Creating and running an alias in a current Powershell session works,
Windows PowerShell
Copyright (C) 2013 Microsoft Corporation. All rights reserved.
PS C:\Windows\system32> new-item alias:eadt -value "C:\adt-bundle-windows-x86_64-20140702\eclipse\eclipse.exe"
CommandType Name ModuleName
----------- ---- ----------
Alias eadt -> eclipse.exe
PS C:\Windows\system32> eadt
but fails in a new session:
PS C:\Windows\system32> eadt
eadt : The term 'eadt' is not recognized as the name of a cmdlet, function, script file, or operable program. Check
the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ eadt
+ ~~~~
+ CategoryInfo : ObjectNotFound: (eadt:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
PS C:\Windows\system32>