I have a resultset which returns 5 values. I set that data in a POJO, and added that pojo to a list.
datapojo = new OutputViewDataPOJO();
datapojo.setTime(resultado.getInt(1));
datapojo.setCommandDesc(resultado.getString(2));
datapojo.setOkError(resultado.getString(3));
datapojo.setResultDesc(resultado.getString(4));
datapojo.setResultCode(resultado.getInt(5));
listPojo.add(datapojo);
[Description:Call connect, TimeStamp:0, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Waiting open complete, TimeStamp:2468, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Reading card, TimeStamp:0, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Waiting read card, TimeStamp:10329, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Reading card, TimeStamp:0, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Waiting read card, TimeStamp:6671, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Reading card, TimeStamp:0, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Waiting read card, TimeStamp:6704, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Reading card, TimeStamp:0, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Waiting read card, TimeStamp:6578, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Reading card, TimeStamp:0, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Waiting read card, TimeStamp:6578, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Reading card, TimeStamp:0, OkError:OK, ResultCode:0, ResultDesc:null.]
[Description:Waiting read card, TimeStamp:6594, OkError:OK, ResultCode:0, ResultDesc:null.]
the top listed data is printed in console, now my question: how can I get the sum of TimeStamp for the Description "Waiting read card". I need to do some statistics, in this case is getting the media value of timeStamp for every Description and I don´t know how to do that. Please, help me!
If you want to store that data in database and then retrieve , you need create a database and table (f.e. user) with these columns
name -age -city -car model -house type
Then you can store data ( Insert into user(name, age, city, car_model, house_type) values (?,?,?,?,?) and retrieve (Select * from user where city = 'Madrid') etc.
You could have a POJO entity as mentioned in one comments :
public class User
{
private int id;
private String name;
private int age;
private String city;
private String carModel;
private String houseType;
//getters , setters
}
Create corresponding table in database, and manipulate with data with Insert, Select queries.
If you don't want to store data in database, you can create a Maps for easy filtering. f.e.
User user = ...; //an instance of User
Map<String, List<User>> userCityMap = new HashMap<String,List<User>>();
List<User> userWithThatCity = map.get(user.getCity());
if(userWithThatCity == null)
{
userWithThatCity = new ArrayList<User>();
userCityMap.put(user.getCity(), userWithThatCity);
}
userWithThatCity.add(user);
...
I hope that will help.
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