$opt$setObjectField
$opt$setIntField
$opt$setFloatField
$opt$setLongField
$opt$setDoubleField
$opt$setByteField
$opt$setBooleanField
$opt$setCharField
$opt$setShortField
$opt$getObjectField
$opt$getIntField
$opt$getFloatField
$opt$getLongField
$opt$getDoubleField
$opt$getByteField
$opt$getBooleanField
$opt$getCharField
$opt$getShortField