Common patterns in Java learning---

common patterns for Java

Adapter mode

1  PackageCom.huawei;2 3 ImportJava.io.BufferedReader;4 Importjava.io.IOException;5 ImportJava.io.InputStreamReader;6 7 Importjava.util.Observable;8 ImportJava.util.Observer;9 Ten InterfaceWindow One { A      Public  voidopen (); -      Public  voidclose (); -      Public  voidactive (); the } -  - Abstract classWindowadapterImplementsWindow - { +      Public  voidopen () {} -      Public  voidclose () {} +      Public  voidactive () {} A } at  - classWindowimplextendsWindowadapter - { -      Public  voidOpen () -     { -System.out.println ("Open ..."); in     } -      Public  voidClose () to     { +System.out.println ("Close ..."); -     } the      Public  voidActive () *     { $System.out.println ("Active ...");Panax Notoginseng     } - } the  +  A  Public classFornumber the { +      Public Static voidMain (String args[]) -     { $Window win =NewWindowimpl (); $ Win.open (); - win.close (); -     } the}

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Factory mode

1  PackageCom.huawei;2 3 ImportJava.io.BufferedReader;4 Importjava.io.IOException;5 ImportJava.io.InputStreamReader;6 7 Importjava.util.Observable;8 ImportJava.util.Observer;9 Ten InterfaceFruit One { A      Public voideat (); - } -  the classAppleImplementsFruit - { -  -      Public voidEat () +     { -System.out.println ("Eat Apple"); +     } A      at } -  -  - classOrangeImplementsFruit - { -      Public voidEat () in     { -System.out.println ("Eat Orange"); to     } + } - //Define Factory the classFactory * { $      Public StaticFruit getinstance (String className)Panax Notoginseng     {    -Fruit f =NULL; the         if("Apple". Equals (className)) +         { Af =NewApple ();  the         } +          -         if("Orange". Equals (className)) $         { $f =NewOrange ();  -         } -          the         returnF; -     }Wuyi } the  -  Public classFornumber Wu { -      Public Static voidMain (String args[]) About     { $Fruit f =NULL;//Defining Interface Objects -f =NewFactory (). getinstance ("Apple")); - f.eat (); -     } A}

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Common patterns in Java learning---