如何在 JavaFX 中建立微調器?
微調器是一種 UI 元素,它顯示一個數字,並帶有向上和向下箭頭。可以使用這些箭頭增大或減小微調器的值。可透過例項化 javafx.scene.control.Spinner 類來建立一個微調器。
例項
以下示例演示如何建立 **微調器**。
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);
}
}輸出

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