How much data can a List can hold at the maximum

Question

How much data can be added in java util List in Java at the maximum   Is there any default size of an ArrayList

User · Answer

The interface however defines the size   method  which returns an int   Returns the number of elements in this list  If this list contains more than Integer MAX VALUE elements  returns Integer MAX VALUE    So  no limit  but after you reach Integer MAX VALUE  the behaviour of the list changes a bit  ArrayList  which is tagged  is backed by an array  and is limited to the size of the array - i e  Integer MAX VALUE

User · Answer

It would depend on the implementation  but the limit is not defined by the List interface   The interface however defines the size   method  which returns an int       Returns the number of elements in this list   If this list contains more than Integer MAX VALUE elements  returns Integer MAX VALUE    So  no limit  but after you reach Integer MAX VALUE  the behaviour of the list changes a bit  ArrayList  which is tagged  is backed by an array  and is limited to the size of the array - i e  Integer MAX VALUE

User · Answer

Numbering an items in the java array should start from zero  This was i think we can have access to Integer MAX VALUE 1 an items

User · Answer

java util List is an interface  How much data a list can hold is dependant on the specific implementation of List you choose to use    Generally  a List implementation can hold any number of items  If you use an indexed List  it may be limited to Integer MAX VALUE or Long MAX VALUE   As long as you don t run out of memory  the List doesn t become  full  or anything

User · Answer

How much data can be added in java util List in Java at the maximum    This is very similar to Theoretical limit for number of keys  objects  that can be stored in a HashMap   The documentation of java util List does not explicitly documented any limit on the maximum number of elements  The documentation of List toArray however  states that         Return an array containing all of the elements in this list in proper sequence  from first to last element      would have trouble implementing certain methods faithfully  such as        so strictly speaking it would not be possible to faithfully implement this method if the list had more than 231-1   2147483647 elements since that is the largest possible array   Some will argue that the documentation of size          Returns the number of elements in this list  If this list contains more than Integer MAX VALUE elements  returns Integer MAX VALUE       indicates that there is no upper limit  but this view leads to numerous inconsistencies  See this bug report      Is there any default size an array list    If you re referring to ArrayList then I d say that the default size is 0  The default capacity however  the number of elements you can insert  without forcing the list to reallocate memory  is 10  See the documentation of the default constructor   The size limit of ArrayList is Integer MAX VALUE since it s backed by an ordinary array

User · Answer

see the code below of arraylist default it is 10 when u create  List l   new ArrayList        public class ArrayList lt E gt  extends AbstractList lt E gt  implements List lt E gt              Cloneable  Serializable  RandomAccess              private static final long serialVersionUID   8683452581122892189L             private transient int firstIndex             private transient int lastIndex             private transient E   array                              Constructs a new instance of   code ArrayList  with ten capacity                          public ArrayList                   this 10

User · Answer

As much as your available memory will allow   There s no size limit except for the heap

User · Answer

It depends on the List implementation  Since you index arrays with ints  an ArrayList can t hold more than Integer MAX VALUE elements  A LinkedList isn t limited in the same way  though  and can contain any amount of elements

[java] How much data can a List can hold at the maximum?

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