Your intuition quite rightly tells you that there can be no more information content in one than the other, because they both have 32 bits. But that doesn’t mean we can’t use those bits to represent different values. Suppose I invent two new datatypes, uint4 and foo4. uint4 uses 4 bits to represent an integer, … Read more
unsigned is a modifier which can apply to any integral type (char, short, int, long, etc.) but on its own it is identical to unsigned int.
In C and C++ you have these least requirements (i.e actual implementations can have larger magnitudes) signed char: -2^07+1 to +2^07-1 short: -2^15+1 to +2^15-1 int: -2^15+1 to +2^15-1 long: -2^31+1 to +2^31-1 long long: -2^63+1 to +2^63-1 Now, on particular implementations, you have a variety of bit ranges. The wikipedia article describes this nicely.
my_var = (int)my_var; As simple as that. Basically you don’t need it if the variable is int.
#include <sstream> // st is input string int result; stringstream(st) >> result;
The first example (which compiles) is special because both operands of the addition are literals. A few definitions to start with: Converting an int to char is called a narrowing primitive conversion, because char is a smaller type than int. ‘A’ + 1 is a constant expression. A constant expression is (basically) an expression whose result is … Read more
You convert them with a type “conversion” var a int var b int64 int64(a) < b When comparing values, you always want to convert the smaller type to the larger. Converting the other way will possibly truncate the value: var x int32 = 0 var y int64 = math.MaxInt32 + 1 // y == 2147483648 … Read more
If you are using java 8 then you can still use the same syntax LocalDateTime fiveMinutesLater = LocalDateTime.now().plusMinutes(5)
Do you want to convert ints to chars?: int yourInt = 33; char ch = (char) yourInt; System.out.println(yourInt); System.out.println(ch); // Output: // 33 // ! Or do you want to convert ints to Strings? int yourInt = 33; String str = String.valueOf(yourInt); Or what is it that you mean?
In general, the heap memory used by a Java object in Hotspot consists of: an object header, consisting of a few bytes of “housekeeping” information; memory for primitive fields, according to their size (int n->32 bits) memory for reference fields (4 bytes each) (Integer n ->32 bits) padding: potentially a few “wasted” unused bytes after … Read more