eu.gressly.util
Class BitWorm

java.lang.Object
  eu.gressly.util.BitWorm

All Implemented Interfaces:

java.io.Serializable

public class BitWorm
extends java.lang.Object
implements java.io.Serializable

Array of Bits with a simple interface: get() and put(). A 1-Bit is represented by the boolean value "true" (0 is represented by "false").

Author:

Philipp Gressly (phi@gressly.ch)

See Also:

Serialized Form

BitWorm

public BitWorm()

Generate a bitworm with an initial capacity of 32 bits.

BitWorm

public BitWorm(int initialCapacity)

Generate a BitWorm with a initial Capacity of bits. initalCapacity will be at least 1.

Parameters:

initialCapacity -

get

public boolean get(int pos)

Read a boolean from a given position. If the bit was not set already, or if the position is bigger than the size, "false" will be returned.

Parameters:

pos -

Returns:

true, iff the bit was set earlier.

set

public void set(int pos,
                boolean value)

Set Bit[pos] to 1 (true) or 0 (false) If a "true (1)"-Bit is set in a position higher (or same) as the size(), the size of the Bitworm will be enlarged.

Parameters:

pos - The first possible position is 0.

value - true for a 1 bit and false for a 0 bit

toString

public java.lang.String toString()

Human readable form of this BitWorm. 1 indicates "true", o indicates "false".

Overrides:

toString in class java.lang.Object

size

public int size()

Return the number of bits that have been assigned. The highes "true" bit that ever was assigned will be at position [size() - 1]. To remove that bit (seting to false) will NOT affect the size!

Returns:

return the number of bits in this worm.

toBooleanArray

public boolean[] toBooleanArray()

Return the bitWorm in a boolean[] representation (0 = false ; 1 = true)

Returns:

new boolean array.

main

public static void main(java.lang.String[] args)

Test Method

Parameters:

args - are not used