Re: deserilize question

here is a condensed code showing effort to deserialize my hashmap object
have yet to code the serialize (writeobject )

in RegexRecord.java::::::::::::::::::::
package regextest;

public class RegexRecord {
    String Name, Regex, Remark, Option, Groups;
    Boolean bTested;

    /** Creates a new instance of RegexRecord */
    public RegexRecord() {
    }

}

In RegexText.java:::::::::::::::
package regextest;

import java.util.regex.*;
import java.util.*;
import java.io.*;

public class RegexTest extends javax.swing.JFrame {
    static final long serialVersionUID = 1239487938L;

    HashMap<String, RegexRecord> myRegexHolder;
    String strHomeFolder, strRegexHolderObjFSpec;
    final String strRegexHolderObjFN = ".RegexHolderObj.ser";
    /** Creates new form RegexTest */
    public RegexTest() {
        this.setTitle("Regex Test");
        this.setSize(850, 860);

        this.setVisible(true);
        this.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);

        // setup myRegexHolder

        try {
            strHomeFolder = System.getenv("home");
            setStatus("HOME is "+strHomeFolder);
        } catch (Exception e){
            strHomeFolder = "h:/";
            setStatus("Security exception or not finding HOME environment -
defaulted HomeFolder to h:/");
        } ;
        strRegexHolderObjFSpec = strHomeFolder + strRegexHolderObjFN;
        if ( (new java.io.File(strRegexHolderObjFSpec)).exists()) {
            // restore myRegexHolder
            boolean bFailed = false;
            try {
                // read and deserialize the blob
                FileInputStream fileIn = new
FileInputStream(strRegexHolderObjFSpec);
                ObjectInputStream ois = new ObjectInputStream(fileIn);
                myRegexHolder = (HashMap<String, regextest.RegexRecord>)
ois.readObject();
                //myRegexHolder = myRegexHolder.readObject(ois);
                ois.close();
            } catch (ClassNotFoundException ex) {
                setStatus("Exception in deSerializing myRegexHolder: " +
ex.getMessage());
                ex.printStackTrace();
                bFailed = true;
            } catch (IOException ex) {
                setStatus("Exception in deSerializing myRegexHolder - IO
error: " + ex.getMessage());
                ex.printStackTrace();
                bFailed = true;
            }

            if ( bFailed == false) setStatus("restore myRegexHolder
successfully from user file");

        } else {
            // create empty myRegexHolder
            myRegexHolder = new HashMap<String, RegexRecord>(180,
(float)0.75);
            setStatus("Created myRegexHolder successfully for initial
capacity of 180 and 75% load factor");
        };
    }

    void setStatus(String strMsg) {
        JOptionPane.showMessageDialog(null, "RegexTest serialization Demo",
strMsg,
            JOptionPane.INFORMATION_MESSAGE);
   // this is replacement of the swing status gui to demonstrate problem
            // not real production code
    }

}

Naturally I got the compiler message
regextest2.java:40: warning: [unchecked] unchecked cast
found : java.lang.Object
required: java.util.HashMap<java.lang.String,regextest.RegexRecord>
                myRegexHolder = (HashMap<String, RegexRecord>)
ois.readObject();

^
1 warning

I thought I don't have to write my own serialization code but I am using jdk
1.5

Thank you very much for your time.