During a discussion one of my friend tell me that concrete methods would be allowed in java 1.8 in interfaces then at that time a question came into my mind i-e If they are allowed then How will we distinguish the methods.For example
I have two Interface Animal.java and Pet.java and both have same concrete method i-e eat()
public interfaces Animal{
void eat(){
System.out.println("Animal Start eating ....");
}
}
public interfaces Pet{
void eat(){
System.out.println("Pet Start eating ....");
}
}
Now my Zoo.java implement both of these and didn't override
public class Zoo() implements Pet , Animal{
//Now name method is a part of this class
}
Now here is my confusion.How can I call a specific method on inteface animal using Test object
public class Demo{
public static void main(String[] args){
Zoo zoo = new Zoo();
zoo.eat(); //What would be the output
}
}
Any suggestions? or is there any solution for this in java1.8 as I am unable to find its answer.
解決方案
You get a compile time error, unless you override eat in your Zoo class.
java: class defaultMethods.Zoo inherits unrelated defaults for eat() from types Pet and Animal
The latest and geatest jdk is here btw. And the syntax should be
default void eat(){
System.out.println("Animal Start eating ....");
}