code: public static File captureScreen(Rectangle screenRect, File outFile) {
  		return RobotUtil.captureScreen(screenRect, outFile);
  	}
docs: 截屏
  
  @param screenRect 截屏的矩形区域
  @param outFile 写出到的文件
  @return 写出到的文件
  @see RobotUtil#captureScreen(Rectangle, File)