Creating bar charts

A bar chart uses two axes with rectangular bars that can be either positioned either vertically or horizontally. The length of a bar is proportional to the value it represents. A bar chart can be used to show time series data.

In the following series of examples, we will be using a set of European country populations for three decades, as listed in the following table. The data is a subset of population data found at https://ourworldindata.org/grapher/population-by-country?tab=data:

Country	1950	1960	1970
Belgium	8,639,369	9,118,700	9,637,800
France	42,518,000	46,584,000	51,918,000
Germany	68,374,572	72,480,869	77,783,164
Netherlands	10,113,527	11,486,000	13,032,335
Sweden	7,014,005	7,480,395	8,042,803
United Kingdom	50,127,000	52,372,000	55,632,000

The first of three bar charts will be constructed using JavaFX. We start with a series of declarations for the countries as part of a class that extends the Application class:

public class MainApp...