java - Sizing srollpane on textarea & textfield -

i writing code, have 1 textfield & 1 textarea seperate scrollpane each.

now need want set size of scrollpane such should automatically move cursor next line, whenever user reaches end of first row of textarea or textfield. please tell me if can me out.

below code set scrollpane textarea & textfield:

   jscrollpane talkpane = new jscrollpane(talkarea,jscrollpane.vertical_scrollbar_always,                  jscrollpane.horizontal_scrollbar_never);       talkpane.setviewportview(talkarea);      jscrollpane inputpane = new jscrollpane(inputfield, jscrollpane.vertical_scrollbar_always,                  jscrollpane.horizontal_scrollbar_never); 

a text field displays single line of text makes no sense text field. don't add text field scrollpane. user uses caret scroll forwards/backwards see more text.

for jtextarea can turn wrapping on. text automatically wrap next line along caret type.

textarea.setlinewrap(true); 

now need want set size of scrollpane

you don't set size of scrollpane. give scrollpane hint doing:

jtextarea textarea = new jtextarea(row, columns); 

then viewport of scrollpane sized based on row/column specify.