Return内部类调用对象函数

public class OuterClass {
    private int num;

    public OuterClass(int num) {
        this.num = num;
    }

    public void outerMethod() {
        System.out.println("Outer method");
    }

    public class InnerClass {
        public void innerMethod() {
            System.out.println("Inner method");
            outerMethod(); // 调用外部类的函数
            System.out.println("Num: " + num); // 访问外部类的成员变量
        }
    }

    public static void main(String[] args) {
        OuterClass outer = new OuterClass(10);
        OuterClass.InnerClass inner = outer.new InnerClass();
        inner.innerMethod();
    }
}