How to display tree hierarchy in Java?

I have a table in a database named "Process" This process table has 3 fields: - process_id - process_name - process_parent_id Now I want to display this parent child hierarchy in Graphical format. So could you please suggest me the following: Q1. Which data structure would be better to use so as to get data from the database and store in that data structure? Q2. How to display that tree (process hierarchy) in graphical format? ---------- EDIT: I want the graphical format something like this: [![Tree hierarchy][1]][1] [1]:

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