Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
504 views
in Technique[技术] by (71.8m points)

NullPointerException in array.length Java

I've been getting an NPE whenever I try to access my array. Even calling for the .length attribute gives me an NPE. Any help would be appreciated. Here is my constructor and the method that keeps failing.

public SkierList() {
    Skier[] skiers= new Skier[INITIAL_CAP];
    for (int i = 0; i < skiers.length; i++){
        skiers[i] = new Skier("");
    }
    int count = 0;
    
}

public void add(Skier newSkier) {   
    if (this.size() < skiers.length)
    {
        skiers[count] = new Skier(newSkier.getName(), newSkier.getLevel());
        count++;
    }
}

The code compiles but throws the NPE at skiers.length

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Define skier globally:

public Skier[] skiers= new Skier[INITIAL_CAP];

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...