関連ワード:  functional interface example java 8    functional interface in java 8 example javatpoint    example of functional interface in java 8 mcq    custom functional interface java 8 example    example of functional interface in java 8 arrays parallelsort    java 8 functional interface example mkyong    functional interface in java 8 real time example    supplier functional interface in java 8 example    consumer functional interface in java 8 example    predicate functional interface in java 8 example