messenger4j
                                A Java library for building Chatbots on the Facebook Messenger Platform - easy and fast.
                            
                        How to download and setup messenger4j
Open terminal and run command
                                            git clone https://github.com/messenger4j/messenger4j.git
                                        
                                        git clone is used to create a copy or clone of messenger4j repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with messenger4j https://github.com/messenger4j/messenger4j/archive/master.zip
Or simply clone messenger4j with SSH
                                            [email protected]:messenger4j/messenger4j.git                                    
                                    If you have some problems with messenger4j
You may open issue on messenger4j support forum (system) here: https://github.com/messenger4j/messenger4j/issuesSimilar to messenger4j repositories
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