i have made an application in java...now i want to how can i make it secure ?

Question

i have used jdbc,sql,swing

Answer 1

Obfuscate it! ^_^

Answer 2

Is it networked? Better get it well tested for overflows if so. Once you've done that look to encrypt the channel to prevent injection attacks. Obfuscation helps, but hosting your code on your own server is the ultimate protection, if the channel is secured.

Answer 3

If you create an Android Java App.
You can try: Bg+ Anti Decompiler (JAVA)
It's free and powerful solution: https://play.google.com/store/apps/details?id=com.bgplus.Anti.JavaDecompiler

It supports a many protecting features:
- Normal features:
+ Remove comments
+ Obfuscate filename (include main-active class, which other tool can't do), class, functions, variable, ...
- Advandce features:
+ Obfuscate with unicode characters
+ Hide string value (helpful when you keep some sensitive info in java source)
+ Hide packagename
+ Add fakecode to trap the decompiler tools
+ Check resource-string (helpful when someone try to edit the resources of your APK)