int (Font font, int mask) { if (mask != Font.PLAIN) { //noinspection MagicConstant font = font.deriveFont(mask ^ font.getStyle()); } font = font.deriveFont(SIZE_FOR_MONOSPACED_CHECK); int width = getCharWidth(font, ' '); return width == getCharWidth(font, 'l') && width == getCharWidth(font, 'W') ? width : 0; }