合并 类 时 Java 没有关闭实例错误

Question

我正在尝试将我单独的 Java 个文件放入 1 class。看起来像这样。

public class oneClass {
    class Request {
        public double a;
        public double b;
        public double c;

        public Request(double a, double b, double c) {
            this.a = a;
            this.b = b;
            this.c = c;
        }
    }

    public static class Controller {
        public static void main(String[] args) {   
            Request req = new Request(time, 0, 0);

            // some code
        }
    }
}

但是我运行出错了

"Exception in thread "main" java.lang.Error: Unresolved compilation problem: No enclosing instance of type oneClass is accessible. Must qualify the allocation with an enclosing instance of type problem2 (e.g. x.new A() where x is an instance of problem2).

怎么回事？

Answer 1

如果要在外部 class.

的实例之外构造它，则需要将 Request 设为静态 class