Gorgeous cucumber flowers, but unfortunately no cukes

種から育ったキュウリの花がきれいですが、実がなっていません。衆生は全部雄花だと言っています。それは可能でしょうか。花がたくさんあります。

The cucumbers I grew from seed had a lot of flowers. Unfortunately, there were no vegetables. Shu thinks maybe all my plants were male. Is that possible? At least they look good.