Java jfreechart中DatasetUtilities.createCategoryDataset的使用 [英] Usage of DatasetUtilities.createCategoryDataset in jfreechart in java

问题描述

我正在创建一个堆栈条形图，其中x轴为ApplicationName，Y轴为UserName.我正在使用:

I am creating a Stack Bar chart with ApplicationName on x axis and UserName on Y axis. I am using:

CategoryDataset stackDataset =  DatasetUtilities.createCategoryDataset("Users","App", double[][]data);

它将在StackBarchart的Y轴上填充User1，User2，User3，并在X轴上填充App1，App2等.

It populates the StackBarchart labelling User1, User2 ,User3 on Y axis and similarly App1, App2 etc on X-axis.

问题:我有一个userName和applicationName的数组列表，例如:

Problem: I have an arraylist of userName and applicationName like:

userName = [Max, John,Willy]
appname =[Google, Fb, Twitter]

这些名称我必须填充，而不是user1或app1.我已经搜索了一些方法来执行此操作，但是无法执行此操作.使用的代码将是

And these names i have to populate instead of user1 or app1. I have searched something to do this but i am unable to implement this . The code used will be

CategoryDataset stackDataset = createCategoryDataset(java.lang.Comparable[] rowKeys, java.lang.Comparable[] columnKeys, double[][] data)

任何帮助都可以得到.

推荐答案

有一个

There is a version of CategoryDataset that accepts arrays as a parameter, your call shold look like this

    String[] userName = new String[] {"Max", "John","Willy"};
    String[] appname =new String[] {"Google", "Fb", "Twitter"};
    double[][] data = new double[][] {{2,5,3},{2,6,7},{3,5,6}};
    return DatasetUtilities.createCategoryDataset(userName,appname,data);

如果您是用户JFreeChart 1.0.14，则 createCategoryDataset 是重载的方法:

If you are user JFreeChart 1.0.14 createCategoryDataset is an overloaded method:

您需要使用这组参数

public static CategoryDataset createCategoryDataset(Comparable[] rowKeys,
    Comparable[] columnKeys, double[][] data) 

请记住， String 实现了 Comparable< String> ，因此您可以使用 String []

Remember that String implements Comparable<String> so you can use a String[]

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