java - 需要包含 externalclass.innerclass 的封闭实例

Question

Student.Student_Card obj4 = Student.new Student_Card(namess, idss, true);

Student 类是外部类，Studen_Card 是嵌套类，当我运行此代码时，我收到错误: 需要包含 Student.Student_Card 的封闭实例

Answer 1

你需要这样做:

Student.Student_Card obj4 =new Student.Student_Card(namess, idss, true);