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java.util
Class UUID

java.lang.Object
  extended by java.util.UUID
All Implemented Interfaces:
Serializable, Comparable<UUID>
public int clockSequence()
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UnsupportedOperationException
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[1877]UUID unit test
By Anonymous on 2007/04/27 18:26:03  Rate
import java.util.UUID;   
 import junit.framework.TestCase;   
  
  
 public class UUIDTest extends TestCase  {      
   public void testRandom (  )   {  
     UUID a = UUID.randomUUID (  ) ; 
     UUID b = UUID.randomUUID (  ) ; 
     assertFalse ( a.equals ( b )  ) ;    
    }      
    
   public void testVariant (  )   {  
     UUID a = UUID.randomUUID (  ) ; 
     assertEquals ( a.variant (  ) , 2 ) ;    
    }      
    
   public void testVersion (  )   {  
     UUID a1 = UUID.randomUUID (  ) ;  
     assertEquals ( a1.version (  ) , 4 ) ;   
     // here is a version 1 UUID plucked from my own HKLMSoftwareClasses 
     // for history of UUIDs ending in 444553540000      
     // http://blogs.msdn.com/oldnewthing/archive/2004/02/11/71307.aspx#71356 
     UUID a2 = UUID.fromString ( "d27cdb6e-ae6d-11cf-96b8-444553540000" ) ; 
     assertEquals ( a2.variant (  ) , 2 ) ; 
     assertEquals ( a2.version (  ) , 1 ) ; 
    }  
    
   public void testFromString (  )   {  
     String s = "d27cdb6e-ae6d-11cf-96b8-444553540000"; 
     UUID a = UUID.fromString ( s ) ; 
     assertEquals ( a.toString (  ) , s ) ;    
    }  
    
   public void testVersionFromCommonsTestCase (  )   {  
     // these UUIDs are from commons-id      
     UUID v1 = UUID.fromString ( "3051a8d7-aea7-1801-e0bf-bc539dd60cf3" ) ; 
     UUID v2 = UUID.fromString ( "3051a8d7-aea7-2801-e0bf-bc539dd60cf3" ) ; 
     UUID v3 = UUID.fromString ( "3051a8d7-aea7-3801-e0bf-bc539dd60cf3" ) ; 
     UUID v4 = UUID.fromString ( "3051a8d7-aea7-4801-e0bf-bc539dd60cf3" ) ; 
     //UUID v5 = UUID.fromString ( "3051a8d7-aea7-3801-e0bf-bc539dd60cf3" ) ; 
     assertEquals ( 1, v1.version (  )  ) ;      
     assertEquals ( 2, v2.version (  )  ) ;      
     assertEquals ( 3, v3.version (  )  ) ;      
     assertEquals ( 4, v4.version (  )  ) ;       
     // java.util.UUID doesn't support version 5 UUIDs while commons-id does      
     //assertEquals ( 5, v5.version (  )  ) ;    
    }    
  }  
 
public int compareTo(UUID val)
See Also:
Comparable, compareTo
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public boolean equals(Object obj)
See Also:
Hashtable, Object.hashCode()
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public static UUID fromString(String name)
See Also:
toString(), IllegalArgumentException
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public long getLeastSignificantBits()
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public long getMostSignificantBits()
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public int hashCode()
See Also:
Hashtable, Object.equals(java.lang.Object)
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public static UUID nameUUIDFromBytes(byte[] name)
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public long node()
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UnsupportedOperationException
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public static UUID randomUUID()
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public long timestamp()
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UnsupportedOperationException
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public String toString()
See Also:
Object
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public UUID(long mostSigBits,
            long leastSigBits)
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public int variant()
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public int version()
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