// counts lines
public static int countLines(JTextArea textArea) {
AttributedString text = new AttributedString(textArea.getText());
FontRenderContext frc = textArea.getFontMetrics(textArea.getFont()).getFontRenderContext();
int lines = 0;
if (!textArea.getText().equals("")) {
AttributedCharacterIterator charIt = text.getIterator();
LineBreakMeasurer lineMeasurer = new LineBreakMeasurer(charIt, frc);
float formatWidth = (float) textArea.getSize().width;
lineMeasurer.setPosition(charIt.getBeginIndex());
while (lineMeasurer.getPosition() < charIt.getEndIndex()) {
lineMeasurer.nextLayout(formatWidth);
lines++;
}
for (int i = 0; i < textArea.getText().length(); i++) {
if (textArea.getText().charAt(i) == '\r' || textArea.getText().charAt(i) == '\n') lines++;
}
} else {
lines = 1;
}
return lines;
}
private static int getTextAreaBaseline(JTextArea text, int height) {
Insets insets = text.getInsets();
FontMetrics fm = text.getFontMetrics(text.getFont());
return insets.top + fm.getAscent();
}
