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Take 2 classes.i.e., Class A,Class B. In Class B declare constructor as Private.But I have to access Class A using the constructor in Class B. How is it possible?One interviewer told that Through getInstance() method it's possible to access Class A.e Even Class B declare as Private. How is it possible? Explain with an example.
Suneet Jain
- Nov 20th, 2006
class A { public static void main(String[] as) { B b = B.getInstance(); // get the instance of Class B and store it in variable b ...
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Hi i am new to this community. I am new to struts. I have one question that in struts-config.xml file in the action path we have several parameters. I want to know the significance of each parameter especially of input parameter. is it necessary to mention this paramter, if not specified then what will happen?Thanks in advance.
Radhakrishna
- Nov 9th, 2006
hi, The significance of input attribute for the action tag is:If any FormBean is mapped with that path then the request goes to that FormBean first instead of that action and it will...
hibapi
- Oct 31st, 2006
first you go through a text book on struts or go through some online tutorials on struts...for the first timers on struts.......i suggest the book by Steven Holzner.....sory i have forgotten the bo...
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Can u write example for static polymorphism?
sirisha
- Dec 19th, 2006
Hi all, what my frnd Abhishek has said is absolutely true.here goes the example &...
sharadmrg@GeekInterview.com
- Nov 7th, 2006
Hi, As I know method overloading would be an example of static polymorphism and method overriding would be an example of dynamic polymorphism. Because in static polymo...
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Code for creating a simple Calculator in Java Script.
Ram prabesh sah
- Jun 23rd, 2009
import java.util.*;import java.awt.event.*;import javax.swing.*;public class calculator1 implements ActionListener Runnable{JLabel l1 l2;String s1 "" s2 "" s3 "" s4 "...
BHASKAR CHAUHAN
- May 30th, 2007
import java.awt.*;import java.util.*;import java.awt.event.*;import javax.swing.*;public class calculator1 implements ActionListener,Runnable { JLabel l1,l2; String s1=""...
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How java supports inheritance and is java supports multiple inheritance, if so what about c++
ramesh chandra
- Jan 2nd, 2007
hi every bodyjava doesn't supports multiple inheritance .It supports via the interface implementationwhat actually means multiple inheritance:suppose class & sub classes use same type of function ...
sharadmrg@GeekInterview.com
- Nov 7th, 2006
Hi, Java doesn't support mulitple inheritance, it support single implementation inheritance. Object class is the super class of all the classes in java so whe...
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Where user defined exception stores?
Suresh R
- Mar 1st, 2007
Whenever a customized exception is to be thrown to the user, then the customized or user defined exception classes are created. These classes basically extends the Exception class.When the excep...
hi_goura
- Dec 4th, 2006
User defined exception is nothing but a sub-class of Exeption class. And when you are trying to throw or catch thatexception, an object of that will be created. And the basic concept says all the objects are stored in Heap memory.And your exception also...ThanksGourahari
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What is the difference between throw and throws?
vmshenoy
- Jan 10th, 2007
throw enables ur program to throw an exception explicitily.general form is throw abcabc is an object of type Throwable or subclass of Throwable.throws : if a method...
kiran
- Nov 28th, 2006
Throw - It is used to throw an Exception.The throw statement requires a single argument : a throwable class object throws - This is used to specifies that the method can throw exception
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Please tell me how many ways we can create objects in java & what are they.
tsreedarrao@gmail.com
- Jan 25th, 2007
There is 5 ways is there to create object
1. using new operartor
2. clone()
3. instaceOf
4. factory method
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Can destructor (as in C++) be implemented in Java?
sravan_reddy001
- Jan 24th, 2007
There is destructor concept in javabut there is method called finalize java has an inbuilt feature that collects the garbage memory locations and frees it regularlythe code in the finalize method will be executed when the java garbage colection utility frees that memory
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Q.1 :write a program to reverse a string without using reverse method.please give an example of such a program.Q.2 :how can we concatenate two strings without using concatenate operatorplease give an example.
renji_reshma
- Oct 1st, 2007
#include<iostream.h>int main(){char name[80],name1[80];int i,j;cout<<"nEnter string to be reversed:";cin.getline(name,80);i=j=0;while(name[i]!='')i++;while(--i>=0)name...
renji_reshma
- Oct 1st, 2007
#includ<iostream.h>int main(){char name[80],name1[80];int i,j;cout<<"nEnter string to be reversed:";cin.getline(name,80);i=j=0;while(name[i]!='')i++;while(--i>=0)name1...
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Why finalize method in object class is protected ?
vimalraj
- Mar 24th, 2008
The fact that class Object declares a finalize method means that the finalize method for any class can always invoke the finalize method for its superclass. This should always be done, unless it is th...
ravi_1229
- Mar 24th, 2008
Every user defined class extends object class in java . so if the user defined class having some resources to deallocate(such as database connection, file closing, streams closing) the finalize method is overriden in the current class. thats y the finalize method in object class is protected.
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What is binding in Java ?
Rohit Verma
- Jun 24th, 2012
Binding in java is between an object and its methods/variables. It can happen either at compile time( method overloading / normal call ) or at run time ( method override ).
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String b=a+"how r u";
String c=b+"buddy";
How many objects are there in the above code?">String a="hello";String b=a+"how r u";String c=b+"buddy";How many objects are there in the above code?
sadikmca2004
- Jul 17th, 2007
three Different object'su can go through the following progpublic class Demo { public static void main(String ar...
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What is the result of the following?public static void main(String[] args)
choice:a)compilation errorb)runtime errror Or what is the result?
vegetto
- Jun 16th, 2008
It will result in a compilation error because first thing is that you have not written method body ,else if you don't want to write method body then declare it abstract and terminate it using semi colon.
agsuvidha
- Aug 14th, 2007
This is perfectly fine as this is just an alternate way to create arrays int a[] or int[] a is exactly same
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What is mean by Referential intigrity?Which language understands web browsers?
dgshivas
- Feb 25th, 2008
Referential Intigrity is nothing but Primary Key concept in OracleBrowsers only understand HTML ,but we dont run servletes and jsp's at broweser side we run them at server side we get the values and we embed them with HTML
deepak
- Nov 24th, 2007
Browsers understands only HTML language and therefore we are able to run servlets and JSP in the browser as Servlet is HTML embedded in Java and JSP is Java enbedded in HTML.
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What exactly happens when Class.forName(sun.jdbc.odbc.JdbcOdbcDriver) gets called
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What is the data type we are using for storing different types of data in a single array?
rkbalag
- Dec 5th, 2007
We can use Hashtable to store different types of data in a single arrayHashtable hash = new Hashtable();hash.put("INT_OBJ",new Integer("1"));hash.put("STR_OBJ",new String("A")); hash.put("BOL_OBJ",new BOOLEAN(true));
agnihotri111984
- Nov 20th, 2007
According to my knowledge it is impossible but if it is possible then also share this information with me at agnihotri111985@timesindia.com.
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