Convert String into ArrayList.

 A very basic and simple approach to convert String into ArrayList.

if your String looks like - 

 String input[] = {"one","two","three"};

import java.util.ArrayList;
import java.util.List;

public class Javaoneworld {



    public static void main(String[] args) {

        String input[] = {"one","two","three"};
        List<String> arrList = new ArrayList<>();

        for(String s:input){

            arrList.add(s);
        }
        System.out.print(arrList);
    }

}

   

And if String looks like below - 

 String input = "[one,two,three]";

Then - 

import java.util.ArrayList;
import java.util.List;

public class First {



    public static void main(String[] args) {

        List<String> arrList = new ArrayList<>();
        String input = "[one,two,three]";

        String stringArr[] = input
                .replace("[","")
                .replace("]","")
                .split(",");

        for(String s:stringArr){

            arrList.add(s);
        }
        System.out.print(arrList);
    }

}

   

And if String is - 

String input = "[\"one\",\"two\",\"three\"]";

then - 

import java.util.ArrayList;
import java.util.List;

public class First {



    public static void main(String[] args) {

        String input = "[\"one\",\"two\",\"three\"]";
        Gson gson = new Gson();
        JsonArray jsonArray = gson.fromJson(input, JsonArray.class);
        List<String> arrList = new ArrayList<>();
        for (JsonElement jsonElement : jsonArray) {
            String s = jsonElement.getAsString();
            arrList.add(s);
        }

        System.out.println(arrList);
    }

}