Extract List<String> data to Match LinkedHashMap<Integer, List<String>>

Question

I have a List<String> data which is like:

{"0":["passFrom","3/9/2018","3/9/2018","anotherMethod","but"],"1":["googleForAlongTIme","3/9/2018","3/9/2018","stillCannotConvert","theLinkHashMap"]}

I need to store to a linkeHashMap with the above data, so far I had try something like below.

ArrayList<String> listdata = new ArrayList<String>();
Map<Integer, List<String>> listMap = new LinkedHashMap<Integer, List<String>>();
if (jsonArray.getString(0).trim()!= null && !jsonArray.getString(0).isEmpty()) {
 for (int i = 0; i < jsonArray.length(); i++){ 
 listdata.add(jsonArray.getString(i)); // here is the data which shown above
 //trying to use split at here but find out `**["passFrom","3/9/2018","3/9/2018","anotherMethod","but"],"1"**` is not the correct data
 /*List<String> bothList= Arrays.asList(listdata.get(i).toString().split(":"));
 for (String string : bothList) {
 List<String> tempData=Arrays.asList(bothList.toString());
 listMap.put(i, tempData);
 System.out.println("TeST: " + string);
 }*/
 }
}

Need some hints and help here, as my final aim is to get the 0,1 integer and below data to store inside the listMap

"passFrom","3/9/2018","3/9/2018","anotherMethod","but" "googleForAlongTIme","3/9/2018","3/9/2018","stillCannotConvert","theLinkHashMap"

• MadProgrammer: So, you have some Strings which look like JSON ... maybe use a JSON parser to parse them, then you can gain (easier) access to the properties. Maybe even parse them to a POJO, which would make the whole thing simpler to process
• 薛源少: yeap, I try to use json parser but the server side do not allowed to added the json identifier. I had no choice to come out something like this at the client side. lol, thanks.

Answer 1

Try this:

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.util.List;
import java.util.Map;
public class ParseJson {
 public static void main(String[] args) throws IOException {
 ObjectMapper objectMapper = new ObjectMapper();
 final String jsonStr = "{\"0\":[\"passFrom\",\"3/9/2018\",\"3/9/2018\",\"anotherMethod\",\"but\"],\"1\":[\"googleForAlongTIme\",\"3/9/2018\",\"3/9/2018\",\"stillCannotConvert\",\"theLinkHashMap\"]}";
 Map<Integer, List<String>> map = objectMapper.readValue(jsonStr, new TypeReference<LinkedHashMap<Integer, List<String>>>(){});
 for (Map.Entry<Integer, List<String>> entry : map.entrySet()) {
 System.out.printf("For item \"%d\", values are:\n", entry.getKey());
 for (String value : entry.getValue()) {
 System.out.printf("\t[%s]\n", value);
 }
 }
 }
}

Outputs:

For item "0", values are:
 [passFrom]
 [3/9/2018]
 [3/9/2018]
 [anotherMethod]
 [but]
For item "1", values are:
 [googleForAlongTIme]
 [3/9/2018]
 [3/9/2018]
 [stillCannotConvert]
 [theLinkHashMap]

• Bohemian: This, but in a loop for each element of the List.
• Eric Green: Fantastic! I'm glad you're pleased. Good luck!