Don't we need java or c programming for hacking?

Answer 1

Hacking what? Hacking is a word too general.

The most exploits are written in C, C++, Python and Ruby... or Assembly, it depends on what you need to do. If you are a beginner, start with Python, then learn Metasploit framework and Linux OS.

Answer 2

Use HTML (Hyper Text Markup Language) JavaScript and SQL(Structured Query Language). that's the languages you want for hacking.
for web application hacking anyway.