惠州如何创建JavaFX气泡图？_北大青鸟IT学校

Java是现在非常主流的编程语言之一，很多人想转行学习IT，首选Java语言。那么如何创建JavaFX气泡图呢？下面就让我们一起来看看惠州北大青鸟老师是怎么回答的。

什么是JavaFX气泡图呢？

JavaFX气泡图是一个双轴图表，为一系列数据点绘制气泡。

如何创建JavaFX气泡图？

要创建气泡图，我们创建BubbleChart类，定义水平和垂直轴，并使用添加一个或多个数据系列XYChart.Data类。

/*
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*///package bubblechartsample;import javafx.application.Application;import javafx.scene.Scene;import javafx.scene.chart.BubbleChart;import javafx.scene.chart.NumberAxis;import javafx.scene.chart.XYChart;import javafx.scene.paint.Color;import javafx.stage.Stage;public class Main extends Application {

   @Override public void start(Stage stage) {
       stage.setTitle("Bubble Chart Sample");        final NumberAxis xAxis = new NumberAxis(1, 53, 4);        final NumberAxis yAxis = new NumberAxis(0, 80, 10);        final BubbleChart<Number,Number> blc =
           new BubbleChart<Number,Number>(xAxis,yAxis);
       xAxis.setLabel("Week");
       xAxis.setTickLabelFill(Color.CHOCOLATE);
       xAxis.setMinorTickCount(4);
     
       yAxis.setLabel("Product Budget");
       yAxis.setTickLabelFill(Color.CHOCOLATE);
       yAxis.setTickLabelGap(10);
       yAxis.setTickLabelFormatter(            new NumberAxis.DefaultFormatter(yAxis,"$ ",null)
       );
                             
       blc.setTitle("Budget Monitoring");
       
       XYChart.Series series1 = new XYChart.Series();
       series1.setName("Product 1");
       series1.getData().add(new XYChart.Data(3, 35, 2));
       series1.getData().add(new XYChart.Data(12, 60, 1.8));
       series1.getData().add(new XYChart.Data(15, 15, 7));
       series1.getData().add(new XYChart.Data(22, 30, 2.5));
       series1.getData().add(new XYChart.Data(28, 20, 1));
       series1.getData().add(new XYChart.Data(35, 41, 5.5));
       series1.getData().add(new XYChart.Data(42, 17, 9));
       series1.getData().add(new XYChart.Data(49, 30, 1.8));
               
       XYChart.Series series2 = new XYChart.Series();
       series2.setName("Product 2");
       series2.getData().add(new XYChart.Data(8, 15, 2));
       series2.getData().add(new XYChart.Data(13, 23, 1));
       series2.getData().add(new XYChart.Data(15, 45, 3));
       series2.getData().add(new XYChart.Data(24, 30, 4.5));
       series2.getData().add(new XYChart.Data(38, 78, 1));
       series2.getData().add(new XYChart.Data(40, 41, 7.5));
       series2.getData().add(new XYChart.Data(45, 57, 2));
       series2.getData().add(new XYChart.Data(47, 23, 3.8));
                     
       Scene scene  = new Scene(blc);
       blc.getData().addAll(series1, series2);    
       //scene.getStylesheets().add("bubblechartsample/Chart.css");        stage.setScene(scene);
       stage.show();
   }    public static void main(String[] args) {
       launch(args);
   }
}

NumberAxis.DefaultFormatter类将向指定轴的标记添加前缀和后缀。

yAxis.setTickLabelFormatter(new NumberAxis.DefaultFormatter(yAxis,"$ ",null));

以下代码行指定了刻度标签的CHOCOLATE颜色。

xAxis.setTickLabelFill(Color.CHOCOLATE);
yAxis.setTickLabelFill(Color.CHOCOLATE);

上面的代码生成以下结果。

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