[SIZE=1][FONT=arial][FONT=arial][FONT=arial][FONT=arial]

export JAVA_HOME=/usr/java/j2re1.4.0_01
export PATH=$JAVA_HOME/bin:$PATH

Is /usr/java/j2re1.4.0_01 really the path to your java version?

To test type:

which java

Do you get any output?
If you get output, that should be what goes after JAVA_HOME.
In the second export command (PATH), is JAVA_HOME referenced as #JAVA_HOME or JAVA_HOME as the $, dollar sign, is needed in the second export line not the first.
In the second line, is $JAVA_HOME/bin followed directly by $PATH with no :, colon, or is it followed with a :, colon ($JAVA_HOME/bin:$PATH)?
It needs to be followed by a :, colon.

Did you make sure that when you exported JAVA_HOME, you made sure the cases matched? (As it is case sensitive --for the newbies)

I postulate that one of the above questions will answer and solve your problem.