JAVA MouseEvent getButton

public void mouseClicked(MouseEvent e) {
	if (e.getButton() == MouseEvent.BUTTON1) {
		lpm = true;
		System.out.print("LPM");
	}
	if (e.getButton() == MouseEvent.BUTTON2) {
		ppm = true;
		System.out.print("PPM");
	}
	if (e.getButton() == MouseEvent.BUTTON3) {
		spm = true;
		System.out.print("SPM");
	}
}

class Klasa implements MouseListener{

public void mouseClicked(MouseEvent e) {
        if (e.getButton() == MouseEvent.BUTTON1) {
                lpm = true;
                x = e.getX();
		y = e.getY();

                System.out.println("LPM");
                System.out.println("x= " + x + ", " + "y= " + y );
        }
        if (e.getButton() == MouseEvent.BUTTON2) {
                ppm = true;
                System.out.print("PPM");
        }
        if (e.getButton() == MouseEvent.BUTTON3) {
                spm = true;
                System.out.print("SPM");
        }
  }

}

@SuppressWarnings("UseOfSystemOutOrSystemErr")
class MouseEventSupport extends MouseInputAdapter
{
	private enum ButtonState { PRESSED, RELEASED; };
	private enum EventType { BUTTON, AXIS, WHEEL }

	@Override public void mousePressed(final MouseEvent e)
	{
		setButton(e.getButton(), ButtonState.PRESSED);
		showStateChanged(EventType.BUTTON);
	}

	@Override public void mouseReleased(final MouseEvent e)
	{
		setButton(e.getButton(), ButtonState.RELEASED);
		showStateChanged(EventType.BUTTON);
	}

	@Override public void mouseMoved(final MouseEvent e)
	{
		x = e.getX();
		y = e.getY();
		showStateChanged(EventType.AXIS);
	}

	@Override public void mouseWheelMoved(final MouseWheelEvent e)
	{
		wheelRotation = e.getWheelRotation();
		showStateChanged(EventType.WHEEL);
	}

	private void setButton(final int button, final ButtonState newState)
	{
		switch(button)
		{
		case MouseEvent.BUTTON1: lpm = newState; break;
		case MouseEvent.BUTTON2: ppm = newState; break;
		case MouseEvent.BUTTON3: spm = newState; break;
		default: System.out.printf("%s custom button: %d", newState, button);
		}
	}

	private void showStateChanged(final EventType type)
	{
		switch(type)
		{
		case BUTTON: System.out.printf("LPM = %s%nSPM = %s%nPPM = %s%n",
			lpm, spm, ppm);
			break;
		case AXIS: System.out.printf("(x,y) = (%d, %d)%n", x, y);
			break;
		case WHEEL: System.out.printf("WHEEL = %+d%n", wheelRotation);
			break;
		}
	}

	private volatile ButtonState lpm, ppm, spm;
	private volatile int x, y;
	private volatile int wheelRotation;
} //class MouseEventSupport extends MouseInputAdapter