Synchronized File

Question

i want write synchronized File Class, it extends File Class, it has
two new method "readfile"and"deletefile",
but deleting file must be afer reading file , if current directory has no
file, any of the two method is not allow to run.
anyone has idea?

Answer 1

Try this...
public synchronized void readFile(){
boolean check = checkFileExists();
if(!check){           
return;
doReadFile();
public synchronized void deleteFile(){
boolean check = checkFileExists();
if(!check){           
return;
doReadFile();
doDeleteFile();
// Below are not thread safe
// called only from either readFile() or deleteFile()
private boolean checkFileExists(){
// returns true if file exists, false otherwise
// called only from either readFile() or deleteFile()
private void doReadFile(){
// Read the file
// called only from either readFile() or deleteFile()
private void doDeleteFile(){
// Delete the file
Hope this helps