Filter output columns in Table in SAP application

I think there can be a better option to do this. What you can try is fetch only the fields of the table which match the fields present in the table. Do not fetch all the fields of the table but the selected fields.

// Here Table refers to the JCo.Table
for (int j = 0; j < Table.getNumRows(); j++) {
   Table.setRow(j);
   Iterator iter = displayField.iterator();
   // fetch columns present in the current record
   while(iter.hasNext()){
      String column = (String) iter.next();
      String value = Table.getString(column);
      // perform your logic here
   }
}