Cut and move image using mouse ?

Hello,
I am developing one paint program. I am making it similar to microsoft paint. In This paint, I want to use lasso, magic wand tool and select tool. But I am not too familiar with java. And want to do with your help. Please help on this topic. If lasso and magic wand tools behave same. Then please tell me about only select tool that will use for the purpose of select a particular area from canvas (canvas is drawing sheets that holds the drawing). Please help me.
If there is any snippet of this above declaration please send. Can we use system clipboard to cut, move and paste for this drawing by the help of mouse. Please help me. I will really thankful to you.
Thanks in advance.
Manveer

For the Magic Wand (at least for what I suppose it is) I would consider the image as a graph, where two pixels are connected if the difference between their color values is below some tolerance value. Then you can easily perform the iterative breadth-first algorithm to collect the pixels of the selection. I recently did something similar (although not on an image itself, but on some higher abstraction of it).
For the Lasso i would collect all the pixels, the user selects, then calculate the bounding box over the selected pixel area and finally determine for each pixel inside the bounding box, that is no member of the lasso/selection pixels, whether it lies inside or outside the selection area. This could be accomplished by performing another bfs from one pixel, that includes all pixels besides the ones lying outside the bounding box or are pixels of the selection lasso.

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