Difference between instantiate object in class and in constructor of class?

Question

Is this a same thing? If not what is the difference? public class WhatEver{ SomeClass cl = new SomeClass(); //constructor public WhatEver(); } public class WhatEver{ //constructor public WhatEver() { SomeClass cl = new SomeClass(); } }

Kevin Aung · Answer

in the first one your cl is a member variable and every method in the class will have access to it. In the second one cl is only available to the scope of the constructor so other methods won't be able to access it. What I usually do is I declare the object as a member variable and instantiate it with new in the constructor. This way you could instantiate for different constructors public class classA { private classB m_myClass; public classA() { m_myClass = new classB(); } public classA(int Value) { m_myClass = new classB(Value); } }