Casting or Generics, which is better?

Question

Which is better for serialization <--> de-serialization?
public class MyClass {
private Object st;
public MyClass (Object what) { st = what; }
public Object get() {return st;}
out.writeObject(new MyClass("This is a test"));
Object ob =  in.readObject();
if (ob instanceof String) {
  Sting result = (String) ob;
}Or using Generics?
public static final byte STRING_TYPE = 0x01;
public class MyClass<T> {
private T st;
private byte type;
public MyClass ( byte type, T what ) { st = what; this.type = type; }
public T get() {return st;}
public byte getType() {return type;}
out.writeObject(new MyClass<String>(STRING_TYPE,"This is a test"));
MyClass<?> value =  (MyClass<?>) in.readObject()
if (value.getType() == STRING_VALUE) {
  MyClass<String> str = (MyClass<String>) value;
  Sting result = str.get();
}Both have unchecked casts (at least according to Eclipse), it is better to cast the generic or just use casts and not use generics? The latter is more complicated but allows more flexibility, but which method is correct?

Answer 1

CREATE TABLE `login` (
`username` varchar(40) DEFAULT NULL,
`password` varchar(40) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `amount` (
`amountid` int(11) NOT NULL,
`receiptid` int(11) DEFAULT NULL,
`loanid` int(11) DEFAULT NULL,
`amount` bigint(11) DEFAULT NULL,
`latefee` int(11) DEFAULT NULL,
`paymentid` int(11) DEFAULT NULL,
`pid` int(11) DEFAULT NULL,
PRIMARY KEY (`amountid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `applicationfee` (
`applicationfeeid` int(11) DEFAULT NULL,
`applicationamount` int(11) DEFAULT NULL,
`applicationfee` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `category` (
`categoryid` int(11) DEFAULT NULL,
`categoryname` varchar(40) DEFAULT NULL,
`categorydescription` varchar(500) DEFAULT NULL,
`cattype` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `commission` (
`commissionid` int(11) DEFAULT NULL,
`bussiness` int(11) DEFAULT NULL,
`commission` int(11) DEFAULT NULL,
`pid` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `customer` (
`cacno` int(11) NOT NULL DEFAULT '0',
`name` varchar(40) DEFAULT NULL,
`age` int(11) DEFAULT NULL,
`cphone` varchar(40) DEFAULT NULL,
`cmobile` varchar(40) DEFAULT NULL,
`caddress` varchar(500) DEFAULT NULL,
`cstatus` varchar(20) DEFAULT NULL,
`cphoto` longblob,
`pid` int(11) DEFAULT NULL,
PRIMARY KEY (`cacno`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `daybook` (
`closingbal` varchar(40) DEFAULT NULL,
`date` date DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `extraincome` (
`categoryid` int(11) NOT NULL,
`receiptid` int(11) DEFAULT NULL,
`date` date DEFAULT NULL,
`amountid` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `employee` (
`empno` int(11) DEFAULT NULL,
`empname` varchar(40) DEFAULT NULL,
`age` int(11) DEFAULT NULL,
`sal` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `image` (
`id` int(11) DEFAULT NULL,
`image` blob
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `loan` (
`loanid` int(11) NOT NULL DEFAULT '0',
`loanamt` varchar(40) DEFAULT NULL,
`payableamount` double DEFAULT NULL,
`installment` int(11) DEFAULT NULL,
`payableinstallments` int(11) DEFAULT NULL,
`monthlyinstallment` varchar(20) DEFAULT NULL,
`surityname` varchar(20) DEFAULT NULL,
`applicationfeeid` int(11) DEFAULT NULL,
`interestrate` float DEFAULT NULL,
`issuedate` date DEFAULT NULL,
`duedate` date DEFAULT NULL,
`nextduedate` date DEFAULT NULL,
`cacno` int(11) DEFAULT NULL,
`cname` varchar(20) DEFAULT NULL,
`pid` int(11) DEFAULT NULL,
`interestamt` double DEFAULT NULL,
`pendingamt` float DEFAULT NULL,
PRIMARY KEY (`loanid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `md` (
`mdid` int(11) NOT NULL DEFAULT '0',
`mdname` varchar(40) DEFAULT NULL,
`mdphoto` varchar(100) DEFAULT NULL,
`mdphone` varchar(40) DEFAULT NULL,
`mdmobile` varchar(40) DEFAULT NULL,
`mdaddress` varchar(500) DEFAULT NULL,
PRIMARY KEY (`mdid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `partner` (
`pid` int(11) NOT NULL DEFAULT '0',
`pname` varchar(40) DEFAULT NULL,
`paddress` varchar(500) DEFAULT NULL,
`pphoto` varchar(100) DEFAULT NULL,
`pphone` varchar(40) DEFAULT NULL,
`pmobile` varchar(40) DEFAULT NULL,
`pstatus` varchar(20) DEFAULT NULL,
`mdid` int(11) DEFAULT NULL,
`mdname` varchar(40) DEFAULT NULL,
`date` date DEFAULT NULL,
`nextpaydate` date DEFAULT NULL,
PRIMARY KEY (`pid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `partnerinvested` (
`pid` int(11) DEFAULT NULL,
`pname` varchar(20) DEFAULT NULL,
`receiptid` int(11) DEFAULT NULL,
`date` date DEFAULT NULL,
`amountinvested` int(11) DEFAULT NULL,
`latefee` int(11) DEFAULT NULL,
`amountid` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `payments` (
`paymentid` int(11) NOT NULL,
`categoryid` int(11) DEFAULT NULL,
`particulars` varchar(100) DEFAULT NULL,
`amountid` int(11) DEFAULT NULL,
`paymentdate` date DEFAULT NULL,
PRIMARY KEY (`paymentid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `receipts` (
`receiptid` int(11) DEFAULT NULL,
`paiddate` date DEFAULT NULL,
`amountid` int(11) DEFAULT NULL,
`loanid` int(11) DEFAULT NULL,
`latefee` int(11) DEFAULT NULL,
`installment` int(11) DEFAULT NULL,
`cacno` int(11) DEFAULT NULL,
`cname` varchar(40) DEFAULT NULL,
`pid` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;