interface

问题 I have this interface: public interface FakeTemplate { @CustomAnnotation void foo() { } } And this implementation of the interface: @Component public FakeImpl implements FakeTemplate { @Override public void foo() { //Do Stuff } } And this aspect: @Aspect @Component public class CustomAspect { @Before(value = "@annotation(com.fake.CustomAnnotation)") public void doStuffBefore(JoinPoint joinPoint} { } } I'm using spring with AspectJ enabled using: @EnableAspectJAutoProxy(proxyTargetClass = true

问题 Well, I'm programming Conway's game of life in python, and although my program works, the way the user gives the initial points is writing the coordinates of each point. I want an interface that shows the points with integer coordinates of the cartesian plane, let me select some with the mouse and finally give back the points I selected as tuples(or lists, doesn't matter). Should I download some kind of program or there is a module that has such functionality? I would also like to ask for

问题 I have a List view of ringtones with a play image view in each row for each ringtone .. This is the view of it.. Now obviously when user clicks on a play button it should switch into pause button.. I have implemented this and it's all good so far .. Now I have a problem : I don't know how to track the currently playing row,I mean if user wants to play a song from another row, first I have to change currently pause toggle to play, then play the new one. Can you help me with this please !?

问题 I have a cms with a page that contains forms. I want in the cms to have a dropdown with different class names that all implement a validation interface. My form handlers contain a process method which I want to validate against the selected validation class. So I have this interface: public interface IEligibilityValidation { bool IsValid(); } and for example this class public class ComplexEligibilityValidation : IEligibilityValidation { public bool IsValid() { return true; /* complex logic

问题 I have read the docs, but the docs seem vague to me and I'm having a hard time understanding what it is exactly and what it's used for. Two question regarding this: What exactly is the AttributeSet interface? What is the purpose of instances of classes implementing this interface? Also, the Style interface is a subinterface of the AttributeSet interface. What exactly is this interface? What is the purpose of instances of classes implementing it? 回答1: An AttributeSet implementation is supposed

问题 Say I have the following interface and class This has a association dependency on SomeObject like so Does the interface, IDoSomething, have a dependency on SomeClass? Should I show this in UML? Clearly the interface does have a dependency but this looks like noise to me: I was thinking that you could infer the interfaces dependency from DoSomethingImpl's dependencies, but this wouldn't work if it implemented multiple interfaces. If the interface implemented another interface then I would

问题 I have the impression that it is possible to instantiate an interface: interface TestA { String toString(); } public class Test { public static void main(String[] args) { System.out.println(new TestA() { public String toString() { return "test"; } }); } } This prints "test" . Why? The class doesn't implement the interface. Also it creates an instance of it using new TestA() but I read interfaces cannot be instantiated. Can someone please explain why it prints successfully ? 回答1: What is going

问题 I have a around 50 databases that have 150 tables each and working on a search mechanism that would allow to query the tables that have specific columns. Most database structures are similar so idea was to generate EF entities and put interfaces behind the entities generated if tables that they are being generated from have specific columns, so that I could later query then on that column. After doing this I ran into unexpected problem on some tables column I am trying to map is Long while on

问题 I have multiple fragments in one activity that should be able to pass data inbetween them. I have used tutorials to implement callbacks. My MainActivity is the outer class in which my fragment classes are. Furthermore I have a FragmentPagerAdapter that handles the fragment transitions. Well the thing is, Eclipse wont let me implement my callback interface, that is included in one of the Fragments, for my MainActivity outer class. This is the structure of my code: public class MainActivity

问题 I want to create a symlink in RHEL 5 using Java. In java6 createSymbolicLink have only two parameters. But in case of Java7 FileAttribute has been included along with the parameters, ie a total of three parameters. public static Path createSymbolicLink(Path link, Path target, FileAttribute... attrs) throws IOException Creates a symbolic link to a target (optional operation). The target parameter is the target of the link. It may be an absolute or relative path and may not exist. When the