Regarding private

[santhosh kumar vk]

Hi,

Could you please tell me how to access private variable in another class without using getter and setter.

Tanks,
Santhosh Kumar V.K

[Vishal Shaw]

Hi,

This is not possible unless the "another class" is an inner class

Vishal

[Henry Wong]

santhosh kumar vk wrote:Hi,

Could you please tell me how to access private variable in another class without using getter and setter.

Tanks,
Santhosh Kumar V.K

Private variables are private to the class (hence, the name). You can't access it directly from outside of the declared class.

You can only access private variable indirectly (such as using getters) or via the reflection library (then the security manager allows it, of course).

Henry

[Campbell Ritchie]

You can’t access private fields outside the class at all. A public getter method allow public access, but that is only indirect. It is impossible using ordinary programming.

[Nam Ha Minh]

santhos, you are asking an impossible thing.

[Azrael Noor]

In Reflection i am able to get few details of private variable, could we also get data of it ? need to hit with hammer more to get this but i think JDK kicks back

class privatesOfCarrabian
{
    private int a=10;
}
        
public class AceessPrivate {
    public static void main(String[] args) 
    {
        Field[] field = privatesOfCarrabian.class.getDeclaredFields();
        for(int i=0;i<field.length;i++)        
        {
            field[i].setAccessible(true);
            System.out.println("" + field[i].getName());
            System.out.println("" + field[i].getType());
        }
    }
    
}

[Steve Luke]

Azrael Noor wrote:In Reflection i am able to get few details of private variable, could we also get data of it ?

Like Henry said, it is possible to get the value from a private variable in a different class using reflection, but the Security Manager has to allow it - so you can't be sure it will always work unless you can also control the security manager the application runs in.

[Campbell Ritchie]

When I, earlier wrote: . . . ordinary programming.

… I meant not using reflection. You can cause no end of trouble by using reflection to circumvent somebody else’s programming style.

[Randall Twede]

as Vishal said, inner classes have direct access to private members of the outer class. another option is, if both classes are in the same package, make the member variable package access(no modifier) and give the "want's access class" a constructor that takes the "wanted class as a parameter.

[Henry Wong]

Azrael Noor wrote:In Reflection i am able to get few details of private variable, could we also get data of it ? need to hit with hammer more to get this but i think JDK kicks back

Well, have you tried the many other methods of the java.lang.reflect.Field class? Besides getName() and getType() that is.

Henry