The only access you have to the clipboard (unless Samsung included their enhanced clipboard in the J3*) is copy, cut and paste. You do that in text boxes.
*In the enhanced clipboard, you get a selection of the past few things you copied or cut when you try to paste. In the standard clipboard it's just the last item put there that's available. Put another item there and it overwrites the older one. (There are apps, like Clipper Clipboard Manager that give you more items at a time.)