public void actionPerformed(ActionEvent arg0) {
				String txt1 = textArea.getText();
				String liniije[] = txt1.split("\n");
				String txtLine = "";
				for (int i = 0; i < liniije.length; i++) {
					txtLine = txtLine + i + ": " + liniije[i] + "\n";

				}
				textArea.setText(txtLine);
			}