是否可以在JavaFX上创建XYChart.Series数组? [英] Is it possible to create an array of XYChart.Series on JavaFX?

问题描述

我想知道是否可以在JavaFX上创建XYChart.Series<String, Number>的数组吗?

I want to know if I can create an array of XYChart.Series<String, Number> on JavaFX?

因为我需要为数据库中的每个人创建一个XYChart.Series，所以我尝试为我的LineChart创建一个XYChart.Series<String, Number>数组，但我做不到.

Because I need to create a XYChart.Series for each person on database, and I tried to make an array of XYChart.Series<String, Number> for my LineChart but I couldn't.

这是我尝试过的:

List<XYChart.Series<String, Number>> seriesList = new ArrayList<XYChart.Series<String, Number>>();

因为我不知道该怎么做.

Because I had no idea how to do it otherways.

你能帮我吗?

推荐答案

您可以创建原始类型的数组，并将其分配给使用通用类型声明的变量.

You can create a array of the raw type and assign it to a variable declared with a generic type.

int size = ...
XYChart.Series<String, Number>[] seriesArray = new XYChart.Series[size];

更新

仍然需要以这种方式初始化数组元素，因为以这种方式生成的数组被null元素填充.

Array elements still need to be initialized this way since arrays generated this way are filled with null elements.

Java 8提供了一种创建&通过流API使用短代码初始化数组:

Java 8 provides a way create & initilize a array using short code via streams API:

XYChart.Series<String, Number>[] seriesArray = Stream.<XYChart.Series<String, Number>>generate(XYChart.Series::new).limit(size).toArray(XYChart.Series[]::new);

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