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Thread: Delete data from inside the object

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    Default Delete data from inside the object

    can somebody tell me how to delete the data from inside the object ? if object contain the record of more than two students like id,name, etc. i have to delete this values from the object ? so how can i do that ?


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    Default Re: Delete data from inside the object

    What exactly do you mean when you say "delete this values"? Are you asking how to remove them from a databse? A text file? The code? Something else?

    It would be helpful if you provided an SSCCE demonstrating exactly what you're doing.
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    Default Re: Delete data from inside the object

    It all depends on how your object is setup. Does your object contain an array of students or a linked list of students or something completely different? It all depends on the stru/cture of your object on how you will be removing information from it.

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    Default Re: Delete data from inside the object

    Sir thank you for your reply i have created the list of the student List<Student> lstStudent = new ArrayList<Student>(); and i have added item in this list like id ,name etc.so i remove this item from the object.

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    Default Re: Delete data from inside the object

    Hello.
    Your question is ambiguous (unclear).
    Suppose you have collection say list. In this list you have added various objects of type Student. In a Student object you have id and name.
    Now tell us what do you want to delete.
    A Student object from the list or a field from student object such as id or name.
    If it is former then you can do it. But if it is latter then you cannot.

    Syed.

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    Default Re: Delete data from inside the object

    syed bhai thanks for your reply i want to delete the fields from the student object such as id or name etc.

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    Default Re: Delete data from inside the object

    I think we're confused by the word 'delete.' You can't change the structure of an existing class instance. For example if you have an instance of Student, student, that has fields, id, name, age, etc., you can't 'delete' those fields. You can change the value of those fields, including setting them to null or zero as appropriate. To do that:

    Obtain the desired student instance from the ArrayList of Student objects,
    Use the instance to set the fields as desired:

    student.setID( 0 );

    etc.

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    Default Re: Delete data from inside the object

    Thanks GregBrannon for your reply i tell you more specifically lets say i have student object s1 having id=101, name =mack fields.Your are right but i am talking about to delete the values present in those fields.so how can i delete those fields

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    Default Re: Delete data from inside the object

    Reread my post, starting with "To do that:"

    If there's something in the simple instructions I've given that you don't understand or don't know how to do, then ask specifics rather than general, ambiguous questions, like "How do I do that?" And please stop using the word, 'delete.' I think we've established that you can't delete, and you mean 'change.'

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    Default Re: Delete data from inside the object

    Are you asking how to remove a student with a specific set of values from the list?
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    Default Re: Delete data from inside the object

    not student object but ya i want to remove values from the object

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    Default Re: Delete data from inside the object

    Then I echo what has been said already: what you're asking doesn't make any sense. Why do you want to do this?
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    Default Re: Delete data from inside the object

    Thanks for all replying me and helping me i solved the problem

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    Default Re: Delete data from inside the object

    Quote Originally Posted by ankityadav View Post
    Thanks for all replying me and helping me i solved the problem
    How did you solve it? I'm pretty curious what the actual question was...
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