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

On my particular case i needed too many times to change for the same directory. So on my .bashrc (I use ubuntu) i've added the

1 -

$ nano ~./bashrc

 function switchp
 {
    cd /home/tree/projects/$1
 }

2-

$ source ~/.bashrc

3 -

$ switchp java

Directly it will do: cd /home/tree/projects/java

Hope that helps!