asked on

help needed

Hello Experts,
Vector vec // contains some objects
Enumeration en=vec.elements();
while(en.hasMoreElements()){
Object obj=en.nextElement();
}
now the "obj" contains some values like 100 200 300 400...
Can you give me the code to remove a specific value from "obj".
Thanks

CEHJ

Vector vec // contains some objects
Iterator iter = vec.iterator();
while(iter.hasNext()) {
      if ("100".equals(iter.next())) {
            iter.remove();
      }
}

CEHJ

If you want to check a number of values, you can do:

                  Vector vec = new Vector(); // contains some objects
                  vec.add("150");
                  vec.add("100");
                  vec.add("400");
                  System.out.println(vec);
                  Iterator iter = vec.iterator();
                  Set toRemove = new HashSet(Arrays.asList(new String[] { "100", "150", "500" }));
                  while(iter.hasNext()) {
                        if (toRemove.contains(iter.next())) {
                              iter.remove();
                        }
                  }
                  System.out.println(vec);

sunshine737

ASKER

Iam not removing the duplicates , I should be able to remove particular element like element at 3 , so it should remove 300 from the obj of my vector.

CEHJ

vec.remove(3); // remove 4th item

sunshine737

ASKER

to say in detail
Object obj=en.nextElement(); // returns objects like obj1,obj2,obj3.......
I II III IV
obj1 contains 100 200 300 400
obj2 contains 500 600 700 800
obj3 contains 400 600 200 300
Now ,i want to remove the III element of each object ie 300 of obj1,700 of obj2 ,200 of obj3

Thanks

sunshine737

ASKER

>>vec.remove(3); // remove 4th item
removes the obj4
but i want to remove the element from obj(i).

CEHJ

If they're List then you can do:

List list = (List)iter.next();
list.remove(3);

CEHJ

>>Now ,i want to remove the III element ...

or in your case:

list.remove(2);

cmalakar

Convert the Object in vector to its corresponding Type (vector, List, Array....) then remove the particular element U want... !

CEHJ

>>Convert the Object in vector to its corresponding Type (vector, List, Array....) then remove the particular element U want... !

(Already posted an example of that)

sunshine737

ASKER

>> List list = (List)iter.next();
Throwing a run time Exception " java.lang.ClassCastException: java.lang.String " .

sunshine737

ASKER

Object obj=en.nextElement(); // returns objects like obj1,obj2,obj3
And obj1 contains different data elements like Strings , Int ,float ,and Date.....
If i convert the Object in vector to its corresponding Type (vector, List, Array....) then its Throwing a run time Exception " java.lang.ClassCastException: java.lang.String " .

ASKER CERTIFIED SOLUTION

aozarov

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CEHJ

>>Throwing a run time Exception " java.lang.ClassCastException: java.lang.String " .

If you don't have List as the type in the vector then just use the approach i suggested at first:

>>
if (toRemove.contains(iter.next())) {
iter.remove();
}
>>

If you have objects of various types in there, you just have to assign the correct type and value to 'toRemove'

sunshine737

ASKER

Hi,
Thanks for your help.
aozarov 's post is the exact solution for my Question , So iam awarding points to aozarov .
Thanks once again aozarov .

aozarov

:-)