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The >> is right shift operator. It shifts bits towards right. For example: 5 >> 1 returns 2. It shifts one bit towards right and one bit is lost...
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Anonymous Inner Classes - An inner class without a name. It allows the declaration of the class, creation of the object and execution of the methods in it at one shot...
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In deep copy the copy operations would respect the semantics of the object. For example, copying an object along with the objects to which it refers to...
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The variables that are initialized at run time is called as dynamic variable...
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Java Transaction API is simple and more flexible to use. There are two levels in JTA API...
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Usually all operating systems have limitations for using the number of file handles, sockets etc., which can be open...
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Bootstrapping is a technique which activates more complex / complicated system of programs...
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A java applet application, a web application can run without main method. A Java program can run without using ‘ public static void main(String args[]) ‘ method by using a static block...
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Most of the web applications uses HTTProtocol. The user requests need to be received and processed through the HTTProtocol...
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Filters are powerful tools in servlet environment. Filters add certain functionality to the servlets apart from processing request and response paradigm of servlet processing...
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The tag is utilized for repeating the nested body content over a collection. Every element / object in a specified collection...
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The differences are: The DataInputStream works with the binary data, while the BufferedReader work with character data...
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The throw key word is used to explicitly throw an exception, while throws is utilized to handle checked exceptions for re-intimating the compiler that exceptions are being handled...
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Object serialization could be used in different ways: - Simple persistence of the object...
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The following are the similarities between an array and an ArrayList: - Both array and ArrayList can have duplicate elements in them...
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A bean can be determined whether is a stateless or stateful by analyzing the deployment descriptor ejb-jar.xml...
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The non-static block code is executed when a new class is instantiated. It executes before the constructor’s execution...
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The elements of HashMap can be sorted by using the static method Collections.sort()...
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A checked exception throws a block of code and represented by the throws keyword...
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Runnable interface is always preferred because, the class implementing it can implement as many interfaces as a developer can, and also extend another class...
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The prime difference is that pointers are to locate the address of the primitive variables only...
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Jasper Report is a very popular open source reporting tool written in Java. The reports can be seen on the screen, on a printer...
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Struts: Struts is a MVC pattern framework, Generating integration logic is done dynamically using Struts...
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The following is the process: - Type jar –cvf <.java file(s)>...
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Create an object of CrystalReport class. - Invoke aboutBox() method – for confirmation whether it is loaded properly - Establish the connection by using setConnect() method...
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Java does not support multiple inheritances. To avoid ambiguity problem – Diamonds of Death – and complexity of multiple inheritance...
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A private constructor is used when there is no requirement of another class to invoke that. It is used mostly in implementing singletons...
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In order to make a class immutable, the changing state of the class object must be restricted. This means restricting an assignment to a variable...
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Java methods are virtual by default. The virtual methods are the methods of subclasses...
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First ,the interface is to be defined. Defining an interface is placing the method signatures...
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A concrete class has concrete methods, i.e., with code and other functionality...
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Deep cloning builds a new reference and a new object to refer to a new object...
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The Applet tag has the following attributes...
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An applet class file may present in any of the folder. The .class file name along with its current path...
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To refresh a page in an applet window without flashing, the update() method is to be overridden...
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Java interacts with database using an API called Java Database Connectivity. JDBC is used to connect to the database...
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SQL Exception is associated with a failure of a SQL statement. This exception can be handled like an ordinary exception in a catch block...
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DatabaseMetaData provides comprehensive information about the database...
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ResultSetMetaData is a class which provides information about a result set that is returned by an executeQuery() method...
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A CacheRowSet object is a container for rows, that ‘caches’ the rows in the memory...
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A lock is a preventive software mechanism that other users can not use the data resource...
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All the objects which are the instances of the sub class Observable, maintains a list of observers...
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Synchronization is the process of allowing threads to execute one after another...
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Preemptive scheduling enables the highest priority task execution until waiting or dead states entered...
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A task’s priority is an integer value. This value is used to identify the relative order of execution with respect to other tasks...
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A single ampersand is used to perform ‘bit-wise AND’ operation on integer arguments. It constitutes the logical AND operator...
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Event-delegation model has two advantages over event-inheritance model...
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The wait() method makes the thread to halt, thus allowing other thread to perform...
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An event-listener interface allows describing the methods which must be implemented...
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To enable a particular event of an object, the enableEvents() method is utilized...
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The OS based file system services such as creating folders, files, verifying the permissions, changing file names etc...
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