CODEWITHSUNDEEP
javatypeerror
BJustice
BJustice

Reputation: 115

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.

Upvotes: 9

Views: 65989

Answers (4)

Mohamed
Mohamed

Reputation: 11

You shouldn't use a dot after the import keyword, you should write it as

import java.util.ArrayList;

if it doesn't work even after this correction, then it's probably because of a bug in your editor. just close your code editor and reopen it, then the import statement will work fine.

Upvotes: 1

N.Neupane
N.Neupane

Reputation: 291

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);


    }

Upvotes: 2

SkyWalker
SkyWalker

Reputation: 29140

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

Resource Link: https://stackoverflow.com/a/11065545/2293534

Upvotes: 0

Kyle Gowen
Kyle Gowen

Reputation: 467

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!

Upvotes: 15

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