Matching Input to ArrayList contents

It seems that the code is failing because it tries to compare the same FootballClub to match both team1 and team2 which cannot be true unless team1 is equal to team2.

If the task is to verify that the list of FootballClub instances contains a club with the given name, a separate simple method should be implemented:

static boolean clubListHasTeam(List<FootballClub> clubs, String team) {
    boolean found = false;

    for (FootballClub club : clubs) {
        if (club.getClubName().equals(team)) {
            found = true;
            break;
        }
    }
    return found;
}

Using Java Stream API helps to make this method more concise:

static boolean clubListHasTeam(List<FootballClub> clubs, String team) {
    return clubs.stream()
                .map(FootballClub::getClubName) // stream of the club names
                .anyMatch(team::equals);  // any club name matched the input name
}

Usage:

String team1 = userInput.nextLine();
String team2 = userInput.nextLine();
boolean valid = true;

if (!clubListHasTeam(addStats, team1)) {
    System.out.println(team1 + " is invalid");
    valid = false;
}
if (!clubListHasTeam(addStats, team2)) {
    System.out.println(team2 + " is invalid");
    valid = false;
}