惠州JavaFX散点图如何添加系列？_北大青鸟IT学校

JavaFX散点图如何添加系列？相信学过Java的同学都遇到过这个问题，那么答案是什么呢？接下来一起来看看惠州北大青鸟老师是怎么回答的。

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*/import javafx.application.Application;import javafx.collections.FXCollections;import javafx.event.ActionEvent;import javafx.event.EventHandler;import javafx.geometry.Insets;import javafx.scene.Group;import javafx.scene.Scene;import javafx.scene.chart.NumberAxis;import javafx.scene.chart.ScatterChart;import javafx.scene.chart.XYChart;import javafx.scene.control.Button;import javafx.scene.effect.DropShadow;import javafx.scene.layout.HBox;import javafx.scene.layout.VBox;import javafx.scene.paint.Color;import javafx.stage.Stage;public class Main extends Application {

   @Override public void start(Stage stage) {
       stage.setTitle("Scatter Chart Sample");        final NumberAxis xAxis = new NumberAxis(0, 10, 1);        final NumberAxis yAxis = new NumberAxis(-100, 500, 100);        
       final ScatterChart<Number,Number> sc = new ScatterChart<Number,Number>(xAxis,yAxis);
       xAxis.setLabel("Age (years)");                
       yAxis.setLabel("Returns to date");
       sc.setTitle("Investment Overview");
     
       XYChart.Series series1 = new XYChart.Series();

       series1.setName("Option 1");
       series1.getData().add(new XYChart.Data(4.2, 193.2));
       series1.getData().add(new XYChart.Data(2.8, 33.6));
       series1.getData().add(new XYChart.Data(6.2, 24.8));
         
       sc.setPrefSize(500, 400);
       sc.getData().addAll(series1);
       Scene scene  = new Scene(new Group());        final VBox vbox = new VBox();        final HBox hbox = new HBox();        
       final Button add = new Button("Add Series");
       add.setOnAction(new EventHandler<ActionEvent>() {
           @Override public void handle(ActionEvent e) {                if (sc.getData() == null)
                   sc.setData(FXCollections.<XYChart.Series<Number,
                       Number>>observableArrayList());
               ScatterChart.Series<Number, Number> series =
                   new ScatterChart.Series<Number, Number>();
               series.setName("Option "+(sc.getData().size()+1));                for (int i=0; i<100; i++) series.getData().add(                    new ScatterChart.Data<Number,
                       Number>(Math.random()*100, Math.random()*500));
               sc.getData().add(series);
           }
       });        
       final Button remove = new Button("Remove Series");
       remove.setOnAction(new EventHandler<ActionEvent>() {
           @Override public void handle(ActionEvent e) {        if (!sc.getData().isEmpty())
           sc.getData().remove((int)(Math.random()*(sc.getData().size()-1)));
           }
       });        
       final DropShadow shadow = new DropShadow();
       shadow.setOffsetX(2);
       shadow.setColor(Color.GREY);
       sc.setEffect(shadow);
               
       hbox.setSpacing(10);
       hbox.getChildren().addAll(add, remove);
       
       vbox.getChildren().addAll(sc, hbox);
       hbox.setPadding(new Insets(10, 10, 10, 50));
       
       ((Group)scene.getRoot()).getChildren().add(vbox);
       stage.setScene(scene);
       stage.show();
   }    public static void main(String[] args) {
       launch(args);
   }
}

上面的代码生成以下结果。

想了解更多关于Java的资讯，可以来惠州北大青鸟新方舟校区了解一下。

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