Private Static Int

Private Static Int
Java-SE1728: Slot 8. Class, Object,...
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Created: September-12, 2021 | Updated: October-02, 2021
Class variables, commonly known as static variables, are defined using the static keyword in a class but outside a method, constructor (default or parameterized), or block.
Private static variables are frequently utilized for constants. For example, many individuals prefer not to use constants in their code. Instead, they prefer to create a private static variable with a meaningful name and utilize it in their code, making the code more understandable.
If a variable is declared static, then the variable’s value is the same for all the instances, and we don’t need to create an object to call that variable.
In the above example, we created a static private variable and printed its value.
Let us understand an example to see the difference between a private and a private static variable.
The PersonB object changes the eye variable in the above example, but the leg variable remains the same. This is because a private variable copies itself to the method, preserving its original value. But a private static value only has one copy for all methods to share, thus changing its value changes the original value.
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Here we will see how to initialize the private static member variables initialization in C++. We can put static members (Functions or Variables) in C++ classes. For the static variables, we have to initialize them after defining the class.
To initialize we have to use the class name then scope resolution operator (::), then the variable name. Now we can assign some value.
The following code will illustrate the of static member initializing technique.
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#include

void func (){
int i = 0 ;
i ++ ;
printf ( "i = %d \n " , i );
}
int main (){
func ();
func ();
func ();
func ();
return 0 ;
}

#include

void func (){
static int i = 0 ;
i ++ ;
printf ( "i = %d \n " , i );
}
int main (){
func ();
func ();
func ();
func ();
return 0 ;
}

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int is a datatype for a variable storing integer values. static int is a variable storing integer values which is declared static .
If we declare a variable as static , it exists till the end of the program once initialized. For example, if we declare an int variable in a function, then that variable is a local variable for that function which gets destroyed as the function ends. But if we declare an int variable in a function also as static , then that variable will not get destroyed as the function ends and will not get destroyed until the program ends.
Let’s see two examples to understand it clearly.
Here, the int variable i is declared inside the function func() and thus is a local variable for that function. Every time the function gets called, i gets initialized, its value gets incremented to 1 and gets destroyed when the function ends.
Now lets see the same example with static int .
You will get this output : http://ideone.com/lThIoS
As you saw, on declaring the int variable as static , the variable did not get destroyed when the function ended. When the function was called the first time, the value of i became 1, second time it got incremented to 2 and so on.

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C# / Private and Static Constructors in C#

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This article describes Private and Static Constructors in C#. In general, a class has all of its constructors declared as public. While declaring the constructors of a class as public ensures that we can create its objects, sometimes we don’t require it. In other words, if we need to create a class in such a way that it should not be possible to instantiate it. So, we can do it by making its constructors private. However, still we can use the functionality of that class. In order to do so, we can create a method within the class that returns an instance of it. Also, we must declare that method as static. Because now we can’t have any instance of that class before that static method executes.
In case, a class contains only static methods, we must ensure that its instances should not exist. In this case, we either declare a constructor without an access modifier or explicitly declare the constructor as private. Hence, we can prevent that class to have instances. Since a class containing only static methods doesn’t exhibit a specific behavior. So we can avoid making its objects.
Basically, a static constructor initializes the static fields of a class.
The following program demonstrates the use of private constructors. Since the class FactorialFunctions contains only two static methods, it has a private constructor. Therefore, we can’t instantiate this class. In order to call the methods, we just need the class name and dot operator. Furthermore, the class named MyClass contains a constructor without any access modifier. Also, class A contains a constructor explicitly declared as private.
The following program demonstrates the use of a static constructor. While using a static constructor we must remember certain important points about it. Firstly, when the program executes, the static constructor runs first. Also, the static constructor executes only once. Further, a static constructor can’t take any argument. Therefore it can’t be overloaded. Also, it should not use any access modifier and can’t be inherited either.

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