Java Object Memory Allocation

Chapter: Miscellaneous Last Updated: 21-10-2016 13:07:43 UTC

Program:

            /* ............... START ............... */
                
class Test {
	// class contents
	void show() {
		System.out.println("Test::show() called");
	}
}

public class JavaObjectMemoryAllocation {

	public static void main(String[] args) {
		Test t = new Test(); // all objects are dynamically allocated
		t.show(); // No error
	}
}

                /* ............... END ............... */
        

Notes:

  • In Java, all objects are dynamically allocated on Heap. This is different from C++ where objects can be allocated memory either on Stack or on Heap. In C++, when we allocate abject using new(), the abject is allocated on Heap, otherwise on Stack if not global or static.
  • In Java, when we only declare a variable of a class type, only a reference is created (memory is not allocated for the object). To allocate memory to an object, we must use new().

Tags

Memory Allocation, Java, Miscellaneous

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