java - 程序抛出堆栈溢出错误

Question

以下程序可以正确编译。是什么导致了堆栈溢出错误？异常是如何压入堆栈的？

public class Reluctant {

    private Reluctant internalInstance = new Reluctant();

    public Reluctant() throws Exception {
        throw new Exception("I’m not coming out");
    }

    public static void main(String[] args) {
        try {
            Reluctant b = new Reluctant();
            System.out.println("Surprise!");
        } catch (Exception ex) {
            System.out.println("I told you so");
        }
    }
}

Answer 1

您有一个字段初始化代码，它由 javac 编译器自动添加到构造函数主体中。实际上你的构造函数看起来像这样:

private Reluctant internalInstance;

public Reluctant() throws Exception {
    internalInstance = new Reluctant();
    throw new Exception("I’m not coming out");
}

因此它递归地调用自身。