ParameterAware Issue

[alley sys]

Hi,
 I am implemnting ParameterAware to get my request parameters: 
I can see the request parameter is a String of Array([Ljava.lang.String;)
But I can't get the value out of it .
I used 
 
String[] par = (String[])parameters.get("par");
System.out.println(par[0]);
 
but it doesn't show the value.
Can anyone assist ?
 
 
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