I ended up screwing up my terminal, while setting up Sbt for the Coursera Scala course. I can't summon gedit (or anything else) anymore. I get the following error:

Command 'gedit' is available in '/usr/bin/gedit'
The command could not be located because '/usr/bin' is not included in the PATH environment variable.

Also, each new instance of Terminal writes these messages before any command is written:

-bash: :/home/antonio/jdk7/jdk1.7.0_07/bin: No such file or directory
-bash: export: `/home/antonio/Desktop/Scala/install/sbt/bin:/home/antonio/jdk7/jdk1.7.0_07/bin': not a valid identifier

I recently did a manual installation of the jdk 7, which apparently works:

java -version
java version "1.7.0_07"
Java(TM) SE Runtime Environment (build 1.7.0_07-b10)
Java HotSpot(TM) 64-Bit Server VM (build 23.3-b01, mixed mode)

While setting up Sbt, I made the mistake of editing bashrc by writing gedit ~/.bashrc on my terminal instead of writing gedit .bashrc, I wrote the following lines at the end of the bashrc file that opened:

export PATH=/PATH/TO/YOUR/jdk1.7.0-VERSION/bin:$PATH
export PATH=/home/antonio/jdk7/jdk1.7.0_07/bin:$PATH

What is wrong here? How can I access my bashrc file and modify it again?