https://senac.blackboard.com/bbcswebdav/pid-2139349-dt-content-rid-42416805_1/courses/RS-20161-FSPOA-ALG-PRE-ADS2N16-1A/EX_Introducao_Java.pdf
https://senac.blackboard.com/bbcswebdav/pid-2139349-dt-content-rid-42416805_1/courses/RS-20161-FSPOA-ALG-PRE-ADS2N16-1A/EX_Introducao_Java.pdf