java - How to make a BufferedImage out of other BufferedImage's? - 


public bufferedimage getmap() {     map1 = new bufferedimage(5000,5000,bufferedimage.type_int_rgb);     graphics g = map1.getgraphics();     for(int = 0; < imagestorender.size(); i++)     {         g.drawimage(imagestorender.get(i), xcoords.get(i), ycoords.get(i), sizes.get(i), sizes.get(i),null);     }     g.dispose();     return map1; }

i'm trying make first game on java seem running problem: drops 60fps down 13-21.. , problem occurring in section of code. i'm trying take bunch of bufferedimage arraylist<bufferedimage> imagestorender, respective x,y coordinates on map1 drawn. idea want update game map new images have rendered it. fps not drop gradually: starts , stays between 13 , 21 fps whole time. possible way takes processing power? if so, there better methods? if not, how can fix problem? thank you.


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