public static void copyToRange(byte[] src,byte[] dest,int destIx){
  assertTrue(src.length < dest.length - destIx);
  System.arraycopy(src,0,dest,destIx,src.length);
}

public static void copyToRange ( byte [ ] src , byte [ ] dest , int destIx ) { assertTrue ( src . length < dest . length - destIx ) ; System . arraycopy ( src , 0 , dest , destIx , src . length ) ; }
copies src array range [ 0 . . src . length ] to dest array starting at destix .
