Dua kategori corak penyesuai Java dan senario aplikasi tertentu-javaTutorial-php.cn

1. Corak Penyesuai Kelas

Kaedah pelaksanaan: Tentukan kelas penyesuai untuk melaksanakan antara muka perniagaan sistem semasa, dan pada masa yang sama mewarisi komponen yang telah wujud dalam perpustakaan komponen sedia ada.

public class HelloWorld { public static void main(String[] args) { Computer computer = new Computer(); SDCard sdCard = new SDCardImpl(); System.out.println(computer.readSD(sdCard)); System.out.println("------------"); SDAdapterTF adapter = new SDAdapterTF(); System.out.println(computer.readSD(adapter)); } } // SD卡的接口 interface SDCard { // 读取SD卡功能 String readSD(); // 写入SD卡功能 void writeSD(String msg); } // SD卡实现类 class SDCardImpl implements SDCard { @Override public String readSD() { String msg = "sd card read a msg: hello sd card"; return msg; } @Override public void writeSD(String msg) { System.out.println("sd card write msg: " + msg); } } // 电脑类 class Computer { public String readSD(SDCard sdCard) { if (sdCard == null) { throw new NullPointerException("sd card null"); } return sdCard.readSD(); } } // TF卡接口 interface TFCard { // 读取TF卡功能 String readTF(); // 写入TF卡功能 void writeTF(String msg); } // TF卡实现类 class TFCardImpl implements TFCard { @Override public String readTF() { String msg = "sd card read a msg: hello tf card"; return msg; } @Override public void writeTF(String msg) { System.out.println("tf card write msg: " + msg); } } // 定义适配器类（SD兼容TF） class SDAdapterTF extends TFCardImpl implements SDCard { @Override public String readSD() { System.out.println("adapter read tf card "); return readTF(); } @Override public void writeSD(String msg) { System.out.println("adapter write tf card"); writeTF(msg); } }

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2. Corak Penyesuai Objek

Kaedah pelaksanaan: Corak penyesuai objek boleh memperkenalkan komponen yang telah dilaksanakan dalam perpustakaan komponen sedia ada ke dalam penyesuai ini kelas Pada masa yang sama, antara muka perniagaan sistem semasa dilaksanakan.

public class HelloWorld { public static void main(String[] args) { Computer computer = new Computer(); SDCard sdCard = new SDCardImpl(); System.out.println(computer.readSD(sdCard)); System.out.println("------------"); TFCard tfCard = new TFCardImpl(); SDAdapterTF adapter = new SDAdapterTF(tfCard); System.out.println(computer.readSD(adapter)); } } // SD卡的接口 interface SDCard { // 读取SD卡功能 String readSD(); // 写入SD卡功能 void writeSD(String msg); } // SD卡实现类 class SDCardImpl implements SDCard { @Override public String readSD() { String msg = "sd card read a msg: hello sd card"; return msg; } @Override public void writeSD(String msg) { System.out.println("sd card write msg: " + msg); } } // 电脑类 class Computer { public String readSD(SDCard sdCard) { if (sdCard == null) { throw new NullPointerException("sd card null"); } return sdCard.readSD(); } } // TF卡接口 interface TFCard { // 读取TF卡功能 String readTF(); // 写入TF卡功能 void writeTF(String msg); } // TF卡实现类 class TFCardImpl implements TFCard { @Override public String readTF() { String msg = "sd card read a msg: hello tf card"; return msg; } @Override public void writeTF(String msg) { System.out.println("tf card write msg: " + msg); } } // 定义适配器类（SD兼容TF） class SDAdapterTF implements SDCard { private TFCard tfCard; public SDAdapterTF(TFCard tfCard) { this.tfCard = tfCard; } @Override public String readSD() { System.out.println("adapter read tf card "); return tfCard.readTF(); } @Override public void writeSD(String msg) { System.out.println("adapter write tf card"); tfCard.writeTF(msg); } }

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