I have a computer that was running Windows with a lot of big programas (like Adobe Fireworks, and many other stuff) and the computer performance was really good. I decided to format my computer (I didn't need all this programs because this computer had a different owner) and I installed Debian 8 Jessie (stable).
But since the first fresh installation, every program that needs Java to run (like NetBeans, Google Chrome, Atom (advanced text editor) or anyone) it starts consuming CPU progressively (checked via top command) until I have to reboot manually through the button (the computer is unusable, I can't open the menu and click on Power off).
I tried using different versions of Java (7 and 8) but nothing worked. Java 7 is installed through the official repositories and version-8 through Oracle downloads official site.
Any word of advice?
EDIT 1: Java version information
lrwxrwxrwx 1 root root 24 May 6 2014 default-java -> java-1.7.0-openjdk-amd64 lrwxrwxrwx 1 root root 20 Nov 7 01:58 java-1.7.0-openjdk-amd64 -> java-7-openjdk-amd64 -rw-r--r-- 1 root root 2439 Feb 7 21:22 .java-1.7.0-openjdk-amd64.jinfo drwxr-xr-x 5 root root 4096 Jan 11 18:54 java-6-openjdk-amd64 drwxr-xr-x 8 root root 4096 Feb 21 11:10 java-7-openjdk-amd64 drwxr-xr-x 9 root root 4096 Feb 3 08:56 jdk-8-oracle-x64 -rw-r--r-- 1 root root 2531 Feb 2 10:16 .jdk-8-oracle-x64.jinfo drwxr-xr-x 2 root root 4096 Feb 21 11:12 openjdk-7
Edit 2: Java performance
Also I've noticed via top command that Java process also consumes a lot of CPU (more than 200%).