Write a program to demonstrate use of commit and rollback methods in JDBC programming.

To demonstrate the use of commit and rollback methods in JDBC (Java Database Connectivity) programming, we need to follow these steps:

1. Establish a connection to the database.
2. Disable auto-commit mode, so we can manually control transactions.
3. Perform a series of database operations (e.g., insertions, updates).
4. Use the commit method to save the changes if all operations succeed.
5. Use the rollback method to undo changes if any operation fails.

Here’s a complete Java program that demonstrates this process:

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

public class JDBCCommitRollbackDemo {

    public static void main(String[] args) {
        // Database URL, username, and password
        String url = "jdbc:mysql://localhost:3306/testdb";
        String user = "root";
        String password = "password";

        Connection conn = null;
        PreparedStatement pstmt1 = null;
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