microedition.io probleb

[stud]

I'm trying to compile this code;

import java.io.*;
import java.util.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;

public class Connection
implements HttpPosterListener
{

private final String proxyUrl;
private final HttpPoster poster;
private DBListener listener = null;
..........etc.
every time I get an error messagr like this;

package javax.microedition.io does not exist
package javax.microdition.lcdui does not.....
how & where can I obtain this classes?