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  1. #1
    arc535 is offline Member
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    Default Access Specifiers

    This is a question I was asked in an interview: I have class A with private members and Class B extends A. I know private members of a class cannot be accessed, but the question is: I need to access private members of class A from class B, rather than create variables with the same value in class B.

    I hope I am clear with this question. Thanks.

  2. #2
    JosAH's Avatar
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    Default Re: Access Specifiers

    You just wrote it yourself: private members can't be accessed from another class, not even a sub-class. Your best bet is to supply a couple of (non-private) getXXX() methods in the first class.

    kind regards,

    Jos
    cenosillicaphobia: the fear for an empty beer glass

  3. #3
    arc535 is offline Member
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    Default Re: Access Specifiers

    I am not clear with u r answer. can u write a small prgm for me to understand more clearly.......with getXXX() methods.

  4. #4
    JosAH's Avatar
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    Default Re: Access Specifiers

    Suppose you have a private member variable myInt; add the following method to your class:

    Java Code:
    public int getMyInt() { return myInt; }
    kind regards,

    Jos
    cenosillicaphobia: the fear for an empty beer glass

  5. #5
    chipp's Avatar
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    Default Re: Access Specifiers

    just try to explain what josah's mean:

    for example:

    Java Code:
    class A {
    	int age;
    	char something;
    
    public:
    	void get_both() {
    		System.out.println (this.age + " years, and " + this.something);
    	}
    };
    
    class B {
    public:
    	//if you want to call the members of "an_a_variable"
    	void call_get_both(A an_a_variable) {
    		an_a_variable.get_both();
    	}
    };
    it's C++ actually... CMIIW anyway...

    edit:
    i didn't read this line

    I need to access private members of class A from class B, rather than create variables with the same value in class B.
    Last edited by chipp; 02-15-2012 at 05:13 PM.

  6. #6
    Tolls is online now Moderator
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    Default Re: Access Specifiers

    I was going to ask, why post C++ as an example...:)

  7. #7
    chipp's Avatar
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    Default Re: Access Specifiers

    haven't know java a lot...

  8. #8
    Tolls is online now Moderator
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    Default Re: Access Specifiers

    Ah, right.
    Just it might confuse someone new to the language posting stuff from a different one.
    You're right in that the concept is the same (well, if that was a getter rather than a printer), though.

  9. #9
    mkarthik90 is offline Member
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    Default Re: Access Specifiers

    You might use getter to access these variables.
    You cant access the private variables but still you can create a method in the CLASS A which uses the private variables.

    And this method can be accessed from the CLASS B.

  10. #10
    JosAH's Avatar
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    Default Re: Access Specifiers

    What is wrong with my first reply? Was it written in invisible ink again?

    kind regards,

    Jos
    cenosillicaphobia: the fear for an empty beer glass

  11. #11
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    Default Re: Access Specifiers

    Quote Originally Posted by mkarthik90 View Post
    You might use getter to access these variables.
    You cant access the private variables but still you can create a method in the CLASS A which uses the private variables.

    And this method can be accessed from the CLASS B.
    That exactly what Jos said at #4, so why repeat it?

    db
    If you're forever cleaning cobwebs, it's time to get rid of the spiders.

  12. #12
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    Default Re: Access Specifiers

    Quote Originally Posted by JosAH View Post
    What is wrong with my first reply? Was it written in invisible ink again?

    kind regards,

    Jos
    No, I could read it ... albeit a minute later than you could ;)

    db
    If you're forever cleaning cobwebs, it's time to get rid of the spiders.

  13. #13
    arc535 is offline Member
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    Default Re: Access Specifiers

    Thanks JosAH...i got it by using getter and setter methods.....

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