question: public JPEGQTable ( int [ ] table ) { if ( table == null ) { throw new IllegalArgumentException ( "table must not be null." ) ; } if ( table . length != 64 ) { throw new IllegalArgumentException ( "table.length != 64" ) ; } qTable = Arrays . copyOf ( table , table . length ) ; }
target:  Constructs a quantization table from the argument, which must contain 64 elements in natural order (not zig-zag order). A copy is made of the the input array.