overriding

问题 I have this test code example: public class Test { private static class Test3 { private void print1() { System.out.println("1"); } } private static class Test4 extends Test3 { private void print1() { System.out.println("2"); } } public static void main(String[] args) { System.out.println("Overriden call to private method ----------------"); OuterTest.Test1 test1 = new OuterTest.Test1(); OuterTest.Test2 test2 = new OuterTest.Test2(); OuterTest.Test1 test12 = new OuterTest.Test2(); test1

问题 I am having a hard time understanding how to get the following code structure to work. In Scala I have a class MyClass which inherits from SomeClass I added a var member variable in this case called mutableArray and it is being updated in the overridden method overridingSomeClassMethod and is called when I create a new instance of the MyClass a number of times right away. But in main when I try and get the updated mutableArray variable it prints out the instantiated var as if it is immutable

问题 I have a model for one of my database tables. I want to override the column name for that particular table. How would I achieve it. For example, let my table be called DUMMY and it has one column called col_a col_a 20 34 42 23 12 I would be doing a @dummy.col_a . Now this method should return me 0 for numbers ending with 0 and for everything else, it should return the original value. I could do that by defining a new method, but I want to override the column name itself. Please help. 回答1: You

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . I need to add an Event for all my Textboxes in a C# winforms app. How can I override for example, the Enter event so all textboxes will have by default this event ? Thanks in advance 回答1: You can inherit YourTextBox from TextBox and override OnEnter method to provide default

问题 ASP MVC RAZOR I try to override the bootstrap default style. I declared my stylesheet as below: /*bootstrap and default style*/ @Styles.Render("~/Content/css"); /*My CSS*/ <link href="@Url.Content("~/css/main.css")" rel="stylesheet" type="text/css" /> @RenderSection("Styles", required: false) In the bundleconfig:(only the default styles) bundles.Add(new StyleBundle("~/Content/css").Include( "~/Content/bootstrap.css", "~/Content/site.css" )); But as you can see below my style is overriden by

问题 I have noticed weird conflict between twitter bootstrap (2.2.1) and ad-gallery in Internet Explorer. Turns out this lines in bootstrap.min.css causing a problem and images don't show up: img{max-width:100%;width:auto\9;height:auto;vertical-align:middle;border:0;-ms-interpolation-mode:bicubic;} when i remove these two everything works normally: width:auto\9;height:auto; But instead of removing those i am trying to override those properties but none of this worked so far: .ad-gallery img{width

问题 In a Java project I am coding I have ended up using methods that are overridden in constructors. Something like: class SuperClass { SuperClass() { intialise(); } protected void initialise() { //Do some stuff common to all subclasses methodA(); methodB(); } protected abstract void methodA(); protected abstract void methodB(); } class SubClass1() { SubClass() { super(); } protected void methodA() { //Do something } protected void methodB() { //Do something } } class SubClass2() { SubClass() {

问题 Problem outline I'm generifying the better part of my current project's base and I had an idea that I decided to test regarding overriding an abstract method. Here are my test classes in Java: public abstract class Base { public abstract <T extends Base> T test(); } First implementation: public class Inheritor extends Base { @Override public Inheritor test() { return null; } } Second implementation: public class Inheritor2 extends Base { @Override public <T extends Base> T test() { return

问题 I am reading "Thinking in Java" and have a doubt. In the chapter "reusing classes", section "final and private", it says that a private method cannot be overridden. However, I tried it on the machine. It actually could be overridden. Here is the code: class Amphibian { private void print() { System.out.println("in Amphibian"); } } public class Frog extends Amphibian { public void print() { System.out.println("in Frog"); } public static void main(String[] args) { Frog f = new Frog(); f.print()

问题 public <S extends T> List<S> save(Iterable<S> entities) { //... } If I use following method to override @Override public List<MyType> save(Iterable<MyType> structures) { List<MyType> result = new ArrayList<>(); //... return result; } I get following error: method does not override or implement a method from a supertype name clash: save(Iterable<MyType>) in MyTypeRepositoryImpl and <S>save(Iterable<S>) in SimpleJpaRepository have the same erasure, yet neither overrides the other where S,T are