```
@Scriptable
public final class Guid
extends Object
```
This class represents global universal IDs.
Instances of this class are immutable.

This class uses the SHAPRNG for secure random numbers and the SHA-1 algorithm for hashing to 20 bytes.

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`NULL`	A GUID string representation that contains only zeroes.
`static Guid`	`NULL_GUID`	The GUID that consists solely of zero bytes.
`static String`	`SHA1PRNG`	The algorithm used for generating GUIDs.
`static int`	`STRING_LENGTH`	The length of a GUID represented as a string.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static Guid`	`createInstance()`	Creates an instance of GUID using the SHAPRNG algorithm and the current system time.
`static Guid`	`createInstance(byte[]... p_randomBytes)`	Creates an instance of GUID using given random bytes.
`boolean`	`equals(Object p_obj)`
`byte[]`	`getBytes()`	Get the GUIDs `20` bytes.
`int`	`hashCode()`
`static boolean`	`isStringRepresentation(String p_str)`	Tests if the given string is a GUID representation.
`static void`	`seed()`	Initialize the random number generator.
`String`	`toString()`	Convert the GUID to a string.

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - NULL
```
public static final String NULL
```
    A GUID string representation that contains only zeroes.
    
    See Also:
    
    Constant Field Values
  - NULL_GUID
```
public static final Guid NULL_GUID
```
    The GUID that consists solely of zero bytes.
  - SHA1PRNG
```
public static final String SHA1PRNG
```
    The algorithm used for generating GUIDs.
    
    See Also:
    
    Constant Field Values
  - STRING_LENGTH
```
public static final int STRING_LENGTH
```
    The length of a GUID represented as a string.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - seed
```
public static void seed()
```
    Initialize the random number generator.
    This method should be called at most once per Java VM instance.
  - createInstance
```
public static Guid createInstance()
```
    Creates an instance of GUID using the SHAPRNG algorithm and the current system time.
    
    Returns:
    
    An initialized instance of Guid.
  - createInstance
```
public static Guid createInstance(byte[]... p_randomBytes)
```
    Creates an instance of GUID using given random bytes.
    
    Parameters:
    
    p_randomBytes - Random bytes that are used to create the GUID.
    
    Returns:
    
    An initialized instance of Guid.
  - getBytes
```
public byte[] getBytes()
```
    Get the GUIDs 20 bytes.
    
    Returns:
    
    A copy of this GUIDs bytes.
  - isStringRepresentation
```
public static boolean isStringRepresentation(String p_str)
```
    Tests if the given string is a GUID representation.
    
    Parameters:
    
    p_str - The string to test (may be null).
    
    Returns:
    
    true if the string is representing a GUID, false otherwise.
  - equals
```
public boolean equals(Object p_obj)
```
    Overrides:
    
    equals in class Object
  - toString
```
public String toString()
```
    Convert the GUID to a string.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    The string representation of the GUID.
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object

Class Guid

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NULL

NULL_GUID

SHA1PRNG

STRING_LENGTH

Method Detail

seed

createInstance

createInstance

getBytes

isStringRepresentation

equals

toString

hashCode