関連ワード:  java 8 default methods interface    java 8 interface default method vs abstract class    java 8 override default method in interface    java 8 interface default method implementation example    java 8 interface default method multiple inheritance    java 8 default and static methods in interfaces    java 8 features default and static methods in interfaces    java 8 features streams lambdas functional interfaces default methods  
結果 : java 8 default methods interface