setter

问题 This question already has answers here : Set and Get Methods in java? (15 answers) Closed 4 years ago . I am unsure how to create a setter method in java. Everything that I found on the internet either shows how to "generate" one in eclipse or doesn't include what I am looking for. I am looking for a simple answer in plain terms, if that is possible. I understand what a setter-method does, but am unsure about the syntax and specific code. Thank you for your time. 回答1: A setter is a method

问题 I have the following XAML: <ListBox.ItemsPanel> <ItemsPanelTemplate> <Grid> <Grid.RowDefinitions> ... </Grid.RowDefinitions> <Grid.ColumnDefinitions> ... </Grid.ColumnDefinitions> </Grid> </ItemsPanelTemplate> </ListBox.ItemsPanel> ... <ListBox.ItemContainerStyle> <Style TargetType="ListBoxItem"> <Setter Property="Grid.Row" Value="{Binding Row, Mode=OneWay}" /> <Setter Property="Grid.Column" Value="{Binding Column, Mode=OneWay}" /> </Style> </ListBox.ItemContainerStyle> ... When the page

问题 I am trying to access a form which is not static from another class which is also not static. I'd like to use a member in the class.... Public Class MainForm public void setConsoleText(String Text){ jTextArea1.append(Text); } I need to know a way to reference this setter from my class "Log" which is basically where data goes to be parsed and logged. I want it to be like this: private void consoleOut(String data) { System.out.println(data); MainForm.setConsoleText("data"); } I cannot access

问题 I have a integer variable, for example, timeSignature, declared it in .h file, and synthesized a pair of setter/getter methods: in .h: @interface Metronome : NSObject { int timeSignature; } @property (nonatomic) int timeSignature; in .m: @synthesize timeSignature; I wish to override the setter method: when user set a new value to it, it does something else as well as changing to new value: - (void) setTimeSignature:(int)timeSignature { self.timeSignature = timeSignature; //hides instance

问题 I'm trying to create a getter and setter for a field in TypeScript. searchFilter: string; get searchFilter(): string { return this.searchFilter; } set searchFilter(value: string) { this.searchFilter = value; } This gives error: Duplicate identifier 'searchFilter'. I'm using TypeScript in an Angular project. @angular/cdk: 6.0.1 @angular/cli: 1.7.4 typescript: 2.5.3 回答1: You can't have property with the same name you used for getter or setter. So create another private property( _searchFilter )

问题 I need to implement a class in java where its field needs to be set only once, but it's value is not known at field declaration. To do so I have: public class MyClass { private String field1 = null; public void setField1(String value) { if (field1 == null) { field1 = value; } } } However what I have do not prevent users to call setField1 more than once. That may lead to confusion where a user is trying to set it (without knowing it has been set somewhere else) and then the user will get

问题 I've had a good read of the PHP specs on overloading, and most of the examples appear to be intended to simply allow defining of custom fields (similar to stdClass). But what about the private fields defined in my class? How should these be retrieved/assigned? I could do a switch on possible values and act on certain values: class A { private $name; private $age; public function __get( $var ) { switch ( $var ) { case 'name': return $this->name; break; case 'age': return $this->age+10; // just

问题 I am a bit confused about how to use constructor and setter in Java, please see the sample code below: public class Name { private String name; public void setName(String name){ this.name=name; } public String getName(){ return name; } } public static void main(String[] args) { Name a=new Name(); a.setName("123"); System.out.println(a.getName()); } It prints out 123, it is using setter method without constructor, I also wrote the other code below: public class Name { private String name;

问题 I worked with C# for a good six months as part of my internship. Something I learned over that internship is the beauty of C# properties, AKA setters and getters. In the beginning of the internship, properties was also a source of my confusion, but using it for awhile, I fell in love with it. Coming back to Java for classes, I had to bid goodbye to it. Until.. I started this simple assignment: My methods and constructors: private double xCoor; private double yCoor; public Point(double xCoor,

问题 Unexpected Return Value from Method: Expecting Symbol I have the following Ticket class: class Ticket VALID_STATES = %i[open closed invalid wontfix] attr_reader :status def status= new_state new_state = new_state.to_sym @status = new_state end end When passed a String rather than a Symbol, the setter method unexpectedly returns a String, even though the correct value is being returned by the getter method. For example: t = Ticket.new t.status = 'closed' #=> "closed" t.status #=> :closed It