anonymous-class

问题 I am trying to write code for the following question : WAP to get empno ,DOB and salary of few employees. Write two anonymous inner class , one that implements an interface to sort the employees as per their DOB and another anonymous inner class that extends a class to sort the employees as per their salary . My code is : //required import statements public class OuterClass { private int empno; private String DOB; private int salary; public OuterClass() { // TODO Auto-generated constructor

问题 NOTE: I am aware that this is dangerously close to many other questions. I haven't seen any, however, that do not pertain specifically to Android's OnClickListener interface. I am asking in a general sense. I understand the difference between instantiating an interface via an anonymous class... a la: private final Runnable runnable = new Runnable() { @Override public void run() { draw(); } }; ... and extending the interface. public class ClassyClass implements Runnable { ... //do other cool

问题 I'm trying to accommodate to Spring JDBC, but what bugs me is using these anonymous classes, where we cannot pass any local variables unless they are final which might be easy to arrange, but what about if I need to loop an array or collection ? I cannot declare "FedModel fm" to be final as it gets reinitialized in the loop, but I need to call the execute method 100 times. This is concrete scenario where I have the problem, cause I don't know any other way how to insert BLOB into a database.

问题 I really liked Sulthan's answer (in Anonymous class in swift) which describes building an object which conforms to a protocol but whose class is hidden inside a closure. This would be nice for building singletons and not polluting the name-space with classes like Recorder1, Recorder2... However, when I try to do anything useful with it, I fail because the closure will not close over the outer class' instance members inside the inner class. protocol EventListener { func handleEvent(event: Int)

问题 As I understand it, any variables used within an inner anonymous class (but declared outside of it) are actually passed a copy of their values. There is also a requirement that these outer variables be declared as final, which obviously means that these variables are not meant to be modified. But is there any kind of work-around to this? Can my anonymous inner class actually modify some variable or object, which I could then use later on in my code (outside of the anonymous class)? Or would

问题 I have a class under test which contains a method which has an inner anonymous class. One of the methods in the anonymous class calls a method from the class under test, but Mockito doesn't seem to realize this. public class ClassUnderTest { Dependency dependency; public ClassUnderTest(Dependency d) { dependency = d; } public void method() { dependency.returnsObservable().observeOn(AndroidSchedulers.mainThread()) .subscribeOn(Schedulers.io()).subscribe(new Observer<SupportClass> { /* Other

问题 I just got some bad feedback on a uni project and need some impartial clarification; Can anyone explain when I should use (anonymous) inner listener classes vs components that listen to themselves? (a vs b) a) public class myButton extends JButton { public myButton() { addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // handling code... } }); } } b) public class myButton extends JButton implements ActionListener { public myButton() { addActionListener(this

问题 I have difficulty in using a generated bytecode class which is loaded by Unsafe.defineAnonymousClass() . I am wondering how to use an object of anonymous class to initiliaze another class (or anonymous class). Take an example class Callee below for example, its constructor accepts Callee2 as parameter. Class Callee{ Callee2 _call2; public Callee(Callee2 callee2){ ... } } During runtime, I generated new classes for both Callee2 and Callee, and both new classes are loaded by Unsafe

问题 Java lets you declare new fields inside anonymous classes, but I can't figure out how to access them from outside, even setting them to public doesn't let me. class A { public static void main(String[] args) { Object o = new Object() { public int x = 0; { System.out.println("x: " + x++); System.out.println("x: " + x++); } }; System.out.println(o.x); } } I get this compiler error: $ javac A.java && java A A.java:10: cannot find symbol symbol : variable x location: class java.lang.Object System

问题 If the anonymous class is defined as the type of an interface then the anonymous class implements the interface, however if it's defined as the type of another class (as shown below) it doesn't seem to extend the class (as I was told it did). public class AnonymousClassTest { // nested class private class NestedClass { String string = "Hello from nested class."; } // entry point public static void main (String args[]){ AnonymousClassTest act = new AnonymousClassTest(); act.performTest(); } //