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 have a simple bash script called p to manage directory changing on
github.com/godzilla/bash-stuff
just put the script in your local bin directory (/usr/local/bin)
and put

alias p='. p'

in your .bashrc