public String toBigString(){
  StringBuilder result=new StringBuilder();
  for (int r=0; r < rows; r++) {
    for (int c=0; c < columns; c++) {
      int value=get(r,c);
      if (value < 0) {
        value+=256;
      }
      result.append(String.format("%02x ",value));
    }
    result.append("\n");
  }
  return result.toString();
}

public String toBigString ( ) { StringBuilder result = new StringBuilder ( ) ; for ( int r = 0 ; r < rows ; r ++ ) { for ( int c = 0 ; c < columns ; c ++ ) { int value = get ( r , c ) ; if ( value < 0 ) { value += 256 ; } result . append ( String . format ( "%02x " , value ) ) ; } result . append ( "\n" ) ; } return result . toString ( ) ; }
returns a human - readable string of the matrix contents . example : 00 01 02 03 04 05 06 07 08 09 0a 0b
