Coldfusion Randomizing Password

I had a problem when I needed to distribute an user name and password to each user registered in my application that written in Coldfusion. For security purpose, I needed to those password randomized before I send it. so, I was googling and found the interesting one. here you go.

 <cfset strLowerCaseAlpha = "abcdefghijklmnopqrstuvwxyz" />  
 <cfset strUpperCaseAlpha = UCase( strLowerCaseAlpha ) />   
 <cfset strNumbers = "0123456789" />  
 <cfset strOtherChars = "~!@##$%^&*" />  
 <cfset strAllValidChars = (strLowerCaseAlpha &strUpperCaseAlpha &strNumbers ) />   
 <cfset arrPassword = ArrayNew( 1 ) />  
 <cfset arrPassword[ 1 ] = Mid(strNumbers,RandRange( 1, Len( strNumbers ) ),1) />  
 <cfset arrPassword[ 2 ] = Mid(strLowerCaseAlpha,RandRange( 1, Len( strLowerCaseAlpha ) ),1) />  
 <cfset arrPassword[ 3 ] = Mid(strUpperCaseAlpha,RandRange( 1, Len( strUpperCaseAlpha ) ),1) />  
 <cfloop index="intChar" from="#(ArrayLen( arrPassword ) + 1)#" to="8" step="1">  
      <cfset arrPassword[ intChar ] = Mid(strAllValidChars,RandRange( 1, Len( strAllValidChars ) ),1) />   
 </cfloop>   
 <cfset CreateObject( "java", "java.util.Collections" ).Shuffle(arrPassword) />  
 <cfset strPassword = ArrayToList(arrPassword,"") />