HAORUO(SHAOCHILU) OCJP Oracle certified PROFESSIONAL Java programmer java is my "native language" in computer world I have two-year experience of studying java Now I am a qualified ORACLE JAVA programmer https://github.com/JavaOliverLu/java-daily/blob/master/ORACLE%20CERTIFIED%20PROFESSIONAL%20JAVA%20%20PROGRAMMER.pdf https://github.com/JavaOliverLu/java-daily/blob/master/eCertificate.pdf