java drawing graphs or trees in console

If I remember well, you can draw ascii graphs with javaplot

For people coming here looking for a pure Java tree drawing library: I recommend text-tree, which draws trees like this (and other styles, a lot of possible config if you need it):

some text
├─── more text
├─── and more
│    ├─── still more
│    ╰─── more
╰─── the end

Full disclosure: I am the author of text-tree.

You can print ascii trees with minimal code. See the second answer to this question: How to print binary tree diagram?

(the second answer because this one is not only for binary trees)