i'm trying to Implement Google,facebook and email sign-in in my project, i have completed google sign in,now im trying to work on facebook.so i started with registering through Facebook developer portal and was following the steps which it showed me but i'm stuck in the 4th step which is this:
I tired running that command in my terminal but it displays like this:
I have java installed in Computer but i don't know what's the other two requirements for running that command,can someone tell me how can i fix this.

