Also, .oanda (like any folder with "." infront) is a hidden folder, so a regular file browser will hide it by default. You Linux home directory is likely full of folders like this. No biggy.
Java isn't installed, or isn't installed properly. Repeat the installing java steps in this tutorial and try again maybe..
The program 'java' can be found in the following packages:
which java
find / -type f -name java 2>/dev/null