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POJava: reusable encapsulation with interface, abstract class or inner classes?
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Id
2734903
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AcceptedAnswerId
2735187
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6
ClosedDate
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5
CommunityOwnedDate
2010-04-30T20:50:53.980
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2010-04-29T05:09:23.050
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2010-04-30T20:50:53.980
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2010-04-30T20:50:53.980
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164148
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1
ViewCount
1630
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text
Body
I try to encapsulate. Exeption from interface, static inner class working, non-static inner class not working, cannot understand terminology: nested classes, inner classes, nested interfaces, interface-abstract-class -- sounds too Repetitive! BAD! --- Exception 'illegal type' from interface apparently because values being constants(?!) <pre><code> static interface userInfo { File startingFile=new File("."); String startingPath="dummy"; try{ startingPath=startingFile.getCanonicalPath(); }catch(Exception e){e.printStackTrace();} } </code></pre> MANY WAYS TO DO IT: Interface, static inner class image VS non-static innner class image <pre><code>import java.io.*; import java.util.*; public class listTest{ public interface hello{String word="hello word from Interface!";} public static class staticTest{ staticTest(){} private String hejo="hello hallo from Static class with image"; public void printHallooo(){System.out.println(hejo);} } public class nonStatic{ nonStatic(){} public void printNonStatic(){System.out.println("Inside non-static class with an image!");} } public static class staticMethodtest{ private static String test="if you see mee, you printed static-class-static-field!"; } public static void main(String[] args){ //INTERFACE TEST System.out.println(hello.word); //INNNER CLASS STATIC TEST staticTest h=new staticTest(); h.printHallooo(); //INNER CLASS NON-STATIC TEST nonStatic ns=(new listTest()).new nonStatic(); ns.printNonStatic(); //INNER CLASS STATIC-CLASS STATIC FIELD TEST System.out.println(staticMethodtest.test); } } </code></pre> OUTPUT <pre><code>hello word from Interface! hello hallo from Static class with image Inside non-static class with an image! if you see mee, you printed static-class-static-field! </code></pre> Related <ul> <li><a href="http://mindprod.com/jgloss/nestedclasses.html" rel="nofollow noreferrer">Nesting classes</a></li> <li>inner classes?</li> <li>interfacses</li> </ul>
Tags
<java><interface><abstract-class><nested-class><reusability>
Title
Java: reusable encapsulation with interface, abstract class or inner classes?
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