"Java design mode" proxy mode

Several scenarios for calculating the run time of methods in a class:

Client:

1  PackageCom.tn.proxy;2 3  Public classClient {4      Public Static voidMain (string[] args) {5         /*Car car=new car ();6 Car.move ();*/7         8         //run time by inheritance calculation method9         /*cartimebyextends ctp=new cartimebyextends ();Ten Ctp.move ();*/ One          A         //calculate the method run time in a class by aggregating -         /*Car car=new car (); - cartimebyaggregate ctba=new cartimebyaggregate (car); the ctba.getcarrunningtime ();*/ -     } -}

Movable:

1  Package Com.tn.proxy; 2 3  Public Interface Movable {4     void move (); 5     void stop (); 6 }

Car:

1  PackageCom.tn.proxy;2 3 ImportJava.util.Random;4 5  Public classCarImplementsMovable {6 7 @Override8      Public voidMove () {9         /**Ten * The two-paragraph comment code in the method adds the log and calculation method execution time to the move () method.  One          */ A         /*long Start=system.currenttimemillis (); - System.out.println ("Car is start moving ..." +start);*/ -System.out.println ("Car is moving ..."); the         Try { -Thread.Sleep (NewRandom (). Nextint (1500)); -}Catch(interruptedexception e) { - e.printstacktrace (); +         } -         /*long End=system.currenttimemillis (); + System.out.println ("Car is stop moving ..." +end); A System.out.println ("Car Running Time is" + (End-start));*/ at     } -  - @Override -      Public voidStop () { -System.out.println ("Car is stopped.")); -     } in  -}

Cartimebyextends:

1  PackageCom.tn.proxy;2 /**3 * Run time of methods in the calculation class by inheritance4  * @authorXiongjiawei5  *6  */7  Public classCartimebyextendsextendscar{8 @Override9      Public voidMove () {Ten         Longstart=System.currenttimemillis (); One         Super. Move (); A         LongEnd=System.currenttimemillis (); -System.out.println ("Car Running time is:" + (end-start)); -     } the}

Cartimebyaggregate:

1  PackageCom.tn.proxy;2 /**3 * Run time by aggregation calculation method4  * @authorXiongjiawei5  *6  */7  Public classCartimebyaggregate {8 car car;9 Ten      Publiccartimebyaggregate (car car) { One          This. car=car; A     } -      -      Public voidGetcarrunningtime () { the         Longstart=System.currenttimemillis (); - Car.move (); -         LongEnd=System.currenttimemillis (); -System.out.println ("Car Running time is:" + (end-start)); +     } -}

The above functions are implemented through static proxies:

Client:

1  PackageCom.tn.proxy;2 3  Public classClient {4      Public Static voidMain (string[] args) {5Car car=NewCar ();6Cartimeproxy ctp=Newcartimeproxy (car);7Carlogproxy clp=NewCarlogproxy (CTP);8 Clp.move ();9         /*running result: Car is packed by time, time is packed in journalTen Logging ... One Start time:1494730233358 A Car is moving ... - End time:1494730234835 - logged. the          */ -System.out.println ("--------------------------------------"); -Movable clp2=Newcarlogproxy (car); -Movable ctp2=NewCartimeproxy (CLP2); + Ctp2.move (); -         /* + Run Result: Time packing log, log packing car A Start time:1494730473747 at Logging ... - Car is moving ... - logged. - End time:1494730474995 -         */ -     } in}

Movable:

1  Package Com.tn.proxy; 2 3  Public Interface Movable {4     void move (); 5 }

Car:

1  PackageCom.tn.proxy;2 3 ImportJava.util.Random;4 5  Public classCarImplementsMovable {6 7 @Override8      Public voidMove () {9System.out.println ("Car is moving ...");Ten         Try { OneThread.Sleep (NewRandom (). Nextint (1500)); A}Catch(interruptedexception e) { - e.printstacktrace (); -         } the     } -}

Cartimeproxy:

1  PackageCom.tn.proxy;2 3  Public classCartimeproxyImplementsmovable{4 movable movable;5      Publiccartimeproxy (movable movable) {6          This. movable=movable;7     }8 @Override9      Public voidMove () {Ten         Longstart=System.currenttimemillis (); OneSystem.out.println ("Start time:" +start); A Movable.move (); -         LongEnd=System.currenttimemillis (); -System.out.println ("End time:" +end); the     } -}

Carlogproxy:

1  PackageCom.tn.proxy;2 3  Public classCarlogproxyImplementsMovable {4 movable movable;5     6      Publiccarlogproxy (movable movable) {7          This. movable=movable;8     }9     Ten @Override One      Public voidMove () { ASystem.out.println ("Logging ..."); - Movable.move (); -System.out.println ("logged.")); the     } -  -}

"Java design mode" proxy mode