Hebrew doesn't have a hard-J sound. It is pronounced with a Y sound. "Joshua" is pronounced "yeh-ho-shu'-ah", "Jerusalem" is pronounced "yer-u-sha-lah'-im", etc. It's why we pronounce "Hallelujah" (which means "Praise Ya(hovah)/Ya(weh)") as "hah-lay-lu-yah" and not "hah-lay-lu-jeh".