Getting Caret position from JTextArea

问题

I can get row number and column number from Jtextarea by using,

   int caretpos = textArea.getCaretPosition();
   int row = textArea.getLineOfOffset(caretpos);

   int column = caretpos - textArea.getLineStartOffset(row);

How can i get the caret position from row number and column number?

回答1:

for both your questions, answer could be deleted

• Document is Model for JTextComponents

• you can to determine int start / end for every row(s)

• you can to determine int start / end for Caret by CaretListener

• for listening of changes from view is there DocumentListener

• for preventing / modifying of input is there DocumentFilter

来源：https://stackoverflow.com/questions/12331861/getting-caret-position-from-jtextarea