如何在 JavaFX 中创建微调器?
微调器是一种 UI 元素,它显示一个数字,并带有向上和向下箭头。可以使用这些箭头增大或减小微调器的值。可通过实例化 javafx.scene.control.Spinner 类来创建一个微调器。
实例
以下示例演示如何创建 **微调器**。
import javafx.application.Application; import javafx.geometry.Insets; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Label; import javafx.scene.control.Spinner; import javafx.scene.layout.HBox; import javafx.scene.layout.VBox; import javafx.scene.paint.Color; import javafx.scene.text.Font; import javafx.scene.text.FontPosture; import javafx.scene.text.FontWeight; import javafx.stage.Stage; public class SpinnerExample extends Application { public void start(Stage stage) { //Setting the label Label label = new Label("Select Date:"); Font font = Font.font("verdana", FontWeight.BOLD, FontPosture.REGULAR, 12); label.setFont(font); //Creating a spinner Spinner month = new Spinner(1, 12, 4); //Setting the spinner editable month.setEditable(true); //Setting the size month.setPrefSize(75, 25); Label label1 = new Label("Month: "); //Creating a spinner Spinner day = new Spinner(1, 31, 4); //Setting the spinner editable day.setEditable(true); //Setting the size day.setPrefSize(75, 25); Label label2 = new Label("Day: "); //Creating a spinner Spinner year = new Spinner(1947, 2999, 2009); //Setting the spinner editable year.setEditable(true); //Setting the size year.setPrefSize(75, 25); Label label3 = new Label("Year: "); HBox hbox = new HBox(5); hbox.setPadding(new Insets(10, 10, 10, 25)); hbox.getChildren().addAll(label1, month, label2, day, label3, year); //Creating a vbox to hold the pagination VBox vbox = new VBox(); vbox.setSpacing(5); vbox.setPadding(new Insets(10, 10, 10, 25)); vbox.getChildren().addAll(label, hbox); //Setting the stage Group root = new Group(vbox); Scene scene = new Scene(root, 595, 200, Color.BEIGE); stage.setTitle("Spinner"); stage.setScene(scene); stage.show(); } public static void main(String args[]){ launch(args); } }
输出
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