関連ワード:  why do we use interface in java    why do we need interface in java    why do we need functional interface in java    why do we need marker interface in java    why do we need functional interface in java 8    why do we use functional interface in java    why do we use runnable interface in java    why do we use serializable interface in java    why we should use interface in java    what is the point of interfaces in java  
結果 : why do we need to use interface in java