I want store return value from filter function in linked list

[hagersaleh]

I want store return value from filter function in linked list  the value
print in the enter but in external function when print linked list not have
any value 

final LinkedList<String> valuesfromsubquery1 =new  LinkedList();     
  customers.writeAsFormattedText("/home/hadoop/Desktop/Dataset/out1.text",
WriteMode.OVERWRITE,
                     
    new TextFormatter<Customer2>() {
      
        public String format (Customer2  value) {
           String s=value.f1.toString();
       
           valuesfromsubquery1.add(s);
            return value.getField(1).toString();
        }
    }).setParallelism(1);




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