No, it does not... according to the FAQs on the main John Hopkins University website...
"Does Johns Hopkins offer Early Action or rolling admission?
Admission is only offered through the Early Decision and Regular Decision processes."
http://www.jhu.edu/~admis/faqs/ed.html
John Hopkins - writer - was born in 1931.
John Hopkins - writer - died in 1998.
John Hopkins Harney was born in 1806.
John Hopkins Harney died in 1868.
John Hopkins the Third was created in 1921.
John Henry Hopkins died in 1868.
John Henry Hopkins was born in 1792.
John Driskell Hopkins is 6' 1".
John Hopkins was born on May 22, 1983.
John Hopkins Worcester has written: 'Womanhood'
John Driskell Hopkins goes by Hop.
Johns Hopkins was born on May 19, 1795.