How to modify a Collection while iterating using for-each loop without ConcurrentModificationException? [duplicate]

by

Use Iterator#remove.

This is the only safe way to modify a collection during iteration. For more information, see The Collection Interface tutorial.

If you also need the ability to add elements while iterating, use a ListIterator.

More Related Contents:

  1. Why is a ConcurrentModificationException thrown and how to debug it
  2. When to use LinkedList over ArrayList in Java?
  3. Java 8 Distinct by property
  4. How can I turn a List of Lists into a List in Java 8?
  5. How to convert int[] into List in Java?
  6. How can I initialise a static Map?
  7. How to count the number of occurrences of an element in a List
  8. Which is more efficient, a for-each loop, or an iterator?
  9. Which Java Collection should I use?
  10. Convert an array of primitive longs into a List of Longs
  11. Is there a common Java utility to break a list into batches?
  12. How can I convert int[] to Integer[] in Java?
  13. Sorted collection in Java
  14. How can I sort a List alphabetically?
  15. Why can Java Collections not directly store Primitives types?
  16. Immutable vs Unmodifiable collection [duplicate]
  17. Identify duplicates in a List
  18. Removing items from a list [duplicate]
  19. Collection Interface vs arrays
  20. How to remove element from ArrayList by checking its value?
  21. Most efficient Java primitive collections library [closed]
  22. Google Guava vs. Apache Commons [closed]
  23. What is the fastest Java collection with the basic functionality of a Queue?
  24. Remove empty collections from a JSON with Gson
  25. Map that could be iterated in the order of values
  26. Why does TreeSet throw a ClassCastException?
  27. Shortcut for adding to List in a HashMap
  28. ArrayList vs. Vectors in Java if thread safety isn’t a concern
  29. How does ConcurrentHashMap work internally?
  30. Vector vs Collections.synchronizedList(ArrayList)

Leave a Comment