list.clear() vs list = new ArrayList(); [duplicate]

by

It’s hard to know without a benchmark, but if you have lots of items in your ArrayList and the average size is lower, it might be faster to make a new ArrayList.

http://www.docjar.com/html/api/java/util/ArrayList.java.html

public void clear() {
    modCount++;

    // Let gc do its work
    for (int i = 0; i < size; i++)
        elementData[i] = null;

    size = 0;
}

More Related Contents:

  1. How to convert ArrayList to String[][]?
  2. How to move elements of Java ArrayList to file in java [closed]
  3. ArrayList with 2 dimensions [closed]
  4. Initialization of an ArrayList in one line
  5. How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterating it? [duplicate]
  6. How to create a Multidimensional ArrayList in Java?
  7. make arrayList.toArray() return more specific types
  8. List versus ArrayList as reference type?
  9. Distinction between the capacity of an array list and the size of an array
  10. Understand Arraylist IndexOutOfBoundsException in Android
  11. How can I calculate the difference between two ArrayLists?
  12. Time complexity for java ArrayList
  13. How to create an 2D ArrayList in java? [duplicate]
  14. In Java 8, why is the default capacity of ArrayList now zero?
  15. Java ArrayList replace at specific index
  16. What is a List vs. an ArrayList? [duplicate]
  17. Remove objects from an ArrayList based on a given criteria
  18. Most efficient way to see if an ArrayList contains an object in Java
  19. Load arrayList data into JTable
  20. Using contains on an ArrayList with integer arrays
  21. ArrayList contains case sensitivity
  22. What is the Simplest Way to Reverse an ArrayList?
  23. Create an ArrayList with multiple object types?
  24. Java ArrayList Contain always return false although it contain the same value
  25. Sorting ArrayList of Objects by Object attribute
  26. Converting an ArrayList into a 2D Array
  27. How to change value of ArrayList element in java
  28. In Java, can you modify a List while iterating through it?
  29. How to merge two ArrayLists without duplicates? [duplicate]
  30. Add ArrayList to another ArrayList in java

Leave a Comment