What type of figurative language is I experienced the painful joy of love?

The phrase "I experienced the painful joy of love" employs oxymoron as its figurative language. An oxymoron combines contradictory terms—"painful" and "joy"—to convey complex emotions associated with love, highlighting how it can bring both happiness and suffering simultaneously. This juxtaposition deepens the emotional resonance of the statement, illustrating the multifaceted nature of love.