How to access function in extended class

I have a quick java question if you have the time to work it out - I've been doing some C# recently and wondered what the Java equivalent would be.
If I have a base class, that inherits another class, which also inherits another class, how do you access the monkey function in the cat class if I have a monkey function with the same name in the kennel class?
class cat {
void monkey() {
System.out.println("monkey in cat");
class kennel extends cat {
void monkey() {
System.out.println("monkey in kennel");
class test extends kennel {
test() {
monkey();
public static void main(String args[]) {
new test();

You can't. That's the way inheritance works.
If however you wish to call a method of the superclass in your class, use
super.methodName(arg1, arg2, ...);

Similar Messages

How to access function from Top Class to Function of class that contain the the member variable of TopClass

Dear All,
is there any way that i can access function or member variable of aggregate class.
i am working in Visual Studio 2010
and making win32 dll with mfc Support. i am new in dll system. just learning and doing.
previously all in exe and i am working this like
CTestDoc*pDoc = (CTestDoc*)GetTestDocument();
somevar = pDoc->xDoc.mVar.GetValue ();
now i am trying to put all in dll. so getting problem
will i get help on this. thanks in advance.
below code is just an example.
for example
// dll 1
class aaa : public BaseClass
public:
int Index;
char *cName;
void doSometing()
if (GetCurBColor() == 125) // how to access GetCurBColor function of the
color = GetCurBColor();
long color;
// dll 2
class bbb :public BaseClass
public:
int Index;
long lSize;
long color;
void doSometing();
// dll 3
class DDD
public:
vector <aaa> va;
vector <bbb> vb;
int cura;
int curb;
long GetCurBColor ()
return vb[curb].color;
};// MFC doc/view support
/// in exe in document
class inExe
public:
DDD d;
void addB()
{ bbb bb;
bb.color = 152;
d.vb.push_back(bb);
bb.color = 122;
d.vb.push_back(bb);
bb.color = 1232;
d.vb.push_back(bb);
d.curb = 1;
void addA()
{ aaa aa;
aa.color = 152;
d.va.push_back(aa);
aa.color = 1232;
d.va.push_back(aa);
aa.color = 1542;
d.va.push_back(aa);
aa.color = 15;
d.va.push_back(aa);
d.cura = 2;
d.va [1].doSometing ();

Dear All,
is there any way that i can access function or member variable of aggregate class.
i am working in Visual Studio 2010
and making win32 dll with mfc Support. i am new in dll system. just learning and doing.
previously all in exe and i am working this like
CTestDoc*pDoc = (CTestDoc*)GetTestDocument();
somevar = pDoc->xDoc.mVar.GetValue ();
now i am trying to put all in dll. so getting problem
What problem?
The rules of C++ do not change because some of the code ins in a DLL. But the classes in a DLL need to be exported. See for example
https://msdn.microsoft.com/en-us/library/81h27t8c.aspx
You should also supply a macro so that the class header can be used in both the DLL and the client. See for example
http://stackoverflow.com/questions/14980649/macro-for-dllexport-dllimport-switch
If you exchange memory between the DLL and the client (as your example will do, because of the std::vector content), you should also be sure to use the same version of the compiler for each module, and to dynamically link to the CRT.
I would also advise you to start with a less complicated scenario, with just one DLL.
David Wilkinson | Visual C++ MVP

How to load function from derived class from dll

Dear all,
how to access extra function from derived class.
for Example
//==========================MyIShape.h
class CMyIShape
public:
CMyIShape(){};
virtual ~CMyIShape(){};
virtual void Fn_DrawMe(){};
// =========== this is ShapRectangle.dll
//==========================ShapRectangle .h
#include "MyIShape.h"
class DLL_API ShapRectangle :public CMyIShape
public:
ShapRectangle(){};
virtual ~ShapRectangle(){};
virtual void Fn_DrawMe(){/*something here */};
virtual void Fn_ChangeMe(){/*something here */};
__declspec (dllexport) CMyIShape* CreateShape()
// call the constructor of the actual implementation
CMyIShape * m_Obj = new ShapRectangle();
// return the created function
return m_Obj;
// =========== this is ShapCircle .dll
//==========================ShapCircle .h
#include "MyIShape.h"
class DLL_API ShapCircle :public CMyIShape
public:
ShapCircle(){};
virtual ~ShapCircle(){};
virtual void Fn_DrawMe(){/*something here */};
virtual void Fn_GetRadious(){/*something here */};
__declspec (dllexport) CMyIShape* CreateShape()
// call the constructor of the actual implementation
CMyIShape * m_Obj = new ShapCircle();
// return the created function
return m_Obj;
in exe there is no include header of of ShapCircle and ShapRectangle
and from the exe i use LoadLibrary and GetProcAddress .
typedef CMyIShape* (*CREATE_OBJECT) ();
CMyIShape*xCls ;
//===================== from ShapeCircle.Dll
pReg= (CREATE_OBJECT)GetProcAddress (hInst ,"CreateShape");
xCls = pReg();
now xCls give all access of base class. but how to get pointer of funciton Fn_GetRadious() or how to get access.
thanks in advance.

could you please tell me in detail. why so. or any reference for it. i love to read.
i don't know this is bad way.. but how? i would like to know.
I indicated in the second sentence. Classes can be implemented differently by different compilers. For example, the alignment of member variables may differ. Also there is the pitfall that a class may be allocated within the DLL but deallocated in the client
code. But the allocation/deallocation algorithms may differ across different compilers, and certainly between DEBUG and RELEASE mode. This means that you must ensure that if the DLL is compiled in Visual Studio 2010 / Debug mode, that the client code is also
compiled in Visual Studio 2010 / Debug mode. Otherwise your program will be subject to mysterious crashes.
is there any other way to archive same goal?
Of course. DLL functionality should be exposed as a set of functions that accept and return POD data types. "POD" means "plain-ole-data" such as long, wchar_t*, bool, etc. Don't pass pointers to classes.
Obviously classes can be implemented within the DLL but they should be kept completely contained within the DLL. You might, for example, expose a function to allocate a class internally to the DLL and another function that can be called by the client code
to free the class. And of course you can define other functions that can be used by the client code to indirectly call the class's methods.
and why i need to give header file of ShapCircle and shapRectangle class, even i am not using in exe too. i though it is enough to give only MyIShape.h so with this any one can make new object.
Indeed you don't have to, if you only want to call the public properties and methods that are defined within MyIShape.h.

How to access var in outter class inside inner class

I've problem with this, how to access var number1 and number2 at outter class inside inner class? what statement do i have to use to access it ? i tried with " int number1 = Kalkulator1.this.number1; " but there no value at class option var y when the program was running...
import java.io.*;
public class Kalkulator1{
int number1,number2,x;
/* The short way to create instance object for input console*/
private static BufferedReader stdin =
new BufferedReader( new InputStreamReader( System.in ) );
public static void main(String[] args)throws IOException {
System.out.println("---------------------------------------");
System.out.println("Kalkulator Sayur by Cumi ");
System.out.println("---------------------------------------");
System.out.println("Tentukan jenis operasi bilangan [0-4] ");
System.out.println(" 1. Penjumlahan ");
System.out.println(" 2. Pengurangan ");
System.out.println(" 3. Perkalian ");
System.out.println(" 4. Pembagian ");
System.out.println("---------------------------------------");
System.out.print(" Masukan jenis operasi : ");
String ops = stdin.readLine();
     int numberops = Integer.parseInt( ops );
System.out.print("Masukan Bilangan ke-1 : ");
String input1 = stdin.readLine();
int number1 = Integer.parseInt( input1 );
System.out.print("Masukan Bilangan ke-2 : ");
String input2 = stdin.readLine();
int number2 = Integer.parseInt( input2 );
     Kalkulator1 op = new Kalkulator1();
Kalkulator1.option b = op.new option();
     b.pilihan(numberops);
System.out.println("Bilangan yang dimasukkan adalah = " + number1 +" dan "+ number2 );
class option{
int x,y;
     int number1 = Kalkulator1.this.number1;
     int number2 = Kalkulator1.this.number2;
void pilihan(int x) {
if (x == 1)
{System.out.println("Operasi yang digunakan adalah Penjumlahan");
        int y = (number1+number2);
        System.out.println("Hasil dari operasi adalah = " + y);}
else
{if (x == 2) {System.out.println("Operasi yang digunakan adalah Pengurangan");
         int y = (number1-number2);
         System.out.println("Hasil dari operasi adalah = " + y);}
else
{if (x == 3) {System.out.println("Operasi yang digunakan adalah Perkalian");
         int y = (number1*number2);
         System.out.println("Hasil dari operasi adalah = " + y);}
else
{if (x == 4) {System.out.println("Operasi yang digunakan adalah Pembagian ");
         int y = (number1/number2);
         System.out.println("Hasil dari operasi adalah =" + y);}
else {System.out.println( "Operasi yang digunakan adalah Pembagian ");
}

Delete the variables number1 and number2 from your inner class. Your inner class can access the variables in the outer class directly. Unless you need the inner and outer class variables to hold different values then you can give them different names.
In future place code tags around your code to make it retain formatting. Highlight code and click code button.

How to access variables from other class

    public boolean inIn(Person p)
        if (name == p.name && natInsceNo == p.natInsceNo && dateOfBirth == p.dateOfBirth)
             return true;
        else
             return false;
    }//returns true if Person with same name/natInsceNo/dateOfBirth as phello,
here am trying to compare the existing object with another object.
could you please tell me how to access the variables of other class because i meet this error?
name cannot be resolved!
thank you!

public class Person
    protected String name;
    protected char gender;      //protected attributes are visible in the subclass
    protected int dateOfBirth;
    protected String address;
    protected String natInsceNo;
    protected String phoneNo;
    protected static int counter;//class variable
//Constractor Starts, (returns a new object, may set an object's initial state)
public Person(String nme,String addr, char sex, int howOld, String ins,String phone)
    dateOfBirth = howOld;
    gender = sex;
    name = nme;
    address = addr;
    natInsceNo = ins;
    phoneNo = phone;
    counter++;
public class Store
    //Declaration of variables
    private Person[] list;
    private int count;
    private int maxSize;
//constructor starts
    public Store(int max)
         list = new Person[max];//size array with parameters
         maxSize = max;
         count = 0;
    }//end of store
//constructor ends
//accessor starts
    public boolean inIn(Person p)
       return (name == p.name && address == p.address && natInsceNo == p.natInsceNo);
    }//returns true if Person with same name/natInsceNo/dateOfBirth as phope it helps now!

How to access SOAPAction in Handler class ?

How do I access the SOAPAction in a handler class? I've tried to get the SOAPACTION_URI_PROPERTY
from the SOAPMessageContext, but the value is null.

Thanks Christian -- that worked great.
"Christian" <[email protected]> wrote:
>
Hi Nancy,
the SOAP Action is a HTTP Header field:
http://www.w3.org/TR/SOAP/#_Toc478383528
So it should be possible to get this information through the
getHeader() or getHeaders() method from the HTTPServletRequest
http://java.sun.com/products/servlet/2.3/javadoc/javax/servlet/http/HttpServletRequest.html#getHeader(java.lang.String)
Christian Plenagl
Developer Relations Engineer
BEA Support
"Nancy" <[email protected]> wrote:
How do I access the SOAPAction in a handler class? I've tried to get
the SOAPACTION_URI_PROPERTY
from the SOAPMessageContext, but the value is null.

Accessing function with a Class

Hi
I have a mp3player that I want to include in another flash
movie. The mp3player is a movie clip with an actionscript class
attached to it. I can use the mp3 player fine and it works
perfectly, but I have a slight problem when I want to change one of
the variables in the class. The class contains get and set methods
to change the playlist etc, and the only way I can think of to
access them is to create a new player object and call the functions
on that object. This kind of works- I can call the function and it
resets the playlist value, but for some reason the constructor in
the class is called straight afterwards and the playlist reverts
back to the default. I have a feeling this has something to do with
the fact that the actionscript class is attached to the player
movieclip, but I'm not an expert at using OO design in flash, and
so can't be certain.
I hope someone can help- I'm sorry I can't post any of the
code in the class, but it's a file I bought and the copyright won't
allow me to do so.
Thanks in advance
S

It's hard to attemp an answer when you don't supply any code.
Do you have access to the .fla file? What variables are are
involved? What are the instance names.? Are you working with the
.swf file?
If you are wrking with a .swf perhaps there is a LoadVariable
which is loading the play list from a text file which is probably
located in some folder under the SWFs root folder.on your system.
Check there and if so, let me know and I'll try to assist.

How to access graphic components from classes?

Hi,
I am creating a Flex application. In my Main.mxml, I add
different UI elements, such as panels. I also have a few
actionscript files. Everything is in the same folder. So my
question is : how can I access a panel created in Main.mxml from an
actionscript class ? By accessing the panel, I mean things like
change its properties, etc. Is it possible to access those in a
'Flash-like' way, using something like _root.myPanel, or is it only
possible through passing parameters?

Well...it pains me to see someone obviously new to programming struggle here...so I'll take this one on:
Here is the BAD way to do it...but it is basically what you are looking for...to learn GOOD ways to do this, please invest in some programming books and learn about encapsulation, MVC, and other programming/architectural styles...anyways...here is the BAD, but easy way:
In your SGui class, right after the constructor you have to "declare" your object reference as a class member, so edit your file to make it say:
public class SGui {
public JButton addStickButton;Then, edit the line in SGui that says:
final JButton addStickButton = new JButton();so that it just says:
addStickButton = new JButton();Then, in your Soft class, you can access it just the way you wanted to in your comment:
gui.addStickButton.setEnabled(false);Other Java programmers reading this thread will probably shoot me for showing you how to do it this way, because it violates principles of encapsulation...but go ahead and use it so you can move forward...but study a little more online or in books to get the hang of it :)
Message was edited by:
beauanderson
Message was edited by:
beauanderson

How to access super of enclosing class from inner class?

Hello,
I'd like to access Base.foo() from inner class in overridden Improved.foo(), but seem unable:
public class InnerSuper {
     public static class Base {
          protected int foo() {
               return 1;
     public static class Improved extends Base {
          @Override
          protected int foo() {
               return Integer.parseInt(new Object () {
                    public String toString() {
                         return "1"+foo() ;
               }.toString());
     public static void main(String[] args) {
          System.out.println(new Improved().foo());
}The code above does not work, as it recursively calls Improved.foo() where I'd like it to call Base.foo(). What syntax construct should I use? Improved.this would be the same thing, Improved.super does not exist.
I came up with a work around: adding a method baseFoo() to Improved and call that in the inner class:
   int baseFoo() {
      return super.foo();
   } but remain wondering if that is necessary?

Indeed, Improved.super.foo() is allowed. My Eclipse syntax highlighting seems to have the same opinion as you: "are you sure you want to write that kind of code?" and leaves the read underlining for a syntax error on for just a second longer.
This is where I am now:
     public static class DeferredExecSubroutineCall extends SubroutineCall {
          RelayExecutor relay;
          public DeferredExecSubroutineCall(RelayExecutor relay) {
               this.relay = relay;
          @Override
          protected String execute(final IFDSOC fd, final String commandText) {
               Future<String> f = relay.submit(new Callable<String>() {
                    @Override
                    public String call() throws Exception {
                         return DeferredExecSubroutineCall.super.execute(fd, commandText);
               try {
                    return f.get();
               } catch (InterruptedException e) {
                    throw new RuntimeException(e);
               } catch (ExecutionException e) {
                    if (e.getCause() instanceof RuntimeException) {
                         throw (RuntimeException) e.getCause();
                    } else {
                         throw new RuntimeException(e.getCause());
     }which is my current effort of adding concurrency to an existing project. I find it quite elegant but I am interested to hear from you...

How to access variables from other classe through getter ?

Hi !
I have 10 classes
Cau_1.java containing char Cau_1_Answer;
Cau_2.java... Cau_2_Answer;
Cau_10.java... Cau_10_Answer;
and another class Resume_grammar.java with char[] AnswerList = new Char[10] used to hold cau_1_Answer, Cau_2_Answer...Cau_10_Answer.
but I don't success to get them.
In Cau_1.java, I do :
private static char Cau_1_Answer;
static char getCau_1_Answer() {
          return Cau_1_Answer;
     static void setCau_1_Answer(char cau_1_Answer) {
          Cau_1_Answer = cau_1_Answer;
if (a.isChecked()) {Cau_1_grammar.setCau_1_Answer('a');}
if (b.isChecked()) {Cau_1_grammar.setCau_1_Answer('b');}
if (c.isChecked()) {Cau_1_grammar.setCau_1_Answer('c');}
if (d.isChecked()) {Cau_1_grammar.setCau_1_Answer('d');}
Cau_2, Cau_3...are the same way.
in Resume_grammar.java :
     static char[] AnswerList = new char[10];
AnswerList[0] = Cau_1_grammar.getCau_1_Answer();
AnswerList[9] = Cau_10_grammar.getCau_10_Answer();
When I make AnswerList display, all is null (nothing displayed).
Please help ! What I do wrong ?
Thank you !

Johnny.vn wrote:
Cau_1 is Question_1 (Vietnamese).
I am developing a academic test application with many question and finally display the result of the test.
Thank you.Back to the original question: why do you need to define different classes for different questions? Do they really behave differently in a way that can't be captured by a single class?

How to call functions defined and packed in a .dll file

hi,
my client have provided me with a .dll file which implements all functions tasks.
earlier we created a applications in vb that accessed functions from the .dll file provided by client.
now he wants java implementation of the same application written in vb.
now how to access functions in .dll file provided by the client from java source code.
regards,
s.mohamed asif

For this you should write JNI wrappers for the native functions, that is you create class with the native function prototypes as native methods, implement these methods with native functions in JNI module, each JNI function calls a native function from your DLL.
I know that JNI coding is a greate pain. That is why I am developing Java Platform Invoke which is a paradigm of .NET Platform Invoke. See my demo at
http://www.sharewareplaza.com/Java-Platform-Invoke-API-Demo-version-download_49212.html

How can access a data member in constructor

hello,
I want to know that How can access data member of class in constructor of same class
Thnx
Rakesh

You need to point it at
some object, like you do in newFile. What's in
newFile is fine, but newFile isn't called beforethe
doc= line.actually i have this a bigger program what i have
send before. i m getting a object of JEditorPane in
newFile() and asssigning it to epMain.
Thats why i want to access epMain's that value what i
have setted in newFile so i dont created a new object
and assigned in epMain as like
this.epMain= new JEditorPane();so how I can access epMain's that value what i have
setted in newFile()
here is actual newFile method
public void newFile()
Component comp=newEditPane();
JInternalFrame iFrame=makeIF(comp,"Untitled");
iFrame.setVisible(true);
if(iFrame.getDesktopPane().getSelectedFrame()!=null)
selectedFr=iFrame.getDesktopPane().getSelectedFrame();
Container iContent = selectedFr.getContentPane();
JScrollPane
jsp=(JScrollPane)iContent.getComponent(0);
JEditorPane
e=(JEditorPane)jsp.getViewport().getView();
this.epMain=e;
Hmmn... Rakesh you're so makulit. Do you know what null pointer means? Here read the docs API,
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/NullPointerException.html
You're displaying html using JEditorPane, why dont you try org.jdesktop.jdic.browser.WebBrowser?
http://java.sun.com/developer/JDCTechTips/2005/tt0505.html
Okie? ^_^
-Ronillo.

How to access an element using its name or id if it is not a class variable?

I am trying to retrieve the element I added to my UI in a different function. I am using actionscript 3. I know I can put the variable into a class variable, so it can be access anywhere in the class, but I have too many elements. Is there anyway I could access them without putting them into class variable?
Thanks.
public class Test extends SkinnableContainer{
// private var image:Image; <-- I try not to do this, too messy
private function func1() {
    var image:Image = new Image();
    addElement(image);
private function func2() {
    var image:Image = /* how to get the element from my UI without putting into class variable */

Here is what works for me:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"
               creationComplete="init()"
               minWidth="955" minHeight="600">
    <fx:Declarations>
        
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import spark.components.Image;
            private var image:Image;
            private function init():void
                image = new Image();
                addElement(image);
                trace(this["image"]);
        ]]>
    </fx:Script>
</s:Application>

HELP : How to access a datasource rowset in the AM class ?

Hi,
i have an AM "TestAM" which contains the viewobject "ViewTest".
in the class "TestAMImpl.java" i added a method called "verify()".
in my JSP i have initialised the AM and a datasource based on the VO "ViewTest" :
<jbo:ApplicationModule id="am" configname="TestAM.TestAMLocal" releasemode="Stateful" />
<jbo:DataSource id="ds" appid="am" viewobject="ViewTest" />
<%
TestAM am = (TestAM) am.useApplicationModule();
String Message = am.verify();
%>
My question is how to access to the rowset of the datasource "ds" in the code of the method
"verify()" ?
public class TestAMImpl extends ApplicationModuleImpl implements TestAM {
public String verify()
How to access the rowset initialised in the JSP???????????
Thanks for your help

This is correct. Think of the AM as having a hashtable of instances of view objects that you can lookup by instance name.
The <jbo:DataSource> tag lets you lookup an instance by name in the AM and get a reference to it to use in the JSP page. Within your AMImpl class, you can either:
[list]
[*]Call findViewObject("YourViewInstanceName"), or
[*]Just call the generated getYourViewInstanceName() method which is ok to call inside the Impl class to get hold of the same VO.
[list]

How to access variables declared in java class file from jsp

i have a java package which reads values from property file. i have imported the package.classname in jsp file and also i have created an object for the class file like
classname object=new classname();
now iam able to access only the methods defined in the class but not the variables. i have defined connection properties in class file.
in jsp i need to use
statement=con.createstatement(); but it shows variable not declared.
con is declared in java class file.
how to access the variables?
thanks

here is the code
* testbean.java
* Created on October 31, 2006, 12:14 PM
package property;
import java.beans.*;
import java.io.Serializable;
public class testbean extends Object implements Serializable {
public String sampleProperty="test2";
public String getSampleProperty() {
return sampleProperty;
}jsp file
<%@ page contentType="text/html;charset=windows-1252"%>
<%@ page import="java.sql.*,java.util.*"%>
<html>
<head>
<title>Schedule Details</title>
</head>
<jsp:useBean id="ConProp" class="property.testbean"/>
<body>
Messge is : <jsp:getProperty name="msg" property="sampleProperty"/>
<%
out.println(ConProp.sampleProperty);
%>
</body>
</html>out.println(ConProp.sampleProperty) prints null value.
is this the right procedure to access bean variables
thanks

How to access function in extended class

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