Remove all objects in an arraylist that exist in another arraylist

Question

I\'m trying to read in from two files and store them in two separate arraylists. The files consist of words which are either alone on a line or multiple words separated by c

Answer 1

First you need to override equal method in your custom class and define the matching criteria of removing list

public class CustomClass{

 @Override
    public boolean equals(Object obj) {

        try {
            CustomClass licenceDetail  = (CustomClass) obj;
            return name.equals(licenceDetail.getName());
        }
        catch (Exception e)
        {
            return false;
        }

    }
}

Second you call the removeAll() method

list1.removeAll(list2);