Problem in deleting Zip files unzipped using java.util.zip

Question

I have a static methos for unzipping a zip file. after unzipping the file when i am trying to delete that file using File.delete()its not getting deleted. but when methods like exist(). canRead(), canWrite() methods are returning true what can be the possible problem ? i had closed all the streams after unzipping operation Please go through the following code.
public static boolean unzipZipFile(String dir_name, String zipFileName) {
try {
ZipFile zip = new ZipFile(zipFileName);
Enumeration entries = zip.entries();
while (entries.hasMoreElements()) {
ZipEntry entry = (ZipEntry) entries.nextElement();
// got all the zip entries here
// now has to process all the files
// first all directories
// then all the files
if (entry.isDirectory()) {
// now the directories are created
File buf=new File(dir_name,entry.getName());
buf.mkdirs();
continue;
}// now got the dirs so process the files
entries = zip.entries();
while(entries.hasMoreElements()) {
// now to process the files
ZipEntry entry = (ZipEntry) entries.nextElement();
if (!entry.isDirectory()){
File buf=new File(dir_name,entry.getName());
copyInputStream(
zip.getInputStream(entry),
new BufferedOutputStream(
new FileOutputStream(buf)));}
} catch (IOException e) {
e.printStackTrace();
return false;
return true;
now i am trying to call this method to unzip a zip file
public static void main (String arg[]){
unzipZipFile("C:/temp","C:/tmp.zip");
java.io.File filer = new File("C:/tmp.zip");
System.out.println (filer.canRead());
System.out.println (filer.canWrite());
System.out.println (filer.delete());
Please tell me where my program is going wrong ?

Answer 1

Thanks .. the problem is solved... i was not closing the Zip file .. rather i was trying to close all the other streams that i used for IO operaion ... thanks a lot