Question: For opencv java,At core rectangle, after new scalar, there is a number 5 and -1 what does it means.And is this method works the same

For opencv java,At core rectangle, after new scalar, there is a number 5 and -1 what does it means.And is this method works the same as imgproc.rectangle for opencv 3.0 For opencv java,At core rectangle, after new scalar, there is a number

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