How do I read CLOBs data from database?

package org.kodejava.example.sql;

import java.io.File;
import java.io.FileWriter;
import java.io.Reader;
import java.sql.*;

public class ClobReadDemo {
private static String url = "jdbc:oracle:thin:@localhost:1521:xe";
    private static String username = "kodejava";
    private static String password = "welcome";

    public static void main(String[] args) throws Exception {
        Connection conn = null;
        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            conn = DriverManager.getConnection(url, username, password);

            String sql = "SELECT name, description, data FROM documents ";
            PreparedStatement stmt = conn.prepareStatement(sql);
            ResultSet resultSet = stmt.executeQuery();
            while (resultSet.next()) {
                String name = resultSet.getString(1);
                System.out.println("Name        = " + name);
                String description = resultSet.getString(2);
                System.out.println("Description = " + description);

                File data = new File("C:\\The Appfuse Primer.txt");

                // Get the character stream of our CLOB data
                Reader reader = resultSet.getCharacterStream(3);
                FileWriter writer = new FileWriter(data);
                char[] buffer = new char[1];
                while (reader.read(buffer) > 0) {
                    writer.write(buffer);
                }
                writer.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (conn != null && !conn.isClosed()) {
                conn.close();
            }
        }
    }
}

How do I drop table from database?

This example is to show you how to delete or drop a table from your database. Basically we just send a drop table command and specify the table name to be deleted to the database. The example below show you how to do it in Oracle database.

package org.kodejava.example.sql;

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

public class DropTableExample {
    public static void main(String[] args) throws Exception {
        Connection connection = null;
        try {
            // This is the JDBC driver class for Oracle database
            Class.forName("oracle.jdbc.driver.OracleDriver");

            // We use an Oracle express database for this example
            String url = "jdbc:oracle:thin:@localhost:1521:xe";

            // Define the username and password for connection to
            // our database.
            String username = "kodejava";
            String password = "kodejava123";

            // To delete a table from database we use the DROP TABLE
            // command and specify the table name to be dropped
            String sql = "DROP TABLE books";

            // Connect to database
            connection = DriverManager.getConnection(url, username, password);
            // Create a statement
            Statement statement = connection.createStatement();
            // Execute the statement to delete the table
            statement.execute(sql);
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (connection != null && !connection.isClosed()) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}