Java 8: Interface with static methods instead of static util class

The main purpose of interfaces is to provide a type and a vocabulary of operations (methods) on that type. They’re useful and flexible because they allow multiple implementations, and indeed they are designed to allow implementations that are otherwise unrelated in the class hierarchy. The question asks, Is it right to have an interface that … Read more

Does C# support the use of static local variables?

No, C# does not support this. You can come close with: private static System.Text.RegularExpressions.Regex re = new System.Text.RegularExpressions.Regex(“\\(copy (\\d+)\\)$”); private static string AppendCopyToFileName(string f) { } The only difference here is the visibility of ‘re’. It is exposed to the classm not just to the method. The re variable will be initialized the first time … Read more

Why can’t I “static import” an “equals” method in Java?

The collision is actually with Object.equals(). All classes are inherited from Object and therefore have the Object.equals() method which leads to this collision. You’re importing by name, not by signature. You actually can’t import a static method named equals because of this. Or rather, you can import it, but not use it. I do agree … Read more

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