Java .set()

The .set() method replaces the current entry in the underlying collection of a ListIterator object. This is the last item returned by the .next() or .previous() methods.

Syntax

myListIterator.set(value);

Where myListIterator is a ListIterator object, and value is the object to use in replacing the current element in the underlying collection.

Example

This example populates an ArrayList and then replaces the existing values in the collection:

import java.util.*;

public class Example {
  public static void main(String args[]) {
    // Create a new ArrayList
    ArrayList l = new ArrayList();

    // Add some items to the ArrayList
    l.add(1);
    l.add(2);
    l.add(3);
    l.add(4);
    l.add(5);

    System.out.println(l);

    ListIterator i = l.listIterator();

    // Loop through ArrayList contents
    while(i.hasNext()) {
      int item = (Integer) i.next();
      i.set(item * 2);
    }

    System.out.println(l);
  }
}

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This results in the following output:

[1, 2, 3, 4, 5]
[2, 4, 6, 8, 10]

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