public sqlconnection()
{
    try
    {
        Connection myConn = DriverManager.getConnection( "jdbc:mysql://localhost:3306/userlogin","jeddy","admin");
        insertIntoDB();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}

public void insertIntoDB() throws SQLException
{
    try
    {
        String driver ="com.mysql.jdbc.Driver";

        Class.forName(driver);
        String inpUsername=console.readLine("Enter username: ");
        String inpPassword=console.readLine("Enter password: ");

        String sql = ("insert into user(username, password) values('"+inpUsername+"', '"+inpPassword+"')");
        PreparedStatement pStmt = myConn.prepareStatement(sql);

        pStmt.executeUpdate();

    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}