what is difference between constant readonly and static variables?
247223
Constant and ReadOnly keyword is used to make a field constant which value cannot be modified. The static keyword is used to make members static that can be shared by all the class objects.
903632
Difference is static variables are those variables: which allows a value to be retained from one call of the function to another. But in case of local variables the scope is till the block/ function lifetime. Local variables are non existent in the memory after the function termination.
78920
Static variables are indeed shared between threads, but the changes made in one thread may not be visible to another thread immediately, making it seem like there are two copies of the variable. ... Memory writes that happen in one thread can "leak through" and be seen by another thread, but this is by no means guaranteed.
912863
Local Variable: This variable has a scope local to the function. Volatile Variable: volatile just tells the compiler or force the compiler to "not to do the optimization" for that variable. ... Originally Answered: What is the Difference between a Local Varible and a Volatile variable declared in a same function?
419597
The key difference between a variable and a constant is: The value stored in a variable can/may change during the running of the program. The value stored in a constant cannot be changed during the running of the program.
875712
public means you can access it anywhere while private means you can only access it inside its own class. Just to note all private, protected or public modifier are not applicable to local variables in Java.
754254
Static variables are not thread safe. Instance variables do not require thread synchronization unless shared among threads. But, static variables are always shared by all the threads in the process. Hence, access to static variable is not thread safe.
1183493
A simple example for both: Use final : If you don't know what it's value will be at compile-time. For example, when you can need to get data from an API, this happens when running your code. Use const : If you are sure that a value isn't going to be changed when running your code.
614728
public means you can access it anywhere while private means you can only access it inside its own class. Just to note all private, protected or public modifier are not applicable to local variables in Java. a local variable can only be final in java.
412264
The difference between variables and constants is that the value stored in a variable can be changed at any time after it has been created. The value assigned to a constant, as the name suggests, cannot be changed once it has been declared an initialized.
1105645
Well, static variables are variables that belong to a whole class rather than to a single instance of that class. "Transient" is actually just a notation to be used by the serialization machinery; it means "don't serialize this member."
703343
A constant member is defined at compile time and cannot be changed at runtime. ... A readonly member is like a constant in that it represents an unchanging value. The difference is that a readonly member can be initialized at runtime, in a constructor, as well being able to be initialized as they are declared.
543150
Static libraries, while reusable in multiple programs, are locked into a program at compile time. ... In contrast, a dynamic library can be modified without a need to re-compile. Because dynamic libraries live outside of the executable file, the program need only make one copy of the library's files at compile-time.
239370
public − This is the access specifier that states that the method can be accesses publically. static − Here, the object is not required to access static members. void − This states that the method doesn't return any value.
1184161
['Local Variables.', 'Instance Variables.', 'Static Variables.']
458652
['Local Variables - Temporary Storage. ... ', 'Instance Variables - Staying with the Object. ... ', 'Static Variables - Storage for the Life of the Program.']
1262909
Basically, an int is read/write and a const int is read only. You use a const int for something that never changes value, such as a pin number. The advantage is less memory is used.