Thread: 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 ?

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.

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.

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.

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

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.

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

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.'

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

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