William Oliver Swofford, a singer who recorded the pop hits “Good Morning, Starshine” and “Jean” under the name Oliver, died Feb. 12 of cancer in Shreveport, La. He was 54.In 1969, Swofford climbed the pop charts with his recordings of “Starshine,” from the Broadway musical “Hair,” and the ballad “Jean.” “Starshine” reached No. 3 on the Billboard charts while “Jean” peaked at No. 2. He toured throughout the 1970s, leaving the music business in the 1980s to work in the home-construction and pharmaceutical industries. He is survived by his wife, a daughter, a son and a brother.