End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
[Java] 파일 복사 http://tetzzang.com/java-%ed%8c%8c%ec%9d%bc-%eb%b3%b5%ec%82%ac/