Why I can't change directories using “cd”?

Question

I\'m trying to write a small script to change the current directory to my project directory:

#!/bin/bash
cd /home/tree/projects/java

I save

Answer 1

I got my code to work by using.

./ dose not work because it doesn't change your directory in the terminal it just changes the directory specific to that script.

Here is my program

#!/bin/bash 
echo "Taking you to eclipse's workspace."
cd /Developer/Java/workspace

Here is my terminal

nova:~ Kael$ 
nova:~ Kael$ . workspace.sh
Taking you to eclipe's workspace.
nova:workspace Kael$