-
-
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.eEven Class B declare as Private.How is it possible?Explain with an example.
byteTech
- Jan 9th, 2007
The whole point of making the constructor of Class B private is to prevent its instantiation by the general audience. This is the genesis of factory design pattern, Class B in this case will define a getInstance() method which will return objects of class A
Nithya
- Nov 29th, 2006
It is possible using a 'FRIEND'
-
ArrayIndexOutOfBoundsException – attempt to access an out of range array index. int x [ ] = new int [ 5 ]; int y = -2; // 1 x [ y ] = 2; // 2 x [ 2 ] = 2; // 3 x [ 5 ] = 5; // 4 System.out.println( x[0] ); // 5 a) Statement 1 and 2 are false b) Statement 2 and 3 are false c) Statement 2 and 4 are false d) Statement 2 and 5 are false
bihag
- Mar 17th, 2007
Cbecause u develope array x[0],x[1],x[2],x[3],x[4]y=-2x[y] ==> give exceptionx[5] ==> give exception
-
How can we connect to a database without using connection class?
Srikanth Rao
- Nov 13th, 2006
using DataSources We can Connect to DataBase
srinivasaraobora
- Oct 15th, 2006
Hi,I think it is possible by Hibernate (ORM tool).if any one want example code plz send a mail to id.keeps smiling and mailingbora_srinivasarao@yahoo.co.incell:+919989190898"HELP EVER HURT NEVER"&...
-
-
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 ...
-
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...
-
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...
-
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=""...
-
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...
-
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
-
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
-
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
5. Class.forName -
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
-
-
-
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...
-
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.
-
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 ).
-
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...
Java Interview Questions
Ans