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Thread: Can't get the Update statement to work

  1. #1
    Junior Member
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    Unhappy Can't get the Update statement to work

    I'm trying to get all the names of my movie files from a directory and i'm trying to store them in a database under the column movies.
    One other column in the database labeled music already has some data, and the rows under the Movie column are null, so I'm trying to update these values using the update statement.

    The program runs successfully but the data i'm trying to get is not stored in the database, the update statement i think is not working.

    what do you think may be the problem? thanks




    package organizer;
    import java.io.File;
    import java.io.IOException;
    import java.sql.*;
    import java.util.ArrayList;
    /
    public class Get_Files {

    static Connection conn;

    public static void main(String args[]) throws SQLException, ClassNotFoundException, InterruptedException, IOException,SQLSyntaxErrorException{

    String driver = "org.apache.derby.jdbc.ClientDriver"; //driver url
    String connectionURL = "jdbc:derby://localhost:1527/Organizer"; // connection url
    String Username= "my_name"; //Username
    String Password= "my_password"; //password

    Class.forName(driver);//loads the driver

    conn = DriverManager.getConnection(connectionURL,Username ,Password); //makes connection


    String file_name;

    File file = new File("G:\\Movies"); //PAth to files
    File[] files = file.listFiles(); //Creates an array of files in the path.
    ArrayList<String> Movies = new ArrayList<>();

    for (int fileInList = 0; fileInList < files.length; fileInList++)
    {

    if (files[fileInList].isFile())
    {
    file_name = files[fileInList].getName().toString();
    Movies.add(file_name); // adds file names into an array list

    }
    //System.out.println(files[fileInList].toString()+fileInList);
    //Movies.add(files[fileInList].toString());

    }

    for(int x=0; x<files.length;x++)

    {
    // statement.executeUpdate("INSERT INTO APP.EXTERNAL_HD_FILES(ID,MUSIC)"//Executes Sql Statement
    // + "values("+x+",'"+Movies.get(x)+"')");
    //System.out.println(Movies.get(x));
    try{


    Statement statement = conn.createStatement();

    String qry="UPDATE APP.EXTERNAL_HD_FILES" +
    "SET MOVIES =\""+Movies.get(x)+"\" "
    +" WHERE ID = '"+x+"'";
    //System.out.println(qry);
    statement.executeUpdate(qry);

    }
    catch(SQLException e){}
    }




    }


    }


  2. #2
    Super Moderator pbrockway2's Avatar
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    Default Re: Can't get the Update statement to work

    Also at java-forums.org

  3. The Following User Says Thank You to pbrockway2 For This Useful Post:

    copeg (March 16th, 2012)

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