Class BooleanArray


  • public class BooleanArray
    extends java.lang.Object
    A resizable, ordered or unordered boolean array. Avoids the boxing that occurs with ArrayList. It is less memory efficient than BitSet, except for very small sizes. It more CPU efficient than BitSet, except for very large sizes or if BitSet functionality such as and, or, xor, etc are needed. If unordered, this class avoids a memory copy when removing elements (the last element is moved to the removed element's position).
    • Field Summary

      Fields 
      Modifier and Type Field Description
      boolean[] items  
      boolean ordered  
      int size  
    • Constructor Summary

      Constructors 
      Constructor Description
      BooleanArray()
      Creates an ordered array with a capacity of 16.
      BooleanArray​(boolean[] array)
      Creates a new ordered array containing the elements in the specified array.
      BooleanArray​(boolean ordered, boolean[] array, int startIndex, int count)
      Creates a new array containing the elements in the specified array.
      BooleanArray​(boolean ordered, int capacity)  
      BooleanArray​(int capacity)
      Creates an ordered array with the specified capacity.
      BooleanArray​(BooleanArray array)
      Creates a new array containing the elements in the specific array.
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void add​(boolean value)  
      void add​(boolean value1, boolean value2)  
      void add​(boolean value1, boolean value2, boolean value3)  
      void add​(boolean value1, boolean value2, boolean value3, boolean value4)  
      void addAll​(boolean... array)  
      void addAll​(boolean[] array, int offset, int length)  
      void addAll​(BooleanArray array)  
      void addAll​(BooleanArray array, int offset, int length)  
      void clear()  
      boolean[] ensureCapacity​(int additionalCapacity)
      Increases the size of the backing array to accommodate the specified number of additional items.
      boolean equals​(java.lang.Object object)
      Returns false if either array is unordered.
      boolean first()
      Returns the first item.
      boolean get​(int index)  
      int hashCode()  
      void insert​(int index, boolean value)  
      void insertRange​(int index, int count)
      Inserts the specified number of items at the specified index.
      boolean isEmpty()
      Returns true if the array is empty.
      boolean notEmpty()
      Returns true if the array has one or more items.
      boolean peek()
      Returns the last item.
      boolean pop()
      Removes and returns the last item.
      boolean random()
      Returns a random item from the array, or false if the array is empty.
      boolean removeAll​(BooleanArray array)
      Removes from this array all of elements contained in the specified array.
      boolean removeIndex​(int index)
      Removes and returns the item at the specified index.
      void removeRange​(int start, int end)
      Removes the items between the specified indices, inclusive.
      protected boolean[] resize​(int newSize)  
      void reverse()  
      void set​(int index, boolean value)  
      boolean[] setSize​(int newSize)
      Sets the array size, leaving any values beyond the current size undefined.
      boolean[] shrink()
      Reduces the size of the backing array to the size of the actual items.
      void shuffle()  
      void swap​(int first, int second)  
      boolean[] toArray()  
      java.lang.String toString()  
      java.lang.String toString​(java.lang.String separator)  
      void truncate​(int newSize)
      Reduces the size of the array to the specified size.
      static BooleanArray with​(boolean... array)  
      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait
    • Field Detail

      • items

        public boolean[] items
      • size

        public int size
      • ordered

        public boolean ordered
    • Constructor Detail

      • BooleanArray

        public BooleanArray()
        Creates an ordered array with a capacity of 16.
      • BooleanArray

        public BooleanArray​(int capacity)
        Creates an ordered array with the specified capacity.
      • BooleanArray

        public BooleanArray​(boolean ordered,
                            int capacity)
        Parameters:
        ordered - If false, methods that remove elements may change the order of other elements in the array, which avoids a memory copy.
        capacity - Any elements added beyond this will cause the backing array to be grown.
      • BooleanArray

        public BooleanArray​(BooleanArray array)
        Creates a new array containing the elements in the specific array. The new array will be ordered if the specific array is ordered. The capacity is set to the number of elements, so any subsequent elements added will cause the backing array to be grown.
      • BooleanArray

        public BooleanArray​(boolean[] array)
        Creates a new ordered array containing the elements in the specified array. The capacity is set to the number of elements, so any subsequent elements added will cause the backing array to be grown.
      • BooleanArray

        public BooleanArray​(boolean ordered,
                            boolean[] array,
                            int startIndex,
                            int count)
        Creates a new array containing the elements in the specified array. The capacity is set to the number of elements, so any subsequent elements added will cause the backing array to be grown.
        Parameters:
        ordered - If false, methods that remove elements may change the order of other elements in the array, which avoids a memory copy.
    • Method Detail

      • add

        public void add​(boolean value)
      • add

        public void add​(boolean value1,
                        boolean value2)
      • add

        public void add​(boolean value1,
                        boolean value2,
                        boolean value3)
      • add

        public void add​(boolean value1,
                        boolean value2,
                        boolean value3,
                        boolean value4)
      • addAll

        public void addAll​(BooleanArray array,
                           int offset,
                           int length)
      • addAll

        public void addAll​(boolean... array)
      • addAll

        public void addAll​(boolean[] array,
                           int offset,
                           int length)
      • get

        public boolean get​(int index)
      • set

        public void set​(int index,
                        boolean value)
      • insert

        public void insert​(int index,
                           boolean value)
      • insertRange

        public void insertRange​(int index,
                                int count)
        Inserts the specified number of items at the specified index. The new items will have values equal to the values at those indices before the insertion.
      • swap

        public void swap​(int first,
                         int second)
      • removeIndex

        public boolean removeIndex​(int index)
        Removes and returns the item at the specified index.
      • removeRange

        public void removeRange​(int start,
                                int end)
        Removes the items between the specified indices, inclusive.
      • removeAll

        public boolean removeAll​(BooleanArray array)
        Removes from this array all of elements contained in the specified array.
        Returns:
        true if this array was modified.
      • pop

        public boolean pop()
        Removes and returns the last item.
      • peek

        public boolean peek()
        Returns the last item.
      • first

        public boolean first()
        Returns the first item.
      • notEmpty

        public boolean notEmpty()
        Returns true if the array has one or more items.
      • isEmpty

        public boolean isEmpty()
        Returns true if the array is empty.
      • clear

        public void clear()
      • shrink

        public boolean[] shrink()
        Reduces the size of the backing array to the size of the actual items. This is useful to release memory when many items have been removed, or if it is known that more items will not be added.
        Returns:
        items
      • ensureCapacity

        public boolean[] ensureCapacity​(int additionalCapacity)
        Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many items to avoid multiple backing array resizes.
        Returns:
        items
      • setSize

        public boolean[] setSize​(int newSize)
        Sets the array size, leaving any values beyond the current size undefined.
        Returns:
        items
      • resize

        protected boolean[] resize​(int newSize)
      • reverse

        public void reverse()
      • shuffle

        public void shuffle()
      • truncate

        public void truncate​(int newSize)
        Reduces the size of the array to the specified size. If the array is already smaller than the specified size, no action is taken.
      • random

        public boolean random()
        Returns a random item from the array, or false if the array is empty.
      • toArray

        public boolean[] toArray()
      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object
      • equals

        public boolean equals​(java.lang.Object object)
        Returns false if either array is unordered.
        Overrides:
        equals in class java.lang.Object
      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object
      • toString

        public java.lang.String toString​(java.lang.String separator)