如何在Java中检测视网膜显示？

我将以这种方式获得价值

public static boolean hasRetinaDisplay() {  Object obj = Toolkit.getDefaultToolkit()      .getDesktopProperty(          "apple.awt.contentScaleFactor");  if (obj instanceof Float) {    Float f = (Float) obj;    int scale = f.intValue();    return (scale == 2); // 1 indicates a regular mac display.  }  return false;}