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Is it proper to implement java.util.Collection for a Grid class structure?


Is it proper to implement java.util.Collection for a Grid class structure?

By : user2951637
Date : November 18 2020, 11:13 AM
around this issue You can implement Collection, although it isn't a perfect fit. Since your grid is immutable (or is it only the grid size?), just throw an UnsupportedOperationException for any mutating call. Whether your Grid class should implement Collection depends on how you imagine it being used. There are pros and cons either way.
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Why does this exception occur: "java.util.MissingResourceException: Can't find resource for bundle java.util.Proper

Why does this exception occur: "java.util.MissingResourceException: Can't find resource for bundle java.util.Proper


By : user3863168
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Oh! I figured out the reason now. I was using the old mqji.properties file. The new file is already there in com.ibm.mq.jar, but was being ignored as old file was still available in my classpath. Now it works fine.
what is the proper way to implement the java Collection interface

what is the proper way to implement the java Collection interface


By : Drooka
Date : March 29 2020, 07:55 AM
Any of those help There are three ways to create a new collection:
From scratch. You implement all methods of the Collection interface. Extending an existing class, like you already mentioned. Java offers abstract classes for this purpose: java.util.AbstractCollection and various implementations for specific kinds of collection. These abstract classes allow you to focus on how the collections stores its elements instead of having to write all methods yourself. Composition. Your class is basically a wrapper for an existing collection class and redirects all its method calls (except for a few whose behavior you want to adapt) directly to the wrapped collection's methods.
How to properly implement java.util.Collection class ?

How to properly implement java.util.Collection class ?


By : Kolekar Amol
Date : March 29 2020, 07:55 AM
this one helps. You get this error because method T[] toArray(T[] arg0) takes a generic parameter of its own, which is independent of the generic parameter T of your class.
If you need both types T (of the class) and T (of the method) to be available inside toArray implementation, you need to rename one of these types. For example, Java reference implementations use E (for "element") as the generic type argument of collection classes:
code :
public class MyLinkedList<E>  implements Serializable, Iterable<E>, Collection<E>
{
    //some constructor here.  

    public <T> T[] toArray(T[] arg0)
    {
        return null;
    }
    ...
    // all other methods 
    ...
}
Is it possible to implement both scala.collection.Seq[T] and java.util.List[T] in one class

Is it possible to implement both scala.collection.Seq[T] and java.util.List[T] in one class


By : Haniel Cáceres Navar
Date : March 29 2020, 07:55 AM
should help you out It might be possible, but it's a lot of work, and some dirty operations can be involved.
You can't implement both types in Scala, because the Scala compiler is type safe. The Java compiler however, can still deal with leaving out generic type parameters.
Why doesn't java.util.Collection implement the new Stream interface?

Why doesn't java.util.Collection implement the new Stream interface?


By : LiveLove Laugh
Date : March 29 2020, 07:55 AM
hope this fix your issue Yes, there are excellent reasons for these decisions :)
The key is the difference between eager and lazy operations. The examples you give under the first question show eager operations where mapping or filtering a list produces a new list. There's nothing wrong with this, but it is often not what you want, because you're often doing way more work than you need; an eager operation must operate on every element, and produce a new collection. If you're composing multiple operations (filter-map-reduce), you're doing a lot of extra work. On the other hand, lazy operations compose beautifully; if you do:
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