Java FX 数据绑定demo

package com.example.bindingdemon; import javafx.application.Platform; import javafx.beans.property.IntegerProperty; import javafx.beans.property.SimpleIntegerProperty; import javafx.event.ActionEvent; import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.control.ProgressBar; import javafx.scene.shape.Arc; import java.net.URL; import java.util.ResourceBundle; public class HelloController implements Initializable { @FXML public Arc arc; @FXML public Label numLabel; @FXML public Button addBtn; @FXML public Button subBtn; @FXML public ProgressBar bar; IntegerProperty integerProperty = new SimpleIntegerProperty(0); @Override public void initialize(URL url, ResourceBundle resourceBundle) { arc.setStartAngle(90); arc.setLength(-0); numLabel.textProperty().bind(integerProperty.asString()); addBtn.disableProperty().bind(integerProperty.greaterThanOrEqualTo(100)); subBtn.disableProperty().bind(integerProperty.lessThanOrEqualTo(0)); integerProperty.addListener((observableValue, number, t1) -> { arc.setStartAngle(90); arc.setLength(-t1.intValue() * 3.6); bar.setProgress(t1.intValue() / 100.0); }); } @FXML public void sub(ActionEvent actionEvent) { integerProperty.set(integerProperty.get() - 10); } @FXML public void add(ActionEvent actionEvent) { integerProperty.set(integerProperty.get() + 10); } }