How to insert OBJECT TYPE Value in Oracle Table?

Below Java code shows, how to insert OBJECT TYPE value in Oracle Table –

* Created on 05-2011 Copyright(c) All Rights Reserved.
package com.kodehelp.javasql;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

* Created by
* Date: 5/3/11
public class InsertObjectValue {
public static void main(String args[]) throws SQLException, ClassNotFoundException {
final String driver = "oracle.jdbc.driver.OracleDriver";
final String url = "jdbc:oracle:thin:@HOST:PORT:SID";
final String USERNAME = "USERNAME";
final String PASSWORD = "PASSWORD";
Class.forName(driver); // load Oracle driver
Connection conn = DriverManager.getConnection(url, USERNAME, PASSWORD);

Statement stmt = conn.createStatement();
stmt.execute("CREATE TYPE obj2 AS OBJECT(col_string2 VARCHAR(30), col_integer2 NUMBER)");
stmt.execute("CREATE TYPE obj1 AS OBJECT(col_string1 VARCHAR(30), col_integer2 obj2)");
stmt.execute("CREATE TABLE obj1_table(col_integer NUMBER, col_obj1 obj1)");
stmt.execute("INSERT INTO obj1_table VALUES(1, obj1(‘str1’, obj2(‘obj2str1’, 123)))");