関連ワード:  java class and interface difference    java abstract class and interface difference    abstract class and interface difference in java 8    difference between class and interface in java javatpoint    difference between class and interface in java with example    difference between class and interface in java in hindi    abstract class and interface difference with example in java    difference between class and interface in java geeksforgeeks    difference between class and interface in java in simple words    what are classes and interfaces in java