Problem compiling and running java programs on Terminal

Hey guys:

I tried compiling my java program in Terminal (I used jEdit to write my code) but I received this:

vikram-babus-macbook-pro-2:java vikrambabu$ javac customerBill.java
customerBill.java:2: package corejava does not exist
import corejava.*;
^
...(i didn't include the other errors when compiling)

So I tried to play around with the core java package i installed (to my ability, im a beginner when it comes to coding :p) and I received this:

vikram-babus-macbook-pro-2:corejavabook vikrambabu$ jar xvf corejava.zip
java.io.FileNotFoundException: corejava.zip (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.io.FileInputStream.<init>(FileInputStream.java:66)
at sun.tools.jar.Main.run(Main.java:238)
at sun.tools.jar.Main.main(Main.java:1149)

So as of now, i can't compile/run any more complicated java programs that require me to use input/output code that requires the core java package. If anyone could help with my problem, i would greatly appreciate it!

Sorry if this is the wrong thread for this question...I wasn't exactly where to ask this because it seems like there aren't that many questions for Java programming on a mac

Message was edited by: vkb008