関連ワード:  flatmap and map difference in java 8    difference between map and flatmap in java 8 with example    what is difference between map and flatmap in java 8 streams api    what is the difference between map () and flatmap () in java 8 streams    map vs flatmap java 8    map vs flatmap java 8 example    when to use map and flatmap in java 8  
結果 : flatmap and map difference in java 8