋撶殑鎶借薄宸ュ巶鏄寚涓涓伐鍘傜瓑綰х粨鏋勫彲浠ュ垱寤哄嚭鍒嗗睘浜庝笉鍚屼駭鍝佺瓑綰х粨鏋勭殑涓涓駭鍝佹棌涓殑鎵鏈夊璞°傚鏋滅敤鍥炬潵鎻忚堪鐨勮瘽錛屽涓嬪浘錛?/p>
AbstractFactory妯″紡鐨勭粨鏋勫涓嬶細
鍥句腑AfricanPig鍜孉siaPig鏋勬垚涓涓瓑綰х粨鏋勶紝AfiricanPorkFactory鐢熶駭鍑烘潵鐨勫寘鎷珹fricanPig鍜孉fricanDuck鏋勬垚涓涓駭鍝佹棌銆?/p>
鎶借薄宸ュ巶錛圓bstract Factory錛夎鑹詫細鎷呬換榪欎釜瑙掕壊鐨勬槸宸ュ巶鏂規硶妯″紡鐨勬牳蹇冿紝瀹冩槸涓庡簲鐢ㄧ郴緇熷晢涓氶昏緫鏃犲叧鐨勩?
鍏蜂綋宸ュ巶錛圕oncrete Factory錛夎鑹詫細榪欎釜瑙掕壊鐩存帴鍦ㄥ鎴風鐨勮皟鐢ㄤ笅鍒涘緩浜у搧鐨勫疄渚嬨傝繖涓鑹插惈鏈夐夋嫨鍚堥傜殑浜у搧瀵硅薄鐨勯昏緫錛岃岃繖涓昏緫鏄笌搴旂敤緋葷粺鐨勫晢涓氶昏緫绱у瘑鐩稿叧鐨勩?/p>
鎶借薄浜у搧錛圓bstract Product錛夎鑹詫細鎷呬換榪欎釜瑙掕壊鐨勭被鏄伐鍘傛柟娉曟ā寮忔墍鍒涘緩鐨勫璞＄殑鐖剁被錛屾垨瀹冧滑鍏卞悓鎷ユ湁鐨勬帴鍙ｃ?/p>
鍏蜂綋浜у搧錛圕oncrete Product錛夎鑹詫細鎶借薄宸ュ巶妯″紡鎵鍒涘緩鐨勪換浣曚駭鍝佸璞￠兘鏄煇涓涓叿浣撲駭鍝佺被鐨勫疄渚嬨傝繖鏄鎴風鏈緇堥渶瑕佺殑涓滆タ錛屽叾鍐呴儴涓瀹氬厖婊′簡搴旂敤緋葷粺鐨勫晢涓氶昏緫銆?br />
涓婂浘鐨勭▼搴忓涓嬶細
public interface Duck {
public void send();
}
public class AsiaDuck implements Duck {
public void send() {
System.out.println("send Asia duck");
}
}
public class AfricanDuck implements Duck {
public void send() {
System.out.println("send African duck");
}
}
public interface Pig {
public void send();
}
public class AsiaPig implements Pig {
public void send() {
System.out.println("send Asia pig");
}
}
public class AfricanPig implements Pig {
public void send() {
System.out.println("send African pig");
}
}
public abstract class AbstractFactory {
public abstract Pig createPig();
public abstract Duck createDuck();
}
public class AfricanPorkFactory extends AbstractFactory {
@Override
public Duck createDuck() {
return new AfricanDuck();
}
@Override
public Pig createPig() {
return new AfricanPig();
}
}
public class AsiaPorkFactory extends AbstractFactory {
@Override
public Duck createDuck() {
return new AsiaDuck();
}
@Override
public Pig createPig() {
return new AsiaPig();
}
}
public class PorkStoreClient {
private Pig pig = null;
private Duck duck = null;
public PorkStoreClient(AbstractFactory factory) {
pig = factory.createPig();
duck = factory.createDuck();
}
public void send() {
pig.send();
duck.send();
}
public static void main(String[] args) {
AbstractFactory africanFactory = new AfricanPorkFactory();
PorkStoreClient africanPorkStore = new PorkStoreClient(africanFactory);
africanPorkStore.send();
AbstractFactory asiaFactory = new AsiaPorkFactory();
PorkStoreClient asiaPorkStore = new PorkStoreClient(asiaFactory);
asiaPorkStore.send();
}
}
涓婅堪鐨勫満鏅彲鑳戒笉鏄緢濂界殑闃愯堪浜嗘娊璞″伐鍘傜殑搴旂敤錛屼絾鎴戜滑濡傛灉鎹釜鍦烘櫙鍛紵鎶妕ext鍜宐utton浣滀負浜у搧錛岃孶nixText鍜孶nixButton鏋勬垚Unix浜у搧鏃忥紝WinText鍜學inButton浣滀負Window浜у搧鏃忋傝繕鏈夋苯杞︾殑闆墮儴浠剁瓑絳夊満鏅兘鑳借浣犳洿鍔犱簡瑙ｆ娊璞″伐鍘傜殑搴旂敤銆?br />
public void send();
}
public class AsiaDuck implements Duck {
public void send() {
System.out.println("send Asia duck");
}
}
public class AfricanDuck implements Duck {
public void send() {
System.out.println("send African duck");
}
}
public interface Pig {
public void send();
}
public class AsiaPig implements Pig {
public void send() {
System.out.println("send Asia pig");
}
}
public class AfricanPig implements Pig {
public void send() {
System.out.println("send African pig");
}
}
public abstract class AbstractFactory {
public abstract Pig createPig();
public abstract Duck createDuck();
}
public class AfricanPorkFactory extends AbstractFactory {
@Override
public Duck createDuck() {
return new AfricanDuck();
}
@Override
public Pig createPig() {
return new AfricanPig();
}
}
public class AsiaPorkFactory extends AbstractFactory {
@Override
public Duck createDuck() {
return new AsiaDuck();
}
@Override
public Pig createPig() {
return new AsiaPig();
}
}
public class PorkStoreClient {
private Pig pig = null;
private Duck duck = null;
public PorkStoreClient(AbstractFactory factory) {
pig = factory.createPig();
duck = factory.createDuck();
}
public void send() {
pig.send();
duck.send();
}
public static void main(String[] args) {
AbstractFactory africanFactory = new AfricanPorkFactory();
PorkStoreClient africanPorkStore = new PorkStoreClient(africanFactory);
africanPorkStore.send();
AbstractFactory asiaFactory = new AsiaPorkFactory();
PorkStoreClient asiaPorkStore = new PorkStoreClient(asiaFactory);
asiaPorkStore.send();
}
}
鎶借薄宸ュ巶妯″紡涓庡伐鍘傛柟娉曟ā寮忕殑鍖哄埆
宸ュ巶鏂規硶妯″紡鏄竴縐嶆瀬绔儏鍐電殑鎶借薄宸ュ巶妯″紡錛岃屾娊璞″伐鍘傛ā寮忓彲浠ョ湅鎴愭槸宸ュ巶鏂規硶妯″紡鐨勪竴縐嶆帹騫褲?
(1)銆佸伐鍘傛柟娉曟ā寮忔槸鐢ㄦ潵鍒涘緩涓涓駭鍝佺殑絳夌駭緇撴瀯鐨勶紝鑰屾娊璞″伐鍘傛ā寮忔槸鐢ㄦ潵鍒涘緩澶氫釜浜у搧鐨勭瓑綰х粨鏋勭殑銆傚伐鍘傛柟娉曞垱寤轟竴鑸彧鏈変竴涓柟娉曪紝鍒涘緩涓縐嶄駭鍝併傛娊璞″伐鍘備竴鑸湁澶氫釜鏂規硶錛屽垱寤轟竴緋誨垪浜у搧銆?
(2)銆佸伐鍘傛柟娉曟ā寮忓彧鏈変竴涓娊璞′駭鍝佺被錛岃屾娊璞″伐鍘傛ā寮忔湁澶氫釜銆傚伐鍘傛柟娉曟ā寮忕殑鍏蜂綋宸ュ巶綾誨彧鑳藉垱寤轟竴涓叿浣撲駭鍝佺被鐨勫疄渚嬶紝鑰屾娊璞″伐鍘傛ā寮忓彲浠ュ垱寤哄涓?
]]>
鍘熷厛鎴戜滑鍙兘浼氬湪瀹㈡埛绔洿鎺ヨ皟鐢ㄦ瘮濡侾ig asiaPig = new AsiaPig()涔嬬被鐨勪唬鐮侊紝浣嗙幇鍦ㄦ垜浠彧闇璋冪敤PigFactory.createPig(***)鏉ヨ揪鍒板Pig瀹炵幇綾葷殑鍒涘緩錛岃繖鏍峰鎴風紼嬪簭涓秴綾葷殑浠ｇ爜鍜屽瓙綾誨璞＄殑鍒涘緩浠ｇ爜瑙ｈ棔浜嗐?br />
public class PigFactory {
@SuppressWarnings("unchecked")
public static Pig createPig(String pigName) {
if ("AsiaPig".equals(pigName)) {
return new AsiaPig();
} else if ("AfricanPig".equals(pigName)) {
return new AfricanPig();
} else {
return null;
}
}
}
@SuppressWarnings("unchecked")
public static Pig createPig(String pigName) {
if ("AsiaPig".equals(pigName)) {
return new AsiaPig();
} else if ("AfricanPig".equals(pigName)) {
return new AfricanPig();
} else {
return null;
}
}
}
public class PorkStore {
private static void sendPork(String pigName) {
Pig africanPig = PigFactory.createPig(pigName);
africanPig.send();
}
public static void main(String[] args) {
sendPork("AsiaPig");
sendPork("AfricanPig");
}
}
private static void sendPork(String pigName) {
Pig africanPig = PigFactory.createPig(pigName);
africanPig.send();
}
public static void main(String[] args) {
sendPork("AsiaPig");
sendPork("AfricanPig");
}
}
榪欐牱鍋氱殑鍙︿竴涓棶棰樺張鍑烘潵浜嗭紝闅忕潃if else鐨勫澶氫唬鐮佸潡鍙樼殑瓚婅秼搴炲ぇ錛岃繖鏃跺氨鍙埄鐢╦ava鐨勫彂灝勬潵榪涜鏀瑰杽浜嗭紝璋冩暣濡備笅錛?br />
package factoryMethod;
public class PigFactory {
@SuppressWarnings("unchecked")
public static Pig createPig(String pigNme) {
try {
Class animalClass = Class.forName(pigNme);
return (Pig)animalClass.newInstance();
} catch (ClassNotFoundException e) {
throw new RuntimeException("caught exception while found the class", e);
} catch (InstantiationException e) {
throw new RuntimeException("caught exception while instantiation", e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}
public class PigFactory {
@SuppressWarnings("unchecked")
public static Pig createPig(String pigNme) {
try {
Class animalClass = Class.forName(pigNme);
return (Pig)animalClass.newInstance();
} catch (ClassNotFoundException e) {
throw new RuntimeException("caught exception while found the class", e);
} catch (InstantiationException e) {
throw new RuntimeException("caught exception while instantiation", e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}
public class PorkStore {
private static void sendPork(String pigName) {
Pig africanPig = PigFactory.createPig(pigName);
africanPig.send();
}
public static void main(String[] args) {
sendPork("factoryMethod.AsiaPig");
sendPork("factoryMethod.AfricanPig");
}
}
private static void sendPork(String pigName) {
Pig africanPig = PigFactory.createPig(pigName);
africanPig.send();
}
public static void main(String[] args) {
sendPork("factoryMethod.AsiaPig");
sendPork("factoryMethod.AfricanPig");
}
}
鍏卞巶鏂規硶妯″紡瀹氫箟浜嗕竴涓垱寤哄璞＄殑鎺ュ彛錛屼絾鐢卞瓙綾誨喅瀹氳瀹炰緥鍖栫殑綾繪槸鍝竴涓紝璁╃被鎶婂疄渚嬪寲鎺ㄨ繜鍒板瓙綾?/strong>銆?br />
]]>
public class Singleton {
private static Singleton instance = null;
private Singleton () { }
public static Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
}
private static Singleton instance = null;
private Singleton () { }
public static Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
}
鍒濈湅璧鋒潵榪欐浠ｇ爜娌℃湁涓鐐歸棶棰橈紝浣嗗鏋滃彂鐢熷綰跨▼鐨勬儏鍐靛憿錛熷洜涓哄綰跨▼鐨勪笉紜畾鎬э紝灝卞緢鏈夊彲鑳戒駭鐢熷緢澶氫釜Singleton瀹炰緥浜嗐傚啀鏉ユ敼鍠勪笅璁╁畠鑳藉閫傚簲澶氱嚎紼嬶紝濡備笅錛?br />
public class Singleton {
private static Singleton instance = null;
private Singleton () {}
public static synchronized Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
}
private static Singleton instance = null;
private Singleton () {}
public static synchronized Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
}
榪欐牱鍋氬綰跨▼鐨勯棶棰樻槸娑堥櫎浜嗭紝浣嗗嵈浜х敓鍙﹀鐨勯棶棰橈細浠ュ悗姣忔璁塊棶閮介渶瑕佹墽琛屽悓姝ユ柟娉曪紝浜х敓浜嗕弗閲嶇殑鎬ц兘闂銆傚啀鏉ユ敼鍠勪笅澶氱嚎紼嬶紝濡備笅錛?br />
1銆佷嬌鐢ㄦュ垏鍒涘緩瀹炰緥錛岃屼笉浣跨敤寤惰繜鍔犺澆
public class Singleton {
private static Singleton instance = new Singleton();
private Singleton () {}
public static Singleton getInstance() {
return instance;
}
}
鐜板湪鎴戜滑渚濊禆JVM鍦ㄥ姞杞借繖涓被鏃墮┈涓婂垱寤烘綾葷殑鍗曚歡瀹炰緥錛孞VM淇濊瘉鍦ㄤ換浣曠嚎紼嬭闂甶nstance闈欐佸彉閲忎箣鍓嶅厛鍒涘緩姝ゅ疄渚嬨?br />
private static Singleton instance = new Singleton();
private Singleton () {}
public static Singleton getInstance() {
return instance;
}
}
2銆佷嬌鐢ㄥ弻閲嶆鏌ュ姞閿侊紝鍦╣etInstance涓噺灝戜嬌鐢ㄥ悓姝?br />
public class Singleton {
// volatile 鏈夋晥鐨勭‘淇濆綋instance琚垵濮嬪寲鎴愬疄渚嬫椂錛屽綰跨▼姝ｇ‘鐨勫鐞唅nstance鍙橀噺銆?/span>
private volatile static Singleton instance = null;
private Singleton () {}
public static Singleton getInstance() {
// 濡傛灉瀹炰緥涓嶅瓨鍦ㄥ氨榪涘叆瀹炰緥鍧楋紝鍙湁絎竴嬈℃墠褰誨簳鎵ц榪欓噷鐨勪唬鐮併?/span>
if (instance == null) {
// 榪欓噷鏈夋晥鐨勯樆姝簡澶氱嚎紼嬮棶棰樼殑浜х敓
synchronized (Singleton.class) {
// 榪涘叆鍖哄潡鍚庯紝鍐嶆鏌ヤ竴嬈★紝鍙湁瀹炰緥涓虹┖鎵嶅垱寤哄疄渚嬨?/span>
if (instance == null) {
instance= new Singleton();
}
}
}
return instance;
}
}
// volatile 鏈夋晥鐨勭‘淇濆綋instance琚垵濮嬪寲鎴愬疄渚嬫椂錛屽綰跨▼姝ｇ‘鐨勫鐞唅nstance鍙橀噺銆?/span>
private volatile static Singleton instance = null;
private Singleton () {}
public static Singleton getInstance() {
// 濡傛灉瀹炰緥涓嶅瓨鍦ㄥ氨榪涘叆瀹炰緥鍧楋紝鍙湁絎竴嬈℃墠褰誨簳鎵ц榪欓噷鐨勪唬鐮併?/span>
if (instance == null) {
// 榪欓噷鏈夋晥鐨勯樆姝簡澶氱嚎紼嬮棶棰樼殑浜х敓
synchronized (Singleton.class) {
// 榪涘叆鍖哄潡鍚庯紝鍐嶆鏌ヤ竴嬈★紝鍙湁瀹炰緥涓虹┖鎵嶅垱寤哄疄渚嬨?/span>
if (instance == null) {
instance= new Singleton();
}
}
}
return instance;
}
}
]]>