Interface Expected Here Error Java

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Interface Expected Here Android Studio

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Android Interface Expected Here

you, helping each other. Join them; it only takes a minute: Sign up implementing a interface to a class: class to interface to interface up vote 1 down vote favorite hi im a beginner in this and no interface expected here android studio im trying to implement a class to a interface. The interface extends another interface. Im making a class with methods to run through a list and interfer with it, the two interfaces are apart of this. The two interfaces are in each its separate file, but everything is in the same package, hope this is right. Im getting the following errors: From the class doublelinkedlist: interface expected here From the interface A: doublelinkedlist.A is already interface expected here error android defined in doublelinkedlist, interface expected here From interface B: doublelinkedlist.B is already defined in doublelinkedlist Code class: package doublelinkedlist; import java.util.*; public class Doublelinkedlist implements A { Code interface A: (in separate file called A.java ) package doublelinkedlist; import java.util.Iterator; public class A { // am I supposed to have a class here? or just have the interface? public interface A extends B { Code interface B: (in separate file called B.java ) package doublelinkedlist; public class B { public interface B extends Iterable { There is no code for the two interfaces in the class, so I dont understand why i get an error saying its already defined. Anybody got a clue? java interface share|improve this question edited Oct 15 '13 at 14:54 Cyrille Ka 10.9k22549 asked Oct 15 '13 at 14:50 comodeque 2026 3 An interface cannot extend from a class, just from another interfaces. A class cannot extend from an interface, just from one single non-final class. A class can implement one or several interfaces. –Luiggi Mendoza Oct 15 '13 at 14:53 2 @JeroenVannevel you can declare inner interfaces/classes inside a class, there's nothing wrong about it. –Luiggi Mendoza Oct 15 '13 at 14:53 add a comment| 3 Answers 3 active oldest votes up vote 2 down vote accepted interface expected here indicates that the compiler is expecting an

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No Interface Expected Here Intellij

Forum: Beginning Java interface expected here Brandi Love Ranch no interface expected here serializable Hand Posts: 133 posted 9 years ago I am getting this error: File: C:\Documents and

Java Implements

Settings\Marist User\My Documents\Brandi\pkAlgs\PrimHeap.java [line: 3] Error: interface expected here for the following code: import java.util.*; public class PrimHeap implements PriorityQueue { private Association [ ] http://stackoverflow.com/questions/19384298/implementing-a-interface-to-a-class-class-to-interface-to-interface buffer; private int [ ] loc; //**********************************/ private int last; private final int DEFAULT_SIZE = 10; public PrimHeap( ) { buffer = new Association[DEFAULT_SIZE]; loc = new int[DEFAULT_SIZE]; //*********************************/ last = 1; } public PrimHeap(Association [ ] theArray) { //Heapify constructor //pre-condition: size == capacity of theArray //post-condition: buffer is heap https://coderanch.com/t/405199/java/java/interface-expected ordered //*************************************** buffer = new Association[theArray.length + 1]; loc = new int[theArray.length + 1]; for (int i = 1; i <= theArray.length; i++) loc[i] = i; //****************************************** last = theArray.length + 1; for (int i = 0; i < theArray.length; i++) buffer[i+1] = theArray[i]; for (int j = (last - 1)/2; j > 0; j--) { siftDown(j); } } private void resize(int newAmt) { Association [ ] newBuffer = new Association[newAmt]; //******************************************** int [ ] newLoc = new int[newAmt]; for (int i = 1; i < last; i++) { newBuffer[i] = buffer[i]; newLoc[i] = loc[i]; } //**********************************************/ buffer = newBuffer; loc = newLoc; //******************************/ } public void add(Association obj) { //precondition: none //post-condition: if last = capacity, the buffer size is increased // obj is added to the heap, and heap ordering is retained if (last == buffer.length) resize(buffer.length + DEFAULT_SIZE); buffer[last] = obj; loc[buffer[last].getKey()] = last; //****************************/ sif

Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Beginning Java error: no interface expected here Peter Simon Greenhorn Posts: 14 https://coderanch.com/t/392710/java/java/error-interface-expected posted 13 years ago Hi, I have two classes which extend interfaces. One extends Serializable, the other javax.ejb.EntityBean I do import the right packages. java.io.Serializable and javax.ejb.* Compiler complains: no interface expected http://overlap2d.com/forums/topic/error-no-interface-expected-here-in-platformcomponent-java/ here. I guess the solution is pretty straightforward, but I don't see what I'm doing wrong. thanks for setting this straight. Barry Gaunt Ranch Hand Posts: 7729 posted 13 years ago interface expected Sorry to be a pedant but do you really mean extends Serializable? -Barry Ask a Meaningful Question and HowToAskQuestionsOnJavaRanch Getting someone to think and try something out is much more useful than just telling them the answer. Volodymyr Shram Ranch Hand Posts: 47 posted 13 years ago Originally posted by Peter Simon: Hi, I have two classes which extend interfaces. One extends Serializable, the interface expected here other javax.ejb.EntityBean I do import the right packages. java.io.Serializable and javax.ejb.* Compiler complains: no interface expected here. I guess the solution is pretty straightforward, but I don't see what I'm doing wrong. thanks for setting this straight. Yeah, Barry Gaunt is right, you have to use implement instead of extends interfaces in your case: public abstract class YourBean implements EntityBean or extends inteface for local/remote interface: public interface GateLocal extends javax.ejb.EJBLocalObject and implement your serializable object: public class YourModel implements Serializable ... Peter Simon Greenhorn Posts: 14 posted 13 years ago thank you for the replys. As I thought it was pretty straightforward. Have to get used interpreting the errormessages I guess. Barry Gaunt Ranch Hand Posts: 7729 posted 13 years ago Volodymyr got in before me ( while I had to go for my books ) You must implement EntityBean. Damm... I'll just have to learn to type with four fingers... [ October 25, 2002: Message edited by: Barry Gaunt ] Ask a Meaningful Question and HowToAskQuestionsOnJavaRanch Getting someone to think and try something out is much more useful than just telling them the answer. Volodymyr

here in PlatformComponent.java This topic contains 2 replies, has 2 voices, and was last updated by bangive 11 months ago. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts November 16, 2015 at 10:16 am #3443 bangive I followed tutorial video. In the video the code is: public class PlatformComponent extends Component { ... } 123456789 public class PlatformComponent extends Component {...} The video run ok but when i run it show output error: Error no interface expected here public class PlatformComponent extends Component { 12345 Error no interface expected here public class PlatformComponent extends Component { I need to change extends to implements to make it works. Please explain why. This topic was modified 11 months, 1 week ago by bangive. This topic was modified 11 months, 1 week ago by bangive. November 16, 2015 at 4:17 pm #3455 azakhary "Component" is part of Ashley. When I was making the video Component was an abstract class. Later they changed it to interface. So now it has to be "implements" now. You can ask them why they did it: https://github.com/libgdx/ashley November 17, 2015 at 1:21 am #3459 bangive Thank you for clarifying. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Search for: Close Login Forgot your password? Username or E-mail* Password* Remember me © 2016 UnderwaterApps, LLC