Question

Is there a reliable way to calculate how is a string divided into rows in JTextArea?

I have a JTextArea with fixed width and when it gets filled, a new row is added and it expands vertically.

Now, I need to know exactly which characters are in which row. I could add up single character widths using font metrics, but I don’t know if that is reliable, or if there may be a better method.

Is the font metrics “trick” the only way?

Answer 1

All JTextComponents have modelToView(...) and viewToModel(...) methods that can help, but perhaps even better are the methods in the javax.swing.text.Utilities class including getRowStart(...) and getRowEnd(...)