ArrayList<> cannot be resolved to a type

I am struggling with a homework assignment in my java course. The problem I am having is with constructing instance data. My professor has given us a video to watch and I am following each step, but Eclipse is saying that my ArrayList cannot be resolved to a type.

import.java.util.ArrayList;
public class Campaign { private String candidateName; private ArrayList<DonorList> donors; public Campaign(String name) { //TODO Initialize all of the instance data candidateName = name; donors = new ArrayList<DonorList>(); }

Any and all help is appreciated.

3 Answers

You probably need to add an import statement.

import java.util.ArrayList;

This goes after your package declaration. This let's the system know what an ArrayList is and what methods it has available.

Hope that was it!

Hello you have made a lot of mistakes.

1) There is dot after import. 2) No main method

and many other.

Though I have corrected all of them . Hope this finally works.

import java.util.ArrayList;
public class Campaign { private String candidateName; private ArrayList<String> donors; public Campaign(String name, ArrayList<String> a1) { candidateName = name; donors = a1; } public static void main(String[] args) { ArrayList <String> aa = new ArrayList <String>(); aa.add("Ram"); aa.add("Sita"); Campaign obj = new Campaign("Nischal",aa); System.out.println(obj.candidateName + " "+ obj.donors); }

For auto importing in Eclipse IDE, you should press Shift+Ctrl+O

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