Create a zip archive in Java

Here's a Java class to zip up files in a directory. Thanks to the Java forum for their help in fixing some bugs.

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import java.io.File;

public class Zipper
{
private String _zipFilePath = "";
private String _imageFolderPath = "";
private String _zipFileName = "";
private static final int BUFFER = 20480;
private String _error = "";

public Zipper()
{
}

public void setZipFilePath(String path)
{
_zipFilePath = path;
}

public void setImageFolderPath(String path)
{
_imageFolderPath = path;
}

public String getError()
{
return _error;
}

public void zipEm()
{
File directory = new File(_imageFolderPath);

File files[] = directory.listFiles();

try {
 BufferedInputStream origin = null;
 FileOutputStream dest = new FileOutputStream(_zipFilePath);
 ZipOutputStream zip = new ZipOutputStream(new BufferedOutputStream(dest));

 byte data[] = new byte[BUFFER];

 File f = null;
 ZipEntry entry = null;
 FileInputStream fi = null;
 int count;

 // Iterate over the file list and add them to the zip file.
 for (int i=0; i <files.length; i++)
 {
   fi = new FileInputStream(files[i]);
   origin = new BufferedInputStream(fi, BUFFER);
   entry = new ZipEntry(files[i].getName());
   zip.putNextEntry(entry);

   while((count = origin.read(data,0,BUFFER)) != -1)
   {
     zip.write(data,0,count);
   }
   count = 0;
   origin.close();
 }
 zip.close();
}
catch (Exception e)
{
 // handle exception
 _error = e.getMessage();
}
}
}