implements

Implement a ImageView to a SurfaceView

由 前提是你 提交于 2019-12-08 09:35:41
问题 I have one small question... Is it possible to implement a ImageView inside a SurfaceView , or to create a ImageView inside the SurfaceView And if so could someone point me in the right direction on how to do it. 回答1: I did this in code with a TextView, but you could just change text view with ImageView. My TextView is a small bar across the top, hence the changing parameters. params = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT

I want to add my own methods to a few Dart Classes

由 烂漫一生 提交于 2019-12-08 02:06:12
问题 My attempt to simply 'Extend' the Map class fails because List is an interface and cannot be extended but must be implemented. The goal was simply to add a few methods on top of some existing class such as: List.add_unique(item) where I only want to append if the item does not already exist. This can be done nicely by and-ing the append !=null logic with List.indexOf(item) != -1 (where -1 is notFound). This would be a good and easy to understand example? But, how to accomplish this in the

Java: Issue combining Generics, Inner class, and “implements”

由 别来无恙 提交于 2019-12-07 13:24:52
问题 I am having an issue combining generics, implements , and inner classes. I am creating a LinkedBinaryHeap class which contains an inner class. This inner class is the generic HeapNode which extends the generic Node class I created; it just adds a variable and methods for a key/priority. In LinkedBinaryHeap I create a generic LinkedList to store HeapNode s. I am assuming the generic data being stored extends Comparable class. Here is a layout of what stores what: BinaryHeap->LinkedList(Nodes)-

Java overriding two interfaces, clash of method names

由 旧巷老猫 提交于 2019-12-07 01:07:39
问题 I am implementing the Map<V,K> and the Collection<V> interface in one class, but the remove(Object) method occurs in both interfaces, therfore eclipse shows me some errors. The return types are different, one returns boolean and the other V but that doesn't seem to matter. Is there some way of telling java/eclipse which method is actually being overridden? EDIT: I have got an interface that all values must implement, it supplies the value with a getKey() method, making it possible to write an

I want to add my own methods to a few Dart Classes

由 醉酒当歌 提交于 2019-12-06 05:09:34
My attempt to simply 'Extend' the Map class fails because List is an interface and cannot be extended but must be implemented. The goal was simply to add a few methods on top of some existing class such as: List.add_unique(item) where I only want to append if the item does not already exist. This can be done nicely by and-ing the append !=null logic with List.indexOf(item) != -1 (where -1 is notFound). This would be a good and easy to understand example? But, how to accomplish this in the shortest, least overall overhead sort of way? I think I would be OK with loose typing - at least to start

Java: Issue combining Generics, Inner class, and “implements”

由 时光毁灭记忆、已成空白 提交于 2019-12-06 00:02:21
I am having an issue combining generics, implements , and inner classes. I am creating a LinkedBinaryHeap class which contains an inner class. This inner class is the generic HeapNode which extends the generic Node class I created; it just adds a variable and methods for a key/priority. In LinkedBinaryHeap I create a generic LinkedList to store HeapNode s. I am assuming the generic data being stored extends Comparable class. Here is a layout of what stores what: BinaryHeap->LinkedList(Nodes)->HeapNode(extends Node)->DATA,KEY My issue is that when declaring the LinkedList : LinkedList<HeapNode>

Kotlin: How can I let Android Studio implement interface's function at bottom of class

由 …衆ロ難τιáo~ 提交于 2019-12-05 20:24:27
问题 When implementing an interface in a Kotlin class: When I press Alt+Enter on ClassName I can have the IDE add an interface's functions via 'implement members'. It's kind of annoying that in Kotlin these functions are added at the top of the class. I would like them to be added at the end of the class (just like in Java). How can I do that? 回答1: Right now there is no possibility to control the order of the methods. Please watch the corresponding issue to get notified when this is implemented.

Java overriding two interfaces, clash of method names

由 不羁的心 提交于 2019-12-05 05:32:49
I am implementing the Map<V,K> and the Collection<V> interface in one class, but the remove(Object) method occurs in both interfaces, therfore eclipse shows me some errors. The return types are different, one returns boolean and the other V but that doesn't seem to matter. Is there some way of telling java/eclipse which method is actually being overridden? EDIT: I have got an interface that all values must implement, it supplies the value with a getKey() method, making it possible to write an add function for the map. But there seems to be no way to let this one class look as a map and a

implementing Comparable interface from abstract class with concrete subclasses

由 白昼怎懂夜的黑 提交于 2019-12-05 02:10:20
问题 package geometricobject; public abstract class GeometricObject implements Comparable { private String color = "white"; private boolean filled; private java.util.Date dateCreated; protected GeometricObject(){ dateCreated = new java.util.Date(); } protected GeometricObject(String color, boolean filled){ dateCreated = new java.util.Date(); this.color = color; this.filled = filled; } public String getColor(){ return color; } public void setColor(String color){ this.color = color; } public boolean

java action listener: implements vs anonymous class

由 痴心易碎 提交于 2019-12-05 00:34:26
问题 I am trying to teach myself Java and had a question that I wasn't able to answer so far. In some of my reading online I have found two ways of using action listener that seem to do the same thing. But I am trying to figure out what is the advantage/disadvantage of one over the other. Is it better to use anonymous class like this: public MyClass() { ... myButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { //doSomething } }); ... } or is it best to
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