Java remove()
In this section, you will get the detailed explanation about the
remove()
method of interface Iterator. We are going to use remove()
method of interface Iterator in Java. The description of the code is given below for the usage of the method.
Description of the code:
Here, you will get to know about the remove() method through the following java program.
This method removes the last element returned by the iterator (optional
operation) from the collection. As per every call to next, this method can only
be called once. However, the iteration will continue other than by calling this method.
This method will throw UnsupportedOperationException if the
iterator doesn't support the remove operation and will throw IllegalStateException
if after the last call to the next method, the remove method has already been called.
In the program code given below, we have taken a list
of array that contains 0- 10 elements. Then with the help of hasNext()
method we will get next elements as output. And to remove any element from the
loop, we have applied remove() method which will remove that element
which gives 0 remainder in this iteration. Hence we get the following output.
Here is the code of program:
import java.util.*;
public class remove{
public static void main (String args[]){
ArrayList arr = new ArrayList();
System.out.println("Total elements of iterator: ");
for (int i = 1; i < 10; i++) arr.add(i);
int count = 0;
for (Iterator i = arr.iterator(); i.hasNext();){
System.out.println ("element is " + i.next());
}
System.out.println("After removing : ");
for (Iterator i = arr.iterator(); i.hasNext();){
count++;
i.next();
if (count%4 == 0) i.remove();
}
for (Iterator i = arr.iterator(); i.hasNext();){
System.out.println ("element is " + i.next());
}
}
}
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Output of the program:
C:\>cd unique
C:\unique>javac remove.java
C:\unique>java remove
Total elements of iterator:
element is 1
element is 2
element is 3
element is 4
element is 5
element is 6
element is 7
element is 8
element is 9
After removing :
element is 1
element is 2
element is 3
element is 5
element is 6
element is 7
element is 9
C:\unique> |
Download this example.
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Current Comments
1 comments so far (post your own) View All Comments Latest 10 Comments:Dear sir in this program you are creating object of ArrayList class and through you are adding items or values using add method. While add() method do not get integer type arguments so this program generating error: at arr.add(i);
add(int ,object);
add(object);
Posted by ayaz on Wednesday, 06.11.08 @ 00:53am | #62979