txtArea.addKeyListener(new KeyListener() {

    @Override
    public void keyTyped(KeyEvent e) {
        }
    @Override
    public void keyPressed(KeyEvent e) {
            String notThisTxt = txtArea.getText();
            String text1 = "Please enter your text in here!";
            String text2 = "Text added successfully!";

            if(!notThisTxt.contentEquals(text1) || !notThisTxt.contentEquals(text2)) {
            if ((e.getKeyCode() == KeyEvent.VK_C) && e.isControlDown()) {
                try {
                    file.createNewFile();
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                    FileWriter fw = null;
                    String someSpace = " ";
                    BufferedWriter br = null;
            try {
                    fw = new FileWriter(file.getAbsoluteFile(), true);
                    br = new BufferedWriter(fw);

                    br.write(someSpace);
                    txtArea.write(br);
                }catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }finally {
                }try {
                        br.close();
                        fw.close();
                }catch(IOException e2) {
                        System.out.println("The programm doesn't want to close!" + e2);
                    }
                }
                    txtArea.setText(txtAdded);
                }
                else{
                       System.out.println("test");
                    }
                }

            @Override
            public void keyReleased(KeyEvent e) {
            }
        });