Java appears No enclosing instance of type Test1 is accessible. (Turn, oneself also met!) ）

Recently in Java, when compiling an example of writing a book, because the code is only part of the book, so he complements an internal class. The result appears at compile time: No enclosing instance of type E is accessible.  Must qualify the allocation with an enclosing instance of type E (e.g. X.new A () where x is an instance of E). E refers to the inner class that I wrote.

As a hint, there is no instance of an accessible inner class E that must be assigned an instance of an appropriate inner class E (such as X.new A () and x must be an instance of E. look at this hint, I wonder, I have used new instantiation of this class, why not yet.

So Baidu Google a bit of relevant information. Originally I wrote the inner class is dynamic , that is, the beginning of the public class start. and the main program is public static class main. In Java, a static method in a class cannot invoke a dynamic method directly . Only an inner class is decorated as a static class, and then the member variables and member methods of the class can be called in a static class. So in the case of no other changes , the simplest solution is to change the public class to public static class.

Another solution: To write these classes separately, that is, to put them in different files, but also to solve the problem

Summarize:

A static method in a class cannot call a dynamic method directly.

1  2 3  Packageindex01;4 5  6 7  Public classTest1 {8 9  Ten  One   A  -  Public Static voidMain (string[] args) { -  the   -  -System.out.println ("1"); -  +person P1 =NewPerson ("Andy", "Beijing", "UIC"); -  + System.out.println (P1.info ()); A  at   -  -   -  -System.out.println ("2"); -  inTeacher T1 =NewTeacher ("Andy", "Zhuhai", "UIC", "student"); -  to System.out.println (T1.info ()); +  -     } the  *   $ Panax Notoginseng   Public Static classPerson { -  the PrivateString name; +  A PrivateString School; the  + PrivateString location; -  $   $  - Person (string name, string school) { -  the  This. name=name; - Wuyi  This. school=School; the  - } Wu  - Person (string name, string location, string school) { About  $  This. name=name; -  -  This. location=Location ; -  A  This. school=School; +  the } -  $  PublicString info () { the  the return"Name:" + name+ "\nlocation:" + location + "\nschool:" +School; the  the } -  in } the  the   Public Static classTeacherextendsperson{ About  the PrivateString position; the  the   +  -   the Bayi Teacher (string name, string school) { the  the Super(name, school); -  -   the  the } the  the Teacher (string name, string location, string school) { -  the Super(name, location, school); the  the  94  the } the  the Teacher (string name, string location, string school, string position) {98  About Super(name, location, school); - 101  This. position=position;102 103 } 104  the  PublicString info () {106 107 return Super. info () + "\nposition:" +position;108 109 } the 111   } the 113  } the  the  

testcal

Java appears No enclosing instance of type Test1 is accessible. (Turn, oneself also met!) )