将项添加到列表时java.lang.StackOverflowError

Question

尝试将项目添加到列表并打印它们,它编译,但我得到一个运行时错误,其中堆栈溢出错误.这是错误打印出来的:

Exception in thread "main" java.lang.StackOverflowError
at List.<init>(List.java:5)
at List.<init>(List.java:9)
at List.<init>(List.java:9) <----- this line is repeated quite a few times 

这是我的代码,包含添加和打印列表的方法.

public class List {

private AthleteNode front;

public List(){
front = null;
}

public List athletes = new List();

//add athlete to the end of the list 
public void add(Athlete a){

AthleteNode node = new AthleteNode (a);
AthleteNode current; //temp node to iterate over the list

if(front == null)
    front = node;//adds the first element

else{
    current = front;
    while (current.next !=null)
    current = current.next;
    current.next=node;
    }

}

Answer 1

在您的类中List,您有一个List在其声明中初始化的实例字段

public List athletes = new List();

这意味着每次List都会有一个List具有List其中有一个List,令人作呕,造成StackOverflowError作为正在建设他们.

我不确定你对这个领域的意图,因为你没有在任何地方使用它.只需删除它.