C++ vs Java constructors

Question

According to John C. Mitchell - Concepts in programming languages,

[...] Java guarantees that a constructor is called whenever an object is created.

Answer 1

even in the case we use statically allocated memory buffer for object creation , constructor is called.

can be seen in the following code snippet. i haven't seen any general case yet where constructor is not called, but then there is so much to be seen :)

include

using namespace std;

class Object

{

public:

Object();

~Object();

};

inline Object::Object()

{

cout << "Constructor\n";

};

inline Object::~Object()

{

cout << "Destructor\n";

};

int main()

{

char buffer[2 * sizeof(Object)];

Object *obj = new(buffer) Object; // placement new, 1st object

new(buffer + sizeof(Object)) Object; // placement new, 2nd object

// delete obj; // DON’T DO THIS

obj[0].~Object(); // destroy 1st object

obj[1].~Object(); // destroy 2nd object

}