public List(int rows, boolean multipleMode) { this.rows = rows; this.multipleMode = multipleMode;  if (GraphicsEnvironment.isHeadless()) throw new HeadlessException(); }
List() { this(4, false); }
	public List(int rows, boolean multipleMode) {		this.rows = rows;		this.multipleMode = multipleMode;		if (GraphicsEnvironment.isHeadless())			throw new HeadlessException();	}