I am unable to unzip the file to c:\sqlDeveloper. I have JDK installed already and JAVA_HOME is set. I don't think it is necessary to unzip the download. I tried 3 times already. I get a dialog saying "Invalid compressed data to extract". When I click Ok, i get another dialog "Would you like Winzip to try to continue with the next file?". I clicked "Yes". Then I get another dialog "Unable to find the local header for sqldeveloper\dataminer\dem...\StarSchemaMining.xml".
i get another dialog "Would you like Winzip to try to continue with the next file?". I clicked "Yes".Then I get another dialog "Unable to find the local header for sqldeveloper\dataminer\demos\cuec...\TextMining.xml".
I downloaded from http://www.oracle.com/technetwork/developer-tools/sql-developer/downloads/index.html
Downloads fine (with FireFox) for me and also unzips fine (with default Win Explorer extract, 7-Zip, or unzip.exe that ships with Oracle).
The zip file must be getting corrupted during download. If your internet connection is not stable, why not pick one of the available download managers? Check out the link to the Wikipedia article from here: