casting - Explanation of ClassCastException in Java - Stack Overflow
May 25, 2009 · Java allows us to cast variables of one type to another as long as the casting happens between compatible data types. For example you can cast a String as an Object and similarly an Object that contains String values can be cast to a String. Example. Let us assume we have an HashMap that holds a number of ArrayList objects. If we write code ...
c# - Why should casting be avoided? - Stack Overflow
Aug 1, 2013 · Casting from a derived to base class pointer/reference: This is so common and natural that the compiler will do it implicitly. If making it explicit increases readability, the cast is a step forwards, not backwards! Casting from a base to derived class pointer/reference: Also common, even in well-designed code. (Example: heterogeneous containers.)
What are the rules for casting pointers in C? - Stack Overflow
Jul 20, 2015 · Casting pointers is usually invalid in C. There are several reasons: Alignment. It's possible that, due to alignment considerations, the destination pointer type is not able to represent the value of the source pointer type. For example, if int * were inherently 4-byte aligned, casting char * to int * would lose the lower bits. Aliasing.
c++ - Proper way of casting pointer types - Stack Overflow
I used to think that reinterpret_cast is OK for e.g. casting pointers to and from integer types (like e.g. DWORD_PTR), but to cast from a void* to a BYTE*, isn't static_cast OK? Are there any (subtle?) differences in this particular case, or are they just both valid pointer casts?
casting - How do I convert a string to a number in PHP ... - Stack …
Dec 16, 2011 · Casting is very important in database operations, for instance. For example on a parameterized PDO query, there will be a struggle sometimes for the parser to realize it is a number and not a string, and then you end up with a 0 in an integer field because you did not cast the string to an int in the parameter step.
Choppy and pixelated picture when casting from Windows to TV …
Aug 9, 2023 · I am trying to cast (Windows + K) my laptop screen on my TV screen, and the picture is choppy and pixelated whenever there's motion on screen. My laptop is an LG Gram 17 with 16:10 aspect ratio. My TV
How can I convert a char to int in Java? - Stack Overflow
Casting is when we explicitly convert from one primitve data type, or a class, to another. Here's a brief ...
What is the cost of casting in Java? Is it a good idea to avoid it?
Oct 13, 2014 · Since down casting makes reference to the actual object, it can only be checked at run time. Down casting is not usually a performance issue anyway, (and is probably JVM dependent), but I believe that it might be possible to make it so via a pathological choice of inheritance structure. Especially in languages that allow multiple inheritance.
c# - Direct casting vs 'as' operator? - Stack Overflow
Sep 25, 2008 · Custom implicit/explicit casting: Usually a new object is created. Value Type Implicit: Copy without losing information. Value Type Explicit: Copy and information might be lost. IS-A relationship: Change reference type, otherwise throws exception. Same type: 'Casting is redundant'. It feels like the object is going to be converted into ...
Convert integer to string in Python - Stack Overflow
Jun 23, 2019 · Here is a simpler solution: one = "1" print(int(one)) Output console >>> 1 In the above program, int() is used to convert the string representation of an integer.