-
AND
String str=new String("abc");
">Is there any difference between String str="abc";ANDString str=new String("abc");
sensashan
- Oct 12th, 2009
Yes there is a difference. In case of str = "abc" we are creating an anonymous object and assigning it the reference str. But in case of str = new String("abc"), we are actua...
vinaygadiraju
- Oct 23rd, 2008
class A {..String s1="abc";String s2=new String "abc";..}The first line creates (sort of, see below) the String "abc" in the String pool, and s1 points to it. The second ...
-
Dynamic Object Creation
Why do we dynamic creation of object in Java?
-
Implement ArrayList
How do you implement ArrayList without using Collections in Java?
kneebrains
- Oct 30th, 2009
def size=10def loadfactor=0.75def myarray = Object[size]def cursor=0def threshold = (int)(size * loadfactor)def add(obj) if cursor < threshold ...
-
Java Program to Count Number of Files
50,000 HTML files are in a folder on a windows machine. Among them, content of some files(not the file names) contain the sentence "SocioMaC-Jus' Follow!". Write a Java program to count the number of such files.
kneebrains
- Oct 30th, 2009
If you need to _search_ random strings - use lucene. Otherwise i think sarje has the answer. Can you not write the text parsing in the file filter ?
Sarje
- Aug 20th, 2009
You can count the number of .html .htm files having any pattern suppose "Ram" using following code.import java.io.*;import java.util.Scanner;public class HtmlFileFilter implements FileFilter...
-
If we have two abstract classes A,B then can we extend both the classes in a single class?
-
Can a double value be cast to a byte
Yes, a double value can be cast to a byte.
swags12
- Nov 2nd, 2009
Yes a double value can be cast to bytefor eg: b=bytedouble d=conversion b=(byte) d:output will be 329.142
Muthu
- Aug 2nd, 2007
Hi could you please explain how can a double valuebe able to convert in to byte since the memory value of double(16 byte) is greater than a byte.
-
Sort an Integer Array
How to sort an integer array and remove duplicates without using java API
-
What is the diffrence between java.util.Date.*; and java.sql.Date.*;?
vaibhavsingla3
- Dec 15th, 2009
Java.util.date is a predefinesd library but java.sql.date is used strore date
-
Method Binding
What is method binding?
-
Difference between Throw & Throws
1)What is the difference between Throw & Throws?2)Explain the use of transient variable with example?
shanky_06
- Dec 22nd, 2009
Ans.1)With the use of 'throw' it mean that we are simply throwing the exception object(this is explicitly).but using 'throws' with method signature it mean that exception object is thrown implicitly by the method.
arunagar
- Dec 8th, 2009
For Question 1 - Throw we put in Catch block, when we want to throw the exception occured.Throws is written in the signature of the method, when we are anticipating some execption and we want that to ...
-
Thread.Suspend and Thread.resume
Why Thread.Suspend and Thread.resume methods are deprecated?
-
JSP jspinit() method
Will you be able to override jspinit() methods? Justify
apgenius
- Jan 10th, 2010
Yes, we can. Infact its actually why it's there. We override the jspinit() when we want to make some initial database connections etc..Same goes for jspdestroy(), but _jspService() can't be overriden.
-
Checked and Unchecked Exception
When should we use a checked exception and when should we use an unchecked exception?
-
Conversion of WSDL to Java and Java to WSDL
How to convert WSDL to Java code and Java code to WSDL?
-
Abstract Interface
What is mean by Abstract Interface?
-
Which of the function returns a reference to an object provided by an ActiveX component. a) createobject b) getobjectname c) createobjectx d) getobject
subhash gherade
- Jan 23rd, 2010
D ) getobjectReturns a reference to an object provided by an ActiveX component.SyntaxGetObject([pathname ] [ , class ] )
-
Struts Advantage
What is the advantage of using struts?
yogesh249
- Jan 27th, 2010
The main advantage of using Struts is that MVC architecture is followed.All the layers, presenation, business and Data access layers are seperated and Web-designer can work independently of the programmer and programmer need not have the knowledge of the designing part.
-
Can HashMap store null values?If yes, how many?
Can HashMap store null values?If yes, how many?What is singleton class? Give one example.Please describe the difference between 'int' and 'Integer',what is the purpose of 'Integer', where should we use 'Integer' vs 'int'?
sushilbehera
- Jan 29th, 2010
Yes HashMap can store null values. Any number of null values can be stored.Please note null can be stored multiple times as value however only one time as key.
fcasttro
- Mar 22nd, 2008
Map Won't allow duplicates, So It will accept one null value.HashMap map = new HashMap();map.put(null, null);map.put(null, null); map.put(null, null);After adding 3 null key / value pairs. It will...
-
What are the various ways of creating a thread. What is difference between them
theJavaGuy
- Jan 30th, 2010
Two ways-1. By extending Thread class2. By implementing Runnable interfaceWe extend the thread class when we are creating a new thread to assign a specific type of job to that thread. But if we want t...
gyanesh
- Jul 20th, 2005
The thread can be created either by extending the Thread class or implement the Runnable interface.
-
Singleton Pattern
Is it possible to have another instance in the case we are applying Singleton pattern? If yes, how?
Java Interview Questions
Ans