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Java Generics -> Function return type


Java Generics -> Function return type

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Java Generics -> Function return type
Tag : java , By : DK.
Date : November 24 2020, 03:41 PM


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Java Generics: Generic type defined as return type only


Tag : java , By : user161380
Date : March 29 2020, 07:55 AM
this will help The method returns a type of whatever you expect it to be ( is defined in the method and is absolutely unbounded).
This is very, very dangerous as no provision is made that the return type actually matches the returned value.

Java - Overriding return type of extended interface when return type uses generics for own method parameter types


Tag : java , By : Dasharath Yadav
Date : March 29 2020, 07:55 AM
To fix this issue
A basic idea is now to change this generic return type from GenericType in Interface A into GenericType in Interface A1

Java- Using generics to return more than one type


Tag : java , By : chad
Date : March 29 2020, 07:55 AM
wish help you to fix your issue There are a number of approaches you could take. One is to use Class as others have suggested. Another would be to create some sort of producer interface, and pass that in:
public interface FruitProducer<T> {
    T createFruit(String arg);
}

public <T> List<T> returnFruits(String arg, FruitProducer<? extends T> producer) {
    List<T> list = new ArrayList<T>();
    T fruit = producer.createFruit(arg);
    list.add(fruit);
    return list;
}
public abstract class FruitLister<T> {
    public abstract List<T> returnFruits(String arg);
}
public class AppleLister implements FruitLister<Apple> {
    @Override
    public List<Apple> returnFruits(String arg) {
            List<Apple> list = new ArrayList<Apple>();
            Apple apple = new Apple(arg);
            list.add(apple);
            return list;
    }
}

New to Java Generics - why is there a Type for a return type of void in Generics?


Tag : java , By : Adam Hill
Date : March 29 2020, 07:55 AM
seems to work fine The isn't a return type. It is declaring that U is a generic class that will be used in the method's parameters and in the method body.
You can read more about generic methods and their syntax here.

Java Generics : cant call a function with said generics even though type matches


Tag : java , By : Janko
Date : March 29 2020, 07:55 AM
Hope that helps The problem is at line 7, you are creating new Config and call setSections on the same line.
So the solutions are two:
Config<String> config = new Config<String>().setSections(sections);
Config<String> config = new Config<>();
conf.setSections(sections);
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