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Can't choose class as main class in IntelliJ
I have a Java project in IntelliJ to which I just added a bunch of files in a nested folder hierarchy. Many of these files are tests and include the main method, so I should be able to run them. However I cannot figure out how to do this.
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What does the 'static' keyword do in a class?
...t inside it's own class? Sounds like a recursive nightmare to me but i'm a Java newbie.
– Matt Corby
Nov 5 '17 at 16:07
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When to use nested classes and classes nested in modules?
...instantiated without being bound to an upper level class. For instance, in Java,
class Car {
class Wheel { }
}
only methods in the Car class can create Wheels.
Ruby doesn’t have that behaviour.
In Ruby,
class Car
class Wheel
end
end
differs from
class Car
end
class Wheel
end
on...
What is the difference between bool and Boolean types in C#
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@Mikey I'm pretty sure that Java decided to use these aliases for consistency, and Microsoft decided to use Java for consistency... :-)
– max
Aug 19 '11 at 14:07
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what is the difference between XSD and WSDL
...s. For example, a company in Chicago might develop a web application using Java and another company in New York might develop an application in C# and when these two companies decided to share information then XML comes into picture. It helps to store and transport data between two different applica...
Why are private fields private to the type, not the instance?
... to lower mutual dependence of different pieces of code (classes in C# and Java), not different objects in memory.
For example, if you write code in one class that uses some fields in another class, then these classes are very tightly coupled. However, if you are dealing with code in which you hav...
Intellij IDEA generate for-each/for keyboard shortcut
...s. Type one of the following and hit "tab":
iter Iteration according to Java SDK 1.5 style
inst Check object type with instanceof and downcast it
itco Iterate elements of java.util.Collection
itit Iterate elements of java.util.Iterator
itli Iterate elements of java.util.List
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How to change a module variable from another module?
...erence to that symbol.
In other words, importing is NOT like an import in JAVA, external declaration in C/C++ or even a use clause in PERL.
Rather, the following statement in Python:
from some_other_module import a as x
is more like the following code in K&R C:
extern int a; /* import from...
TypeError: 'NoneType' object is not iterable in Python
...ier on, and pukes up a bunch of unrelated nonsense all over the carpet.
Java or C++ doesn't have these problems because such a program wouldn't be allowed to compile since you haven't defined what to do when None occurs. Python gives the programmer lots of rope to hang himself by allowing you to...
What is difference between functional and imperative programming languages?
...ct-oriented programming (OOP) languages such as C#, Visual Basic, C++, and Java were designed to primarily support imperative (procedural) programming, whereas Haskell/gofer like languages are purely functional. Can anybody elaborate on what is the difference between these two ways of programming?
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