java.util
Class LinkedList

java.lang.Object
  java.util.AbstractCollection
      java.util.AbstractList
          java.util.AbstractSequentialList
              java.util.LinkedList

All Implemented Interfaces:

Cloneable, Collection, List, Serializable

public class LinkedList

extends AbstractSequentialList

implements List, Cloneable, Serializable

JML's specification of java.util.LinkedList.

Author:

Katie Becker, Gary T. Leavens

Class Specifications

Specifications inherited from class AbstractList

protected initially this.modCount == 0;

Specifications inherited from class Object

represents objectState <- org.jmlspecs.lang.JMLDataGroup.IT; public represents _getClass <- \typeof(this);

Specifications inherited from interface List

instance public represents theCollection <- this.theList.toBag();

Specifications inherited from interface Collection

instance public invariant this.elementType == this.theCollection.elementType; instance public invariant this.containsNull == this.theCollection.containsNull; instance public invariant !this.nullElementsSupported ==> !this.containsNull;

Model Field Summary

 

Model fields inherited from class java.lang.Object

_getClass, objectState, theString

 

Model fields inherited from interface java.util.List

theList

 

Model fields inherited from interface java.util.Collection

addOperationSupported, elementState, nullElementsSupported, removeOperationSupported, theCollection

 

Ghost Field Summary

 

Ghost fields inherited from class java.lang.Object

objectTimesFinalized, owner

 

Ghost fields inherited from interface java.util.Collection

containsNull, elementType

 

Field Summary

 

Fields inherited from class java.util.AbstractList

modCount

 

Constructor Summary

LinkedList()

LinkedList(Collection c)

 

Model Method Summary

 

Model methods inherited from class java.lang.Object

hashValue

 

Model methods inherited from interface java.util.Collection

hashValue

 

Method Summary
void	add(int index, Object element)
boolean	add(nullable Object o)
boolean	addAll(int index, Collection c)
boolean	addAll(Collection c)
void	addFirst(Object o)
void	addLast(Object o)
void	clear()
Object	clone()
boolean	contains(nullable Object o)
Object	get(int index)
Object	getFirst()
Object	getLast()
int	indexOf(Object o)
int	lastIndexOf(Object o)
ListIterator	listIterator(int index)
Object	remove(int index)
boolean	remove(nullable Object o)
Object	removeFirst()
Object	removeLast()
Object	set(int index, Object element)
int	size()
Object[]	toArray()
Object[]	toArray(Object[] a)

 

Methods inherited from class java.util.AbstractSequentialList

iterator

 

Methods inherited from class java.util.AbstractList

equals, hashCode, listIterator, removeRange, subList

 

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty, removeAll, retainAll, toString

 

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

 

Methods inherited from interface java.util.List

containsAll, equals, hashCode, isEmpty, iterator, listIterator, removeAll, retainAll, subList

 

Constructor Detail

LinkedList

public LinkedList()

Specifications:

public normal_behavior
assignable theCollection;
ensures this.theList != null&&this.theList.isEmpty();

LinkedList

public LinkedList(Collection c)

Specifications:

public normal_behavior
requires c != null;
assignable theCollection;
ensures this.theList != null;
ensures org.jmlspecs.models.JMLEqualsSequence.convertFrom(c).equals(this.theList);

     also

public exceptional_behavior
requires c == null;
assignable theCollection;
signals_only java.lang.NullPointerException;

getFirst

public Object getFirst()

Specifications: pure

public normal_behavior
requires !this.theList.isEmpty();
ensures (\result == null)||\typeof(\result ) <: this.elementType;
ensures \result .equals(this.theList.itemAt(0));

     also

public exceptional_behavior
requires this.theList.isEmpty();
signals_only java.util.NoSuchElementException;

getLast

public Object getLast()

Specifications: pure

public normal_behavior
requires !this.theList.isEmpty();
ensures (\result == null)||\typeof(\result ) <: this.elementType;
ensures \result .equals(this.theList.itemAt((int)(this.theList.int_size()-1)));

     also

public exceptional_behavior
requires this.theList.isEmpty();
signals_only java.util.NoSuchElementException;

removeFirst

public Object removeFirst()

Specifications:

public normal_behavior
requires !this.theList.isEmpty();
assignable theCollection;
ensures \result .equals(\old(this.theList.itemAt(0)));
ensures this.theList.equals(\old(this.theList).removeItemAt(0));
ensures ((\result == null)||\typeof(\result ) <: this.elementType);

     also

public exceptional_behavior
requires this.theList.isEmpty();
assignable \nothing;
signals_only java.util.NoSuchElementException;

removeLast

public Object removeLast()

Specifications:

public behavior
requires !this.theList.isEmpty();
assignable theCollection;
ensures \result .equals(\old(this.theList.itemAt((int)(this.theList.int_size()-1))));
ensures this.theList.equals(\old(this.theList.removeItemAt((int)(this.theList.int_size()-1))));
ensures ((\result == null)||\typeof(\result ) <: this.elementType);

     also

public exceptional_behavior
requires this.theList.isEmpty();
assignable \nothing;
signals_only java.util.NoSuchElementException;

addFirst

public void addFirst(Object o)

Specifications:

public normal_behavior
assignable theCollection;
ensures this.theList.equals(\old(this.theList.insertFront(o)));
ensures_redundantly this.theList.itemAt(0).equals(o);

addLast

public void addLast(Object o)

Specifications:

public normal_behavior
assignable theCollection;
ensures this.theList.equals(\old(this.theList.insertBack(o)));
ensures_redundantly this.theList.itemAt((int)(this.theList.int_size()-1)).equals(o);

contains

public boolean contains(nullable Object o)

Specified by:

contains in interface List

Overrides:

contains in class AbstractCollection

Specifications: pure

Specifications inherited from overridden method in class AbstractCollection:
       pure

Specifications inherited from overridden method in interface List:
       pure

Specifications inherited from overridden method contains(Object o) in interface Collection:
       pure

public behavior
assignable \nothing;
ensures !this.containsNull&&o == null ==> !\result ;
ensures (o == null)||\typeof(o) <: this.elementType||!\result ;
ensures \result <==> this.theCollection.has(o);
signals_only java.lang.ClassCastException, java.lang.NullPointerException;
signals (java.lang.ClassCastException) (* \typeof(o) is incompatible with the elementType of this collection *);
signals (java.lang.NullPointerException) o == null;

size

public int size()

Specified by:

size in interface List

Specifications: pure

Specifications inherited from overridden method in class AbstractCollection:
       pure

Specifications inherited from overridden method in interface List:
       pure

Specifications inherited from overridden method in interface Collection:
       pure

public normal_behavior
assignable \nothing;
ensures \result == this.theCollection.int_size();
ensures \result >= 0;

add

public boolean add(nullable Object o)

Specified by:

add in interface List

Overrides:

add in class AbstractList

Specifications inherited from overridden method add(Object o) in class AbstractList:

     also

protected model_program { ... }

Specifications inherited from overridden method in class AbstractCollection:
      --- None ---

Specifications inherited from overridden method add(Object o) in interface List:

     also

public behavior
assignable theCollection;
ensures \result &&this.theList.equals(\old(this.theList).insertBack(o));

Specifications inherited from overridden method add(Object o) in interface Collection:

public behavior
requires !this.containsNull ==> o != null;
requires (o == null)||\typeof(o) <: this.elementType;
assignable theCollection;
ensures \result ==> this.theCollection.equals(\old(this.theCollection.insert(o)));
ensures \result &&\old(this.size() < 2147483647) ==> this.size() == \old(this.size()+1);
ensures !\result ==> this.size() == \old(this.size());
ensures !\result ==> \not_modified(theCollection);
ensures this.contains(o);
ensures_redundantly !\result ==> \old(this.contains(o));
signals_only java.lang.UnsupportedOperationException, java.lang.NullPointerException, java.lang.ClassCastException, java.lang.IllegalArgumentException;
signals (java.lang.UnsupportedOperationException) (* this does not support add *);
signals (java.lang.NullPointerException) (* not allowed to add null *);
signals (java.lang.ClassCastException) (* class of specified element prevents it from being added to this *);
signals (java.lang.IllegalArgumentException) (* some aspect of this element prevents it from being added to this *);

remove

public boolean remove(nullable Object o)

Specified by:

remove in interface List

Overrides:

remove in class AbstractCollection

Specifications inherited from overridden method in class AbstractCollection:
      --- None ---

Specifications inherited from overridden method remove(Object o) in interface List:

     also

public behavior
assignable theCollection;
ensures \result ==> this.theList.equals(\old(this.theList.removeItemAt(this.theList.indexOf(o))));

Specifications inherited from overridden method remove(Object o) in interface Collection:

public behavior
requires !this.containsNull ==> o != null;
requires (o == null)||\typeof(o) <: this.elementType;
assignable theCollection;
ensures \result ==> this.theCollection.equals(\old(this.theCollection.remove(o)));
ensures \result &&\old(this.size() <= 2147483647) ==> this.size() == \old(this.size()-1)&&this.size() < 2147483647&&this.size() >= 0;
ensures !\result ||\old(this.size() == 2147483647) ==> this.size() == \old(this.size());
signals_only java.lang.UnsupportedOperationException, java.lang.ClassCastException;
signals (java.lang.UnsupportedOperationException) (* this does not support remove *);
signals (java.lang.ClassCastException) (* the type of this element is not compatible with this *);

addAll

public boolean addAll(Collection c)

Specified by:

addAll in interface List

Overrides:

addAll in class AbstractCollection

Specifications inherited from overridden method in class AbstractCollection:
      --- None ---

Specifications inherited from overridden method in interface List:
      --- None ---

Specifications inherited from overridden method addAll(Collection c) in interface Collection:

public behavior
requires c != null;
requires c.elementType <: this.elementType;
requires !this.containsNull ==> !c.containsNull;
assignable theCollection;
ensures this.theCollection.equals(\old(this.theCollection).union(c.theCollection));
signals_only java.lang.UnsupportedOperationException, java.lang.ClassCastException, java.lang.IllegalArgumentException, java.lang.NullPointerException;
signals (java.lang.UnsupportedOperationException) (* this does not support addAll *);
signals (java.lang.ClassCastException) (* class of specified element prevents it from being added to this *);
signals (java.lang.IllegalArgumentException) (* some aspect of this element prevents it from being added to this *);
signals (java.lang.NullPointerException) (* argument contains null elements and this does not support null elements *);

     also

public exceptional_behavior
requires c == null;
assignable \nothing;
signals_only java.lang.NullPointerException;

addAll

public boolean addAll(int index,
                      Collection c)

Specified by:

addAll in interface List

Overrides:

addAll in class AbstractSequentialList

Specifications inherited from overridden method in class AbstractSequentialList:
      --- None ---

Specifications inherited from overridden method in class AbstractList:
      --- None ---

Specifications inherited from overridden method addAll(int index, Collection c) in interface List:

public behavior
requires c != null;
requires 0 <= index&&index <= this.size();
requires c.elementType <: this.elementType;
requires !this.containsNull ==> !c.containsNull;
assignable theCollection;
ensures \result ==> this.theList.equals(\old(this.theList.subsequence(0,index)).concat(org.jmlspecs.models.JMLEqualsSequence.convertFrom(c)).concat(\old(this.theList.subsequence(index,this.size()))));
signals_only java.lang.UnsupportedOperationException, java.lang.IllegalArgumentException;
signals (java.lang.UnsupportedOperationException) (* if this operation is not supported *);
signals (java.lang.IllegalArgumentException) (* if some aspect of c prevents its elements from being added to the list *);

     also

public exceptional_behavior
requires c == null||!(0 <= index&&index <= this.size())||!(c.elementType <: this.elementType)||(!this.containsNull&&c.containsNull);
assignable \nothing;
signals_only java.lang.UnsupportedOperationException, java.lang.ClassCastException, java.lang.NullPointerException, java.lang.IndexOutOfBoundsException;
signals (java.lang.ClassCastException) c != null&&!(c.elementType <: this.elementType);
signals (java.lang.NullPointerException) c == null;
signals (java.lang.IndexOutOfBoundsException) !(0 <= index&&index <= this.size());

clear

public void clear()

Specified by:

clear in interface List

Overrides:

clear in class AbstractList

Specifications inherited from overridden method in class AbstractList:

     also

protected model_program { ... }

Specifications inherited from overridden method in class AbstractCollection:
      --- None ---

Specifications inherited from overridden method in interface List:
      --- None ---

Specifications inherited from overridden method in interface Collection:

public behavior
assignable theCollection;
ensures this.theCollection.isEmpty();
ensures_redundantly this.size() == 0;
signals_only java.lang.UnsupportedOperationException;
signals (java.lang.UnsupportedOperationException) (* clear is not supported by this *);

get

public Object get(int index)

Specified by:

get in interface List

Overrides:

get in class AbstractSequentialList

Specifications: pure

Specifications inherited from overridden method in class AbstractSequentialList:
      --- None ---

Specifications inherited from overridden method in class AbstractList:
       pure

Specifications inherited from overridden method get(int index) in interface List:
       pure

public normal_behavior
requires 0 <= index&&index < this.size();
assignable \nothing;
ensures \result == this.theList.get(index);

     also

public exceptional_behavior
requires !(0 <= index&&index < this.size());
assignable \nothing;
signals_only java.lang.IndexOutOfBoundsException;

    implies_that

public normal_behavior
requires index >= 0;
ensures (\result == null)||\typeof(\result ) <: this.elementType;
ensures !this.containsNull ==> \result != null;

set

public Object set(int index,
                  Object element)

Specified by:

set in interface List

Overrides:

set in class AbstractSequentialList

Specifications inherited from overridden method in class AbstractSequentialList:
      --- None ---

Specifications inherited from overridden method set(int index, Object element) in class AbstractList:

     also

protected exceptional_behavior
requires \typeof(this) == \type(java.util.AbstractList);
assignable \nothing;
signals_only java.lang.UnsupportedOperationException;

Specifications inherited from overridden method set(int index, Object element) in interface List:

public behavior
requires !this.containsNull ==> element != null;
requires (element == null)||\typeof(element) <: this.elementType;

{|

requires 0 <= index&&index < this.size();
assignable theCollection;
ensures \result == (\old(this.theList.get(index)));
ensures this.theList.equals(\old(this.theList.subsequence(0,index)).insertBack(element).concat(\old(this.theList.subsequence(index+1,this.size()))));
signals_only java.lang.UnsupportedOperationException, java.lang.ClassCastException, java.lang.NullPointerException, java.lang.IllegalArgumentException;
signals (java.lang.UnsupportedOperationException) (* set method not supported by list *);
signals (java.lang.ClassCastException) (* class of specified element prevents it from being added to this *);
signals (java.lang.NullPointerException) (* element is null and null elements not supported by this *);
signals (java.lang.IllegalArgumentException) (* some aspect of element prevents it from being added to this *);

also

requires !(0 <= index&&index < this.size());
assignable \nothing;
ensures false;
signals_only java.lang.UnsupportedOperationException, java.lang.IndexOutOfBoundsException;

|}

add

public void add(int index,
                Object element)

Specified by:

add in interface List

Overrides:

add in class AbstractSequentialList

Specifications inherited from overridden method in class AbstractSequentialList:
      --- None ---

Specifications inherited from overridden method add(int index, Object element) in class AbstractList:

     also

protected exceptional_behavior
requires \typeof(this) == \type(java.util.AbstractList);
assignable \nothing;
signals_only java.lang.UnsupportedOperationException;

Specifications inherited from overridden method add(int index, Object element) in interface List:

public behavior
requires !this.containsNull ==> element != null;
requires (element == null)||\typeof(element) <: this.elementType;

{|

requires 0 <= index&&index <= this.size();
assignable theCollection;
ensures (element == null&&this.theList.get(index) == null)||(this.theList.get(index).equals(element))&&( \forall int i; 0 <= i&&i < index; (this.theList.get(i) == null&&\old(this.theList).get(i) == null)||this.theList.get(i).equals(\old(this.theList.get(i))))&&( \forall int i; index <= i&&i < \old(this.size()); (this.theList.get((int)(i+1)) == null&&\old(this.theList).get(i) == null)||this.theList.get((int)(i+1)).equals(\old(this.theList.get(i))));
signals_only java.lang.UnsupportedOperationException, java.lang.ClassCastException, java.lang.NullPointerException, java.lang.IllegalArgumentException;
signals (java.lang.UnsupportedOperationException) (* add method not supported by list *);
signals (java.lang.ClassCastException) (* class of specified element prevents it from being added to this *);
signals (java.lang.NullPointerException) (* element is null and null elements are not supported by this *);
signals (java.lang.IllegalArgumentException) (* some aspect of element prevents it from being added to this *);

also

requires !(0 <= index&&index <= this.size());
assignable \nothing;
ensures false;
signals_only java.lang.UnsupportedOperationException, java.lang.IndexOutOfBoundsException;

|}

remove

public Object remove(int index)

Specified by:

remove in interface List

Overrides:

remove in class AbstractSequentialList

Specifications inherited from overridden method in class AbstractSequentialList:
      --- None ---

Specifications inherited from overridden method remove(int index) in class AbstractList:

     also

protected exceptional_behavior
requires \typeof(this) == \type(java.util.AbstractList);
assignable \nothing;
signals_only java.lang.UnsupportedOperationException;

Specifications inherited from overridden method remove(int index) in interface List:

public behavior

{|

requires 0 <= index&&index < this.size();
assignable theCollection;
ensures \result == (\old(this.theList.get(index)));
ensures ( \forall int i; 0 <= i&&i < index; (this.theList.get(i) == null&&\old(this.theList).get(i) == null)||this.theList.get(i) == (\old(this.theList.get(i))))&&( \forall \bigint i; index <= i&&i < (\old(this.size()-1)); (this.theList.get((int)i) == null&&\old(this.theList).get((int)(i+1)) == null)||this.theList.get((int)i) == (\old(this.theList.get((int)(i+1)))));
signals_only java.lang.UnsupportedOperationException;
signals (java.lang.UnsupportedOperationException) (* remove method not supported by list *);

also

requires 0 <= index&&index < this.size();
assignable theCollection;
ensures (\result == null)||\typeof(\result ) <: this.elementType;
ensures !this.containsNull ==> \result != null;

also

requires !(0 <= index&&index < this.size());
assignable \nothing;
ensures false;
signals_only java.lang.UnsupportedOperationException, java.lang.IndexOutOfBoundsException;

|}

indexOf

public int indexOf(Object o)

Specified by:

indexOf in interface List

Overrides:

indexOf in class AbstractList

Specifications: pure

Specifications inherited from overridden method in class AbstractList:
       pure

Specifications inherited from overridden method indexOf(Object o) in interface List:
       pure

public behavior
requires !this.containsNull ==> o != null;
requires (o == null)||\typeof(o) <: this.elementType;
assignable \nothing;
ensures \result != -1&&this.theList.get(\result ) == null ==> o == null;
ensures \result != -1&&this.theList.get(\result ) != null ==> this.theList.get(\result ).equals(o)&&this.theList.indexOf(o) == \result ;
ensures \result == -1&&!this.contains(o);
signals_only java.lang.ClassCastException, java.lang.NullPointerException;
signals (java.lang.ClassCastException) (* class of specified element is incompatible with this *);
signals (java.lang.NullPointerException) (* element is null and null elements are not supported by this *);

    implies_that

ensures \result != -1 ==> ( \forall int i; 0 <= i&&i < \result ; (this.theList.get(i) == null&&o != null)||(this.theList.get(i) != null&&!this.theList.get(i).equals(o)));

lastIndexOf

public int lastIndexOf(Object o)

Specified by:

lastIndexOf in interface List

Overrides:

lastIndexOf in class AbstractList

Specifications: pure

Specifications inherited from overridden method in class AbstractList:
       pure

Specifications inherited from overridden method lastIndexOf(Object o) in interface List:
       pure

public behavior
requires !this.containsNull ==> o != null;
requires (o == null)||\typeof(o) <: this.elementType;
assignable \nothing;
ensures \result != -1&&this.theList.get(\result ) == null ==> o == null;
ensures \result != -1&&this.theList.get(\result ) != null ==> this.theList.get(\result ).equals(o)&&this.theList.reverse().indexOf(o) == this.theList.int_size()-(\result +1);
signals_only java.lang.ClassCastException, java.lang.NullPointerException;
signals (java.lang.ClassCastException) (* class of specified element is incompatible with this *);
signals (java.lang.NullPointerException) (* element is null and null elements are not supported by this *);

    implies_that

ensures \result != -1 ==> ( \forall int i; \result < i&&i < this.theList.int_size(); (this.theList.get(i) == null&&o != null)||(this.theList.get(i) != null&&!this.theList.get(i).equals(o)));

listIterator

public ListIterator listIterator(int index)

Specified by:

listIterator in interface List

Specified by:

listIterator in class AbstractSequentialList

Specifications: pure

Specifications inherited from overridden method in class AbstractSequentialList:
      --- None ---

Specifications inherited from overridden method in class AbstractList:
       pure

Specifications inherited from overridden method listIterator(int index) in interface List:
       pure non_null

public normal_behavior
requires 0 <= index&&index < this.size();
assignable \nothing;
ensures \result != null&&this.size() < 2147483647 ==> ( \forall int i; index <= i&&i < this.size(); \result .hasNext(i)&&\result .nthNextElement(i) == this.toArray()[i]);

     also

public exceptional_behavior
requires index < 0&&this.size() <= index;
signals_only java.lang.IndexOutOfBoundsException;

    implies_that

ensures \result .elementType == this.elementType;
ensures this.containsNull == \result .returnsNull;

clone

public Object clone()

Overrides:

clone in class Object

Specifications: pure

     also

public normal_behavior
ensures \result instanceof java.util.LinkedList&&\fresh(\result )&&((java.util.LinkedList)\result ).equals(this);
ensures_redundantly \result != this;

Specifications inherited from overridden method in class Object:
       non_null

protected normal_behavior
requires this instanceof java.lang.Cloneable;
assignable \nothing;
ensures \result != null;
ensures \typeof(\result ) == \typeof(this);
ensures (* \result is a clone of this *);

     also

protected normal_behavior
requires this.getClass().isArray();
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((java.lang.Object[])\result ).length == ((java.lang.Object[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((java.lang.Object[])this).length; ((java.lang.Object[])\result )[i] == ((java.lang.Object[])this)[i]);

     also

requires this.getClass().isArray();
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures java.lang.reflect.Array.getLength(\result ) == java.lang.reflect.Array.getLength(this);
ensures ( \forall int i; 0 <= i&&i < java.lang.reflect.Array.getLength(this); ( \exists java.lang.Object result_i; result_i == java.lang.reflect.Array.get(\result ,i); (result_i == null&&java.lang.reflect.Array.get(this,i) == null)||(result_i != null&&result_i.equals(java.lang.reflect.Array.get(this,i)))));

     also

protected exceptional_behavior
requires !(this instanceof java.lang.Cloneable);
assignable \nothing;
signals_only java.lang.CloneNotSupportedException;

     also

protected normal_behavior
requires \elemtype(\typeof(this)) <: \type(java.lang.Object);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((java.lang.Object[])\result ).length == ((java.lang.Object[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((java.lang.Object[])this).length; ((java.lang.Object[])\result )[i] == ((java.lang.Object[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(int);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((int[])\result ).length == ((int[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((int[])this).length; ((int[])\result )[i] == ((int[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(byte);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((byte[])\result ).length == ((byte[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((byte[])this).length; ((byte[])\result )[i] == ((byte[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(char);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((char[])\result ).length == ((char[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((char[])this).length; ((char[])\result )[i] == ((char[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(long);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((long[])\result ).length == ((long[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((long[])this).length; ((long[])\result )[i] == ((long[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(short);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((short[])\result ).length == ((short[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((short[])this).length; ((short[])\result )[i] == ((short[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(boolean);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((boolean[])\result ).length == ((boolean[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((boolean[])this).length; ((boolean[])\result )[i] == ((boolean[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(float);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((float[])\result ).length == ((float[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((float[])this).length; (java.lang.Float.isNaN(((float[])\result )[i])&&java.lang.Float.isNaN(((float[])this)[i]))||((float[])\result )[i] == ((float[])this)[i]);

     also

protected normal_behavior
requires \elemtype(\typeof(this)) == \type(double);
assignable \nothing;
ensures \elemtype(\typeof(\result )) == \elemtype(\typeof(this));
ensures ((double[])\result ).length == ((double[])this).length;
ensures ( \forall int i; 0 <= i&&i < ((double[])this).length; (java.lang.Double.isNaN(((double[])\result )[i])&&java.lang.Double.isNaN(((double[])this)[i]))||((double[])\result )[i] == ((double[])this)[i]);

toArray

public Object[] toArray()

Specified by:

toArray in interface List

Overrides:

toArray in class AbstractCollection

Specifications: pure

Specifications inherited from overridden method in class AbstractCollection:
       pure

Specifications inherited from overridden method in interface List:
       pure

     also

public normal_behavior
requires this.size() < 2147483647;
assignable \nothing;
ensures \result != null;
ensures \result .length == this.size();
ensures ( \forall int i; 0 <= i&&i < this.size(); \result [i].equals(this.theList.get(i)));

Specifications inherited from overridden method in interface Collection:
       pure non_null

public normal_behavior
requires this.size() < 2147483647;
assignable \nothing;
ensures \result != null;
ensures this.containsNull||\nonnullelements(\result );
ensures \result .length == this.size();

     also

public normal_behavior
ensures ( \forall int i; 0 <= i&&i < this.size(); this.theCollection.count(\result [i]) == org.jmlspecs.models.JMLArrayOps.valueEqualsCount(\result ,\result [i]));

toArray

public Object[] toArray(Object[] a)

Specified by:

toArray in interface List

Overrides:

toArray in class AbstractCollection

Specifications inherited from overridden method in class AbstractCollection:
      --- None ---

Specifications inherited from overridden method toArray(Object[] a) in interface List:

     also

public normal_behavior
old int colSize = this.theCollection.int_size();
old int arrSize = a.length;
requires a != null&&colSize < 2147483647;
requires this.elementType <: \elemtype(\typeof(a));
requires ( \forall java.lang.Object o; this.contains(o); \typeof(o) <: \elemtype(\typeof(a)));

{|

requires colSize <= arrSize;
assignable a[*];
ensures \result == a;
ensures ( \forall int k; 0 <= k&&k < colSize; this.theList.get(k) == \result [k]);
ensures ( \forall int i; colSize <= i&&i < arrSize; \result [i] == null);

also

requires colSize > arrSize;
assignable \nothing;
ensures \fresh(\result )&&\result .length == colSize;
ensures ( \forall int k; 0 <= k&&k < colSize; this.theList.get(k) == \result [k]);

|}

Specifications inherited from overridden method toArray(Object[] a) in interface Collection:
       non_null

public normal_behavior
old int colSize = this.theCollection.int_size();
old int arrSize = a.length;
requires a != null&&colSize < 2147483647;
requires this.elementType <: \elemtype(\typeof(a));
requires ( \forall java.lang.Object o; this.contains(o); \typeof(o) <: \elemtype(\typeof(a)));

{|

requires colSize <= arrSize;
assignable a[*];
ensures \result == a;
ensures ( \forall int k; 0 <= k&&k < colSize; this.theCollection.count(\result [k]) == org.jmlspecs.models.JMLArrayOps.valueEqualsCount(\result ,\result [k],colSize));
ensures ( \forall int i; colSize <= i&&i < arrSize; \result [i] == null);
ensures_redundantly \typeof(\result ) == \typeof(a);

also

requires colSize > arrSize;
assignable \nothing;
ensures \fresh(\result )&&\result .length == colSize;
ensures ( \forall int k; 0 <= k&&k < colSize; this.theCollection.count(\result [k]) == org.jmlspecs.models.JMLArrayOps.valueEqualsCount(\result ,\result [k],colSize));
ensures ( \forall int k; 0 <= k&&k < colSize; \result [k] == null||\typeof(\result [k]) <: \elemtype(\typeof(\result )));
ensures \typeof(\result ) == \typeof(a);

|}

     also

public exceptional_behavior
requires a == null;
assignable \nothing;
signals_only java.lang.NullPointerException;

     also

public behavior
requires a != null;
requires !( \forall java.lang.Object o; o != null&&this.contains(o); \typeof(o) <: \elemtype(\typeof(a)));
assignable a[*];
signals_only java.lang.ArrayStoreException;