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string - 多个 StringProperty 的 Javafx 串联

转载 作者:行者123 更新时间:2023-12-04 22:31:03 25 4
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有没有一种简单的方法来绑定(bind) StringProperty 对象的串联?

这是我想做的事情:

TextField t1 = new TextField();
TextField t2 = new TextField();

StringProperty s1 = new SimpleStringProperty();
Stringproperty s2 = new SimpleStringProperty();
Stringproperty s3 = new SimpleStringProperty();

s1.bind( t1.textProperty() ); // Binds the text of t1
s2.bind( t2.textProperty() ); // Binds the text of t2

// What I want to do, theoretically :
s3.bind( s1.getValue() + " <some Text> " + s2.getValue() );

我怎样才能做到这一点?

最佳答案

你可以做:

s3.bind(Bindings.concat(s1, "  <some Text>  ", s2));

这是一个完整的例子:
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;


public class BindingsConcatTest extends Application {

@Override
public void start(Stage primaryStage) {
TextField tf1 = new TextField();
TextField tf2 = new TextField();
Label label = new Label();

label.textProperty().bind(Bindings.concat(tf1.textProperty(), " : ", tf2.textProperty()));

VBox root = new VBox(5, tf1, tf2, label);
Scene scene = new Scene(root, 250, 150);
primaryStage.setScene(scene);
primaryStage.show();
}

public static void main(String[] args) {
launch(args);
}

}

关于string - 多个 StringProperty 的 Javafx 串联,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25325209/

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