From: Java-1.6.0.27 to Java-1.6.0.24
sudo apt-get install openjdk-6-jre=6b24-1.11.1-4ubuntu2 openjdk-6-jre-headless=6b24-1.11.1-4ubuntu2 icedtea-6-jre-cacao=6b24-1.11.1-4ubuntu2
When NetBeans 7.x version hangs up due to wrongly installed JAVA, which does not supports NetBeans.
