Question

Login.java

PortalHandler portalHandler = new PortalHandler(dataString);
...
public PortalHandler getPortalHandler(){
        return portalHandler;
    }

PortalHandler.java

public String getName()
{
return name;
}

ThirdClass.java I want to get to get the name in that instance created by login.java but following gives an null pointer error

Login login;
PortalHandler portalHandler = login.getPortalHandler();

How can it be done?

Answer 1

You need to initialize login like so: Login login = new Login().

That’s assuming of course that Login has a constructor that takes no arguments.

---

^{Edit in response to OP’s comment}

I think you’re looking to do something like this:

Login login = new Login();
login.doLoginStuff();
PortalHandler portalHandler = login.getPortalHandler();
// Do nothing with login from here on out

You can then do whatever you need to do with portalHandler and forget about login. But you have to initialize login with new Login() (or one of Login‘s constructors) before you can use it.