The compiler supplies a default constructor for a class if no other constructors areprovided.

ziaur rahuman

• Dec 12th, 2005

If there is no other constructor i.e, if user didn't defined the constructor default constructor will be created and called up

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The Object class is the highest-level class in the Java class hierarchy. The Class class isused to representthe classes and interfaces that are loaded by a Java program.

mprodge

 Profile Answers by mprodge Questions by mprodge

• Mar 22nd, 2006

Objects and classes are mainly used for reducing the repeatitiveness in programming.These are the fundamental units of oop programmings.It reduces the time and complexity of programming..........

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Swing is an extension of, and not a replacement for the AWT. There is some overlap between AWT and Swing (for example a Swing JButton component might be viewed as an improved functional replacement for an AWT Button component.) One of the advantages of Swing components is that because the components are not rendered on the screen by the operating system, the look and feel of a component does not change...

Gaurav Sharma

• Oct 25th, 2006

One more thing i want to add in in this answer that AWT is written in pure C and swing is written in java.

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According to JavaSoft, "A Java Bean is a reusable software component that can be manipulated visually in a builder tool."

prasanna_b2001@yahoo.com

 Profile Answers by prasanna_b2001@yahoo.com Questions by prasanna_b2001@yahoo.com

• Dec 19th, 2005

Java bean is a simple java class with setter and getter methods which can hold data.

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The main reason you cannot create a button by Button bt1= "abc"; is because "abc" is a literal string (something slightly different than a String object, bytheway)and bt1 is a Button object. That simple. The only object in Java that can be assigned a literal String is java.lang.String. Important to note that you are NOT calling a java.lang.String constuctor when you type String s = "abc";For example String...

sandy4u_bits2002

 Profile Answers by sandy4u_bits2002 Questions by sandy4u_bits2002

• Apr 4th, 2006

sir   string x="abc" string y ="abc"  i dont think that here they refer to same object.I have refer the complete reference..automatically when u asign stringz like this ..different objects will b created.so give me answer gain indetail

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Java's interface mechanism can be used to implement multiple inheritance, with one important difference from c++ way of doing MI: the inherited interfaces must be abstract. This obviates the need to choose between different implementations, as with interfaces there are no implementations.

ketaketi

• Oct 20th, 2006

Class A extends B implements C

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1. Applets can be embedded in HTML pages and downloaded over the Internet whereas Applications have no special support in HTML for embedding or downloading.2. Applets can only be executed inside a java compatible container, such as a browser or appletviewer whereas Applications are executed at command line by java.exe or jview.exe.3. Applets execute under strict security limitations that disallow certain...

MANISHA PATHAK

 Profile Answers by MANISHA PATHAK Questions by MANISHA PATHAK

• Oct 26th, 2006

An Applet is a program which is intended to be transmitted over internet and An Application is a standalone programs which can run on any machine where JVM is installed.

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Synchronize is used when u want to make ur methods thread safe. The disadvantage of synchronise is it will end up in slowing down the program. Also if not handled properly it will end up in dead lock.1. Only use (and minimize it's use)synchronization when writing multithreaded code as there is a speed (up to five to six time slower, depending on the execution time of the synchronized/nonsynchronized...

Kish

• Feb 15th, 2006

Synchronize on a method basically locks up the whole class, the other methods are not accessible till the thread is done with the transcation

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Public – any other class from any package can instantiate and execute the classes and methodsProtected – only subclasses and classes inside of the package can access the classes and methodsPrivate – the original class is the only class allowed to execute the methods

babu

• Apr 5th, 2006

Access specifiers: "public", "protected", "private",Default"

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FINAL for a variable : value is constantFINAL for a method : cannot be overriddenFINAL for a class : cannot be derived

vmshenoy

 Profile Answers by vmshenoy Questions by vmshenoy

• Feb 9th, 2006

Final when written in front of a variable it means that the value assigned to that variable is constant.It is similar to const keyword as in C.eg final int a=8;This means that variable a ,through out ...

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Prakash

• Apr 8th, 2005

FileReader FR = new FileReader("C:/input.txt"); BufferedReader reader = new BufferedReader(FR); //Used for reading line by line while( (reader.readLine())!=null) {  //Write ur logic here }

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You would create interfaces when you have two or more functionalities talking to each other. Doing it this way help you in creating a protocol between the parties involved.

Murugesan Surandai

• May 6th, 2005

In Object Oriented programming, interfaces are getting abstract data from objects ie getting common attrubute and common behaviour from other objects.

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The Reader/Writer class hierarchy is character-oriented, and the InputStream/OutputStream class hierarchy is byte-oriented.

sfsfs

• May 18th, 2006

The Reader/Writer class hierarchy is character-oriented, and the InputStream/OutputStream class hierarchy is byte-oriented.

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The serialization is a kind of mechanism that makes a class or a bean persistence by having its properties or fields and state information saved and restored to and from storage.

rajesh_gint

 Profile Answers by rajesh_gint Questions by rajesh_gint

• Jan 9th, 2006

the process of capturing the state of the object and sending it to a physical diskfile is called serializationeitther phisical diskfile or flatfile or database.this can be done by implementing the serializable interface,and using object o/p and file o/p streams.

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lucas

 Profile Answers by lucas Questions by lucas

• Nov 28th, 2005

Authentication is the process by which a user proves their identity to a system. This proof can take several forms:# A password known only to the user.# A digital certificate (a secret key c...

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pravash

• Jun 8th, 2005

An XSLT file can include another XSLT file using the element. The href attribute value is a URI reference identifying the file to be included. The relative URI is resolved with relation to the base U...

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manohar

• May 20th, 2006

By using Driver Manager.get Connection()

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Answer posted by pravash on 2005-06-08 02:16:34: The PreparedStatement is a slightly more powerful version of a Statement, and should always be at least as quick and easy to handle as a Statement.  The PreparedStatement may be parametrizednull  Most relational databases handles a JDBC / SQL query in four steps:  1.Parse the incoming SQL query  2. Compile the SQL query  3....

pravash

• Jun 8th, 2005

The PreparedStatement is a slightly more powerful version of a Statement, and should always be at least as quick and easy to handle as a Statement.  The PreparedStatement may be parametrizednull&...

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Jagadeesh

• Jun 15th, 2005

It is default point location is before the first row

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chandra

• Jun 19th, 2005

Four types of Drivers  a) JDBC-ODBC Bridge driver  b) Native API Partly-Java driver  c) JDBC-Net Pure Java driver  d) Native-Protocol Pure Java driver 

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