java - Two independent classes that communicate using an Interface -

-

is possible have 2 independent class communicate implementing interface, , if so, how?

i think using interfaces little extreme here i'm assuming simplification of larger problem

public interface someinterface {      public void givestring(string string);      public string getstring();  } 


public class class1 implements someinterface{      string string;      public class1(string string) {         this.string = string;     }      //some code      @override     public void givestring(string string) {         //do whatever string         this.string=string;      }      @override     public string getstring() {         return string;     }    } 


public class class2 implements someinterface{      string string;      public class2(string string) {         this.string = string;     }      //some code      @override     public void givestring(string string) {         //do whatever string         this.string=string;      }      @override     public string getstring() {         return string;     }  } 


public class test{      public static void main(string args[]){         //all of code inside loop         class1 cl1=new class1("teststring1");         class2 cl2=new class2("teststring2");          //note can communicate now, no interface         cl1.givestring(cl2.string);           //but can communicate using interface         givestringviainterface(cl2,cl1);     }      //any class extended someinterface use method     public static void givestringviainterface(someinterface from, someinterface to){         to.givestring(from.getstring());     }    }

Comments

Post a Comment

Popular posts from this blog

java - Jmockit String final length method mocking Issue -

-
using jmockit 1.2 jar, trying mock string's length method getting unexpected invocation exception: failed: test java.lang.illegalstateexception: missing invocation mocked type @ point; please make sure such invocations appear after declaration of suitable mock field or parameter @ stringdemo.testa$1.<init>(testa.java:17) @ stringdemo.testa.test(testa.java:13) i using testng: @test public void test() throws exception { new expectations() { @mocked("length") string astring; { astring.length(); result = 2; } }; system.out.println(a.showa("test")); } } actual class a: public class { public static int showa(string str){ int a= str.length(); return a; } } this wrong way of recording expected results. shouldn't mock , record string's length() method, record showa() instead. here solution @suppresswarnings("unused...
Read more

What is the difference between data design and data model(ERD) -

-
i have google question , find answer in day. know, data design many many table have list column,and mark pk , fk. why er-diagram have find this? data design process of designing database. main output of data design detailed logical data model of database. some people data design includes of needed logical , physical design choices , physical storage parameters needed generate design in data definition language. technically, database analysis, database analysts (dbas) trained do. while person can both data design , database analysis, these 2 different tasks. data design models data. database analysis takes model , applies 1 or more database engines (relational, hierarchical, nosql). a logical data model 1 of main outputs of data design. data model represented entity relationship diagram, or er diagram.
Read more

ios - Can NSManagedObject conform to NSCoding -

-
i need transfer single object across device. right converting nsmanagedobject dictionary , archiving , sending nsdata. upon receiving unarchiving it. transfer nsmanagedobject archiving , unarchiving instead of creating intermediate data object. @interface test : nsmanagedobject<nscoding> @property (nonatomic, retain) nsstring * title; @end @implementation test @dynamic title; - (id)initwithcoder:(nscoder *)coder { self = [super init]; if (self) { self.title = [coder decodeobjectforkey:@"title"]; //<crash } return self; } - (void)encodewithcoder:(nscoder *)coder { [coder encodeobject:self.title forkey:@"title"]; } @end nsdata *archivedobjects = [nskeyedarchiver archiveddatawithrootobject:testobj]; nsdata *objectsdata = archivedobjects; if ([objectsdata length] > 0) { nsarray *objects = [nskeyedunarchiver unarchiveobjectwithdata:objectsdata]; } the problem above code is. crashes @ self.title in initwithcoder sa...
Read more