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Subject: Re: when return value from linkedlist or map and use in filter
 function display error
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error dispaly
 non-static variable map cannot be referenced from a static context
map.put("C_MKTSEGMENT", 2);

code
public Map<String, Integer> map = new HashMap<String, Integer>();
  
   
    public static  void main(String[] args) throws Exception {    
  
        map.put("C_MKTSEGMENT", 2);
        ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
          DataSet<Customer3>
customers=env.readCsvFile("/home/hadoop/Desktop/Dataset/customer.csv")
					.fieldDelimiter('|')
					.includeFields("11000010").ignoreFirstLine()
					.tupleType(Customer3.class);
           customers = customers.filter(new FilterFunction<Customer3>() 
                        {
                            @Override                    
                            public boolean filter(Customer3 c) {
                   
                            Integer index1=map.get("C_MKTSEGMENT");
                            return c.getField(index1).equals("AUTOMOBILE");
                        }
                });
            
         customers.print();
         customers.writeAsCsv("/home/hadoop/Desktop/Dataset/out1.csv", "\n",
"|",WriteMode.OVERWRITE);               
        env.execute("TPCH Query 3 Example");	
        
    }


when remove static from main method display error not found main method




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