Modifier and Type	Class and Description
public static class	IntSet.IntSetIterator

Modifier and Type	Field and Description
pack-priv boolean	hasZeroValue
private transient IntSet.IntSetIterator	iterator1
private transient IntSet.IntSetIterator	iterator2
pack-priv int[]	keyTable
private final float	loadFactor
protected int	mask A bitmask used to confine hashcodes to the size of the table.
protected int	shift Used by `place(int)` to bit shift the upper bits of a `long` into a usable range (>= 0 and <= `mask`).
public int	size
private int	threshold

Access	Constructor and Description
public	IntSet() Creates a new set with an initial capacity of 51 and a load factor of 0.8.
public	IntSet(int The backing array size is initialCapacity / loadFactor, increased to the next power of two. initialCapacity) Creates a new set with a load factor of 0.8.
public	IntSet(int The backing array size is initialCapacity / loadFactor, increased to the next power of two. initialCapacity, float loadFactor) Creates a new set with the specified initial capacity and load factor.
public	IntSet(IntSet set) Creates a new set identical to the specified set.

Method Summary

Modifier and Type	Method and Description
public boolean	add(int key) Returns true if the key was added to the set or false if it was already in the set.
public void	addAll(IntArray array)
public void	addAll(IntArray array, int offset, int length)
public void	addAll(int... array)
public void	addAll(int[] array, int offset, int length)
public void	addAll(IntSet set)
private void	addResize(int key) Skips checks for existing keys, doesn't increment size, doesn't need to handle key 0.
public void	clear(int maximumCapacity) Clears the set and reduces the size of the backing arrays to be the specified capacity / loadFactor, if they are larger.
public void	clear()
public boolean	contains(int key)
public void	ensureCapacity(int additionalCapacity) Increases the size of the backing array to accommodate the specified number of additional items / loadFactor.
public boolean	equals(Object obj) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public int	first()
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.
public boolean	isEmpty() Returns true if the set is empty.
public IntSet.IntSetIterator	iterator() Returns an iterator for the keys in the set.
private int	locateKey(int key) Returns the index of the key if already present, else -(index + 1) for the next empty index.
public boolean	notEmpty() Returns true if the set has one or more items.
protected int	place(int item) Returns an index >= 0 and <= `mask` for the specified `item`.
public boolean	remove(int key) Returns true if the key was removed.
private void	resize(int newSize)
public void	shrink(int maximumCapacity) Reduces the size of the backing arrays to be the specified capacity / loadFactor, or less.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.
public static IntSet	with(int... array)

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll wait wait wait

Field Detail

hasZeroValue	back to summary
pack-priv boolean hasZeroValue

iterator1	back to summary
private transient IntSet.IntSetIterator iterator1

iterator2	back to summary
private transient IntSet.IntSetIterator iterator2

keyTable	back to summary
pack-priv int[] keyTable

loadFactor	back to summary
private final float loadFactor

mask	back to summary
protected int mask A bitmask used to confine hashcodes to the size of the table. Must be all 1 bits in its low positions, ie a power of two minus 1. If `place(int)` is overridden, this can be used instead of `shift` to isolate usable bits of a hash.

shift back to summary

shift	back to summary
protected int shift Used by `place(int)` to bit shift the upper bits of a `long` into a usable range (>= 0 and <= `mask`). The shift can be negative, which is convenient to match the number of bits in mask: if mask is a 7-bit number, a shift of -7 shifts the upper 7 bits into the lowest 7 positions. This class sets the shift > 32 and < 64, which if used with an int will still move the upper bits of an int to the lower bits due to Java's implicit modulus on shifts. `mask` can also be used to mask the low bits of a number, which may be faster for some hashcodes, if `place(int)` is overridden.

protected int shift

Used by place(int) to bit shift the upper bits of a long into a usable range (>= 0 and <= mask). The shift can be negative, which is convenient to match the number of bits in mask: if mask is a 7-bit number, a shift of -7 shifts the upper 7 bits into the lowest 7 positions. This class sets the shift > 32 and < 64, which if used with an int will still move the upper bits of an int to the lower bits due to Java's implicit modulus on shifts.

mask can also be used to mask the low bits of a number, which may be faster for some hashcodes, if place(int) is overridden.

size	back to summary
public int size

threshold	back to summary
private int threshold

Constructor Detail

IntSet	back to summary
public IntSet() Creates a new set with an initial capacity of 51 and a load factor of 0.8.

IntSet	back to summary
public IntSet(int initialCapacity) Creates a new set with a load factor of 0.8. Parameters initialCapacity:int The backing array size is initialCapacity / loadFactor, increased to the next power of two.

IntSet

back to summary

public IntSet(int initialCapacity)

Creates a new set with a load factor of 0.8.

Parameters

initialCapacity:int: The backing array size is initialCapacity / loadFactor, increased to the next power of two.

IntSet	back to summary
public IntSet(int initialCapacity, float loadFactor) Creates a new set with the specified initial capacity and load factor. This set will hold initialCapacity items before growing the backing table. Parameters initialCapacity:int The backing array size is initialCapacity / loadFactor, increased to the next power of two.

IntSet

back to summary

public IntSet(int initialCapacity, float loadFactor)

Creates a new set with the specified initial capacity and load factor. This set will hold initialCapacity items before growing the backing table.

Parameters

initialCapacity:int: The backing array size is initialCapacity / loadFactor, increased to the next power of two.

IntSet	back to summary
public IntSet(IntSet set) Creates a new set identical to the specified set.

Method Detail

add	back to summary
public boolean add(int key) Returns true if the key was added to the set or false if it was already in the set.

addAll	back to summary
public void addAll(IntArray array)

addAll	back to summary
public void addAll(IntArray array, int offset, int length)

addAll	back to summary
public void addAll(int... array)

addAll	back to summary
public void addAll(int[] array, int offset, int length)

addAll	back to summary
public void addAll(IntSet set)

addResize	back to summary
private void addResize(int key) Skips checks for existing keys, doesn't increment size, doesn't need to handle key 0.

clear	back to summary
public void clear(int maximumCapacity) Clears the set and reduces the size of the backing arrays to be the specified capacity / loadFactor, if they are larger.

clear	back to summary
public void clear()

contains	back to summary
public boolean contains(int key)

ensureCapacity	back to summary
public void ensureCapacity(int additionalCapacity) Increases the size of the backing array to accommodate the specified number of additional items / loadFactor. Useful before adding many items to avoid multiple backing array resizes.

equals back to summary

equals	back to summary
public boolean equals(Object obj) Overrides java.lang.Object.equals. Doc from java.lang.Object.equals. Indicates whether some other object is "equal to" this one. The `equals` method implements an equivalence relation on non-null object references: It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`. It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`. It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`. It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified. For any non-null reference value `x`, `x.equals(null)` should return `false`. An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

first	back to summary
public int first()

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

isEmpty	back to summary
public boolean isEmpty() Returns true if the set is empty.

iterator back to summary

iterator	back to summary
public IntSet.IntSetIterator iterator() Returns an iterator for the keys in the set. Remove is supported. If `Collections#allocateIterators` is false, the same iterator instance is returned each time this method is called. Use the `IntSetIterator` constructor for nested or multithreaded iteration.

public IntSet.IntSetIterator iterator()

Returns an iterator for the keys in the set. Remove is supported.

If Collections#allocateIterators is false, the same iterator instance is returned each time this method is called. Use the IntSetIterator constructor for nested or multithreaded iteration.

locateKey	back to summary
private int locateKey(int key) Returns the index of the key if already present, else -(index + 1) for the next empty index.

notEmpty	back to summary
public boolean notEmpty() Returns true if the set has one or more items.

place back to summary

place	back to summary
protected int place(int item) Returns an index >= 0 and <= `mask` for the specified `item`. The default implementation uses Fibonacci hashing on the item's `Object#hashCode()`: the hashcode is multiplied by a long constant (2 to the 64th, divided by the golden ratio) then the uppermost bits are shifted into the lowest positions to obtain an index in the desired range. Multiplication by a long may be slower than int (eg on GWT) but greatly improves rehashing, allowing even very poor hashcodes, such as those that only differ in their upper bits, to be used without high collision rates. Fibonacci hashing has increased collision rates when all or most hashcodes are multiples of larger Fibonacci numbers (see Malte Skarupke's blog post). This method can be overridden to customizing hashing. This may be useful eg in the unlikely event that most hashcodes are Fibonacci numbers, if keys provide poor or incorrect hashcodes, or to simplify hashing if keys provide high quality hashcodes and don't need Fibonacci hashing.

protected int place(int item)

Returns an index >= 0 and <= mask for the specified item.

The default implementation uses Fibonacci hashing on the item's Object#hashCode(): the hashcode is multiplied by a long constant (2 to the 64th, divided by the golden ratio) then the uppermost bits are shifted into the lowest positions to obtain an index in the desired range. Multiplication by a long may be slower than int (eg on GWT) but greatly improves rehashing, allowing even very poor hashcodes, such as those that only differ in their upper bits, to be used without high collision rates. Fibonacci hashing has increased collision rates when all or most hashcodes are multiples of larger Fibonacci numbers (see Malte Skarupke's blog post).

This method can be overridden to customizing hashing. This may be useful eg in the unlikely event that most hashcodes are Fibonacci numbers, if keys provide poor or incorrect hashcodes, or to simplify hashing if keys provide high quality hashcodes and don't need Fibonacci hashing.

remove	back to summary
public boolean remove(int key) Returns true if the key was removed.

resize	back to summary
private void resize(int newSize)

shrink	back to summary
public void shrink(int maximumCapacity) Reduces the size of the backing arrays to be the specified capacity / loadFactor, or less. If the capacity is already less, nothing is done. If the set contains more items than the specified capacity, the next highest power of two capacity is used instead.

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Satisfying this method's contract implies a non-`null` result must be returned.

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

with	back to summary
public static IntSet with(int... array)

com.badlogic.gdx.utils back to summary

public Class IntSet.IntSetIterator

Class Inheritance

extends Object

java.lang.Object
com.badlogic.gdx.utils.IntSet.IntSetIterator

Field Summary

Modifier and Type	Field and Description
pack-priv int	currentIndex
public boolean	hasNext
private static final int	INDEX_ILLEGAL
private static final int	INDEX_ZERO
pack-priv int	nextIndex
pack-priv final IntSet	set
pack-priv boolean	valid

Constructor Summary

Access	Constructor and Description
public	IntSetIterator(IntSet set)

Method Summary

Modifier and Type	Method and Description
pack-priv void	findNextIndex()
public int	next()
public void	remove()
public void	reset()
public IntArray	toArray() Returns a new array containing the remaining keys.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

currentIndex	back to summary
pack-priv int currentIndex

hasNext	back to summary
public boolean hasNext

INDEX_ILLEGAL	back to summary
private static final int INDEX_ILLEGAL

INDEX_ZERO	back to summary
private static final int INDEX_ZERO

nextIndex	back to summary
pack-priv int nextIndex

set	back to summary
pack-priv final IntSet set

valid	back to summary
pack-priv boolean valid

Constructor Detail

IntSetIterator	back to summary
public IntSetIterator(IntSet set)

Method Detail

findNextIndex	back to summary
pack-priv void findNextIndex()

next	back to summary
public int next()

remove	back to summary
public void remove()

reset	back to summary
public void reset()

toArray	back to summary
public IntArray toArray() Returns a new array containing the remaining keys.

public Class IntSet

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public Class IntSet.IntSetIterator

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail