What's your favourite Data analytics/ visualisation tool? and why ?

MsPaint. Definitely MsPaint.

I try visualizing data via my own code in java.

JFrame is fine for simple stuff.

We use Tableau, but I don't have any clue how it works

@SortOfTested noob, use imagination, MS paint is lame 😒

If you are sourcing data from Elasticsearch, kibana can be considered. Using kibana, you can quickly create dashboards/charts from the data in an index. Also, the enterprise version comes with a lot of inbuilt machine learning based analytics.