setter

问题 I am familiar with Java, but just starting to learn JavaFX, and specifically learn about JavaFX properties. I understand the basic design pattern as shown in the following example from Oracle: package propertydemo; import javafx.beans.property.DoubleProperty; import javafx.beans.property.SimpleDoubleProperty; class Bill { // Define a variable to store the property private DoubleProperty amountDue = new SimpleDoubleProperty(); // Define a getter for the property's value public final double

问题 Several questions about accessor methods in C++ have been asked on SO, but none was able satisfy my curiosity on the issue. I try to avoid accessors whenever possible, because, like Stroustrup and other famous programmers, I consider a class with many of them a sign of bad OO. In C++, I can in most cases add more responsibility to a class or use the friend keyword to avoid them. Yet in some cases, you really need access to specific class members. There are several possibilities: 1. Don't use

问题 I have a WPF application where I'm using dependency properties in codebehind which I want to set via XAML declarations. e.g. <l:SelectControl StateType="A" Text="Hello"/> So in this example I have a UserControl called SelectControl , which has a property called StateType which manipulate some other properties in it's setter. To help illustrate the problem, I've put another property called Text in the example, read on and I'll explain further. Codebehind excerpt... public static readonly

问题 This question already has answers here : Why use getters and setters/accessors? (38 answers) Closed 4 years ago . Allen Holub wrote the following, You can't have a program without some coupling. Nonetheless, you can minimize coupling considerably by slavishly following OO (object-oriented) precepts (the most important is that the implementation of an object should be completely hidden from the objects that use it). For example, an object's instance variables (member fields that aren't

问题 This question already has answers here : Why use getters and setters/accessors? (38 answers) Closed 4 years ago . Allen Holub wrote the following, You can't have a program without some coupling. Nonetheless, you can minimize coupling considerably by slavishly following OO (object-oriented) precepts (the most important is that the implementation of an object should be completely hidden from the objects that use it). For example, an object's instance variables (member fields that aren't

问题 so far I have seen two approaches of setting a variable's value in Java. Sometimes a constructor with arguments is used, others setter methods are used to set the value of each variable. I know that a constructor initialises an instance variable inside a class once a class is instantiated using the "new" Keyword. But when do we use constructors and when do we use setters? 回答1: You should use the constructor approach, when you want to create a new instance of the object, with the values

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Why use getters and setters? I have read books on Java , saying that it is good to create setters and getters for variables such as x and y . For example: public int getX(){ return x; } public void setX(int x){ this.x = x; } But what is the difference from that and ...(shape.x)... // basically getX() and shape.x = 90; // basically setX() If setters and getters are better, could you explain to me what practical

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Why use getters and setters? I have read books on Java , saying that it is good to create setters and getters for variables such as x and y . For example: public int getX(){ return x; } public void setX(int x){ this.x = x; } But what is the difference from that and ...(shape.x)... // basically getX() and shape.x = 90; // basically setX() If setters and getters are better, could you explain to me what practical

问题 I have problem with creating xaml control. I'm writing new project in VS 2015 in universal app. I want create grid. In this grid I want to have a button. In model I specifi the column (Level) and Row. this is my code: <ItemsControl Grid.Row="1" ItemsSource="{Binding Path=TechnologyList}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Grid> <Grid.RowDefinitions> <RowDefinition Height="10*"/> <RowDefinition Height="10*"/> <RowDefinition Height="10*"/> <RowDefinition Height="10*"/>

问题 I have problem with creating xaml control. I'm writing new project in VS 2015 in universal app. I want create grid. In this grid I want to have a button. In model I specifi the column (Level) and Row. this is my code: <ItemsControl Grid.Row="1" ItemsSource="{Binding Path=TechnologyList}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Grid> <Grid.RowDefinitions> <RowDefinition Height="10*"/> <RowDefinition Height="10*"/> <RowDefinition Height="10*"/> <RowDefinition Height="10*"/>