Constructor of package protected class

Why has class Test no constructor when trying to get the default constructor by reflection.
class Test {
     public static void main(String[] args){
          try {
               Class test=Test.class;
               Constructor[] ctor= test.getConstructors();
               System.out.println(ctor.length);
          } catch (Exception e) {
               e.printStackTrace();
}

Returns:
the array of Class objects representing all the
the declared members of this classWrong citation:
Returns an array containing Constructor objects reflecting all the public constructors of the class represented by this Class object. An array of length 0 is returned if the class has no public constructors, or if the class is an array class, or if the class reflects a primitive type or void.

Similar Messages

  • How to refer to a protected class outside the enclosing package

    Hi all,
    At the page 357 of the book Java Language Specification(Second Edition), when saying about checking accessibility of Type and Method, they concern Let C be the class containing the method invovation T.m, if T is in a different package than C, and T is protected then T is accessible if and only if C is a subclass of T. I just wonder how to refer a protected type outside the package it declared.
    For example,
    package test;
    public class test {
    static protected class protectedTest {
    public void foo() {..}
    in another package
    import test.*;
    class subtest extends test.protectedTest {  <- error
    Anyone can give me an example showing an invocation directly to foo() declared in class test.protectedTest ? The invocation should appear outside package test.
    Thanks,
    Ha Chau

    The protected inner class would be accesible only within a class which extends test, where you could either use or extend it as in:
    class subtest extends test {
        private static class sub2 extends protectedTest {
               }

  • How to create an instance of a protected class outside the enclosing packag

    Hi all,
    I have a piece of code like this:
    package test;
    public class A {
    protected class B { }
    How to create an instance of B outside the package test ? Could you please give me an example ?
    Thanks
    Ha Chau

    Thank WirajR for your reply, but in your solution,
    you have to create an instance of B inside class A
    and pass it outside. I would like to know whetherwe
    can create an instance of class B outside thepackage
    test. That means I want the instance creation
    expression of B appears outside the package test.Can
    we do that?
    If you want to use a class this way then it shouldn't
    be marked protected. I can't see why you don't
    just declare it public if that's what it is.
    Wouldn't be much point to haveing a protected
    modifier if it had no effect, would there?I think there is use for it if you use an interface to filter out the parts you want to give public access to, and keep the part you want to keep protected, protected

  • Accessing inner protected class with .new

    My weak understanding is that inner classes are no different in terms of access modification as other class members, thus I was expecting the following to compile:
    package A;
    public class ClassA {
        protected void protectedMethod() {}
        protected class ProtectedInnerClass {}
    }is being used over here in package B
    package B;
    import A.*;
    public class ClassB extends ClassA {
    public static void main(String[] args) {
    ClassB b = new ClassB();
    b.protectedMethod(); // works fine. I am inheriting ClassA and calling the protected method.
    ClassB.ProtectedInnerClass c = b.new ProtectedInnerClass(); // compiler error: ProtectedInnerClass is protected
    }Why can I not access the protected inner class when ClassB is inheriting it as is the case with the protected method?
    thanks in advance!

    So classes that inherit other classes with protected inner classes will not be able to instantiate these inner classes regardless of the inheritance relationship.No, that's not true. Example:
    package A;
    public class ClassA {
         protected void protectedMethod() {
         protected class ProtectedInnerClass { // class is protected
              public ProtectedInnerClass() { } // <-- nota bene
    package B;
    import A.ClassA;
    public class ClassB extends ClassA {
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              b.protectedMethod(); // works fine.
              ClassB.ProtectedInnerClass c = b.new ProtectedInnerClass(); // works fine, too.
    }It's section 6.6.2.2 that describes this behavior, as I quoted above. The last bullet point of that section reads (to repeat): "A protected constructor can be accessed by a class instance creation expression (that does not declare an anonymous class) only from within the package in which it is defined."
    ~

  • EJBs accessing protected classes from java classloader

    Hello,
    We are facing a problem with classes isolation. I read from this newsgroup that
    to access a package level class from the base classloader from a bean, the supporting
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    The purpose of this mail is to ask: is it a bug from weblogic server? Will it
    be fixed one day? If not, does it mean that it is impossible to isolate classes
    for local access from public classes?
    Thank you, Khiet.

    Thank you for your reply.
    Hope that one day we will not be obliged to have anything in the main classpath.
    :) Khiet.
    Rob Woollen <[email protected]> wrote:
    Tran T. Khiet wrote:
    Hello,
    We are facing a problem with classes isolation. I read from this newsgroupthat
    to access a package level class from the base classloader from a bean,the supporting
    classes has to be from the same classloader as the bean. Well I thinkthe only
    way we could do that is to have the *Bean.class in the base classloader,which
    is not what's recommended or move the support classes into the bean'sclassloader,
    which we cannot do.All correct.
    The purpose of this mail is to ask: is it a bug from weblogic server?No, it's how java classloaders work.
    Will it
    be fixed one day? If not, does it mean that it is impossible to isolateclasses
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    Thank you, Khiet.

  • Downloading packages and class files

    Hi Friends
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    Samia

    -------- Original Message --------
    Subject: [Fwd: downloading packages and class files]
    Date: Wed, 19 Jan 2005 13:14:24 -0700
    From: Jim Litton <[email protected]>
    Newsgroups: weblogic.developer.interest.portal
    Samia,
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    of, have methods to add remove users and groups, etc.
    http://e-docs.bea.com/wlp/docs81/javadoc/com/bea/p13n/security/management/authentication/AtnManagerProxy.html
    3. has a LdapPropertyManager EJB which is configurable through the
    p13n_ejb.jar deployment descriptors (ejb-jar.xml and
    weblogic-ejb-jar.xml) for retrieving user properties from an LDAP
    Directory Server.
    In 7.0+ and 8.1 Weblogic Server a new more flexible security provider
    framework was added to permit more flexible use of multiple security
    stores, perimeter authentication, and role mapping.
    Samia Rahumani wrote:
    Hi Friends
    I have a query regarding downloading packages . I have a LdapHelper class defined in a package of com.beasys.commerce.bridge.ldap of wls 2.0 version . I want that package to be imported to my wls of 8.1 version . Is this feasible ? . Can i download Package files as such . If so how ? .
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  • [svn] 2932: Updated manifests with recent changes to TCAL package and class names.

    Revision: 2932
    Author: [email protected]
    Date: 2008-08-20 14:01:37 -0700 (Wed, 20 Aug 2008)
    Log Message:
    Updated manifests with recent changes to TCAL package and class names.
    Reviewer: Jason
    Bugs: SDK-16531
    QA: No
    Doc: No
    Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-16531
    Modified Paths:
    flex/sdk/trunk/frameworks/fxg-manifest.xml
    flex/sdk/trunk/frameworks/mxml-2009-manifest.xml

    Revision: 2932
    Author: [email protected]
    Date: 2008-08-20 14:01:37 -0700 (Wed, 20 Aug 2008)
    Log Message:
    Updated manifests with recent changes to TCAL package and class names.
    Reviewer: Jason
    Bugs: SDK-16531
    QA: No
    Doc: No
    Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-16531
    Modified Paths:
    flex/sdk/trunk/frameworks/fxg-manifest.xml
    flex/sdk/trunk/frameworks/mxml-2009-manifest.xml

  • [svn:fx-trunk] 15741: * Package and class level Javadoc for the flex2. compiler.media package.

    Revision: 15741
    Revision: 15741
    Author:   [email protected]
    Date:     2010-04-26 22:43:03 -0700 (Mon, 26 Apr 2010)
    Log Message:
    Package and class level Javadoc for the flex2.compiler.media package.
    QE notes:
    Doc notes:
    Bugs:
    Reviewer: Corey (post-commit)
    Tests run: checkintests
    Is noteworthy for integration: NO
    Modified Paths:
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/AbstractTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/DataTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/FontTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/ImageTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/JPEGTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/LosslessImageTranscoder.jav a
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/MovieTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/SVGTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/SkinTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/SoundTranscoder.java
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/XMLTranscoder.java
    Added Paths:
        flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/media/package.html

  • [svn] 719: Added package and class level javadoc.

    Revision: 719
    Author: [email protected]
    Date: 2008-03-03 11:34:54 -0800 (Mon, 03 Mar 2008)
    Log Message:
    Added package and class level javadoc.
    Modified Paths:
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/Configuration.java
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/Element.java
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/ImplementationCompiler.java
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/InterfaceCompiler.java
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/LogAdapter.java
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/SourceCodeBuffer.java
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/Visitor.java
    Added Paths:
    flex/sdk/trunk/modules/compiler/src/java/flex2/compiler/mxml/package.html

    Just create a package.html file in the package folder and put your package documentation there. I just put my cursor on the Application Sources package folder name and right click and create a simple file. It will default to the package folder.

  • What is the package-visible class?

    I am reading JCVM2.2.1 Spec.
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    for example,
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    What is the package-visible class in Java Card?

    There is something called package protected in Java. This means that an object may be accessible thru a package only. Sort of like public with limited visibility.
    Search the Java 2 Tutorial.

  • How to protect protected classes?

    I�m Brazilian, and I am learning English language yet. I�ll try to describe my problem.
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    There is a solution. I created the same post in Programming section of this forum, that is more apropriate, and there a user called Shag-VT posted a solution.
    The way to ensure that nobody is getting into your classes is to "seal" the >package in the manifest and then sign the jar with a digital signature.
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  • Read Only Model via package protection and delegation

    I have a model that I have made read only to most client code by use of package protection and delegation.
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    One way is to provide a copy to the client, the client could update their copy but only your copy would be the master.
    This way the client would use the same classes you do.
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  • How do I find out what Package a class is in

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    --Prasanna                                                                                                                                                                                                                                                                                                                   

  • Package and class viewer

    Hello,
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    Thanks
    Farooq.

    Thanks for the repose. Ctrl+ , along with Ctrl= is doing the same thing. Also discovered Ctrl- will bring up java classes. Only thing remains is the remaining files in the project e.g XML or JSP files
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