Question

I have this piece of code and it’s causing NullPointerException

private List<Player> playerList;
private List<String> playerName;

Bundle b = getIntent().getExtras();
this.currentGame = b.getParcelable("created_tournament");
playerList = currentGame.getPlayers();
for (int i = 0; i < playerList.size(); i ++) {
    this.playerName.add(this.playerList.get(i).getName());
    Log.d(TAG, "Input was not a number!" + this.playerList.get(i).getName());
}           

with playerList is List<Player> taken from a Parcelable object and playerName is List<String>.

Theoretically, this.playerName.add(this.playerList.get(i).getName()); should works since Log.d(TAG, "Input was not a number!" + this.playerList.get(i).getName()); works fine without causing any exception

Any idea?

Answer 1

The playerName list in not initialized, and you call the method add on it while it’s null.

Change that:

private List<String> playerName;

to :

private List<String> playerName = new ArrayList<String>();