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Zip getCompressSize more efficient method ? Please ?  RSS feed

Mark Nicholas
Posts: 13
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Hi All,
I've got this method to determine the file size if I compress the file, I'm just wondering is there a better way ?
Also note that out.closeEntry(); must be called before you can obtain the size using getCompressSize() otherwise you get -1 ?
public static long getCompressSize(String file)
long compsize = 0;
byte[] buf = new byte[1024];
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(""));
FileInputStream in = new FileInputStream(file);
ZipEntry ze = new ZipEntry("dummy");
int len;
while ((len = > 0)
out.write(buf, 0, len);

// need to close the entry before
// you can obtain details
compsize = ze.getCompressedSize();
catch (FileNotFoundException e){}
catch (IOException e){}
return compsize;

[ August 20, 2002: Message edited by: Mark Nicholas ]
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