Java Abstract Methods
abstract-class, java
Solution
abstract String orderDescription()
{
return null;
}
should be
abstract String orderDescription();
As error says, your abstract method declaration shouldn't contain any body.
Above syntax mandates the implementation (which ever class extends the abstract class and provides implementation) to return a String.
You can't instantiate abstract class, so some class need to extend abstract class and provide implementation for this abstract method.
Example:
class MyabsClass
{
abstract String orderDescription();
}
class MyImplementation extends MyabsClass
{
public String orderDescription()
{
return "This is description";
}
}
class MyClient
{
public static void main(String[] args)
{
MyImplementation imple = new MyImplementation();
imple.orderDescription();
}
}
Problem
I am slightly confused with the keyword `abstract` here. My compiler is telling me that I am not allowed to have a body for a method that's abstract. However my assignment says: The abstract method orderDescription() returns a String giving details about a particular order. ``` abstract String orderDescription() { return null; } ``` However my code returns an error, as I mentioned above. So my question is what should I do for this problem? Up to now I've just removed the keyword abstract and it works fine.