private AsciiImgCache(final Dimension characterImageSize,final Map<Character,GrayscaleMatrix> imageCache,final char[] characters){
  this.characterImageSize=characterImageSize;
  this.imageCache=imageCache;
}

private AsciiImgCache ( final Dimension characterImageSize , final Map < Character , GrayscaleMatrix > imageCache , final char [ ] characters ) { this . characterImageSize = characterImageSize ; this . imageCache = imageCache ; }
instantiates a new ascii img cache .
