関連ワード:  how to use functional interface in java    how to use custom functional interface in java    how to create functional interface in java    how to implement functional interface in java    how to write functional interface in java    how to call functional interface in java    how to define functional interface in java    how to mock functional interface in java    how to declare functional interface in java    how to implement functional interface in java 8  
結果 : how to use functional interface in java