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What do you understand by Synchronization?
What do you understand by Synchronization? Synchronization is a process of controlling the access of shared resources by the multiple threads in such a manner that only one thread can access one resource at a time. In non synchronized multithreaded application, it is possible for one thread to modif... 2012-05-22, 2697👍, 0💬

Can we use System.arraycopy() method to copy the same array?
Can we use System.arraycopy() method to copy the same array? Yes, you can. The source and destination arrays can be the same if you want to copy a subset of the array to another area within that array. 2012-09-04, 2696👍, 0💬

What is the difference between interface and abstract class?
What is the difference between interface and abstract class? interface contains methods that must be abstract; abstract class may contain concrete methods. interface contains variables that must be static and final; abstract class may contain non-final and final variables. members in an interface ar... 2012-07-10, 2695👍, 0💬

How to create a thread in a program?
How to create a thread in a program? You have two ways to do so. First, making your class "extends" Thread class. Second, making your class "implements" Runnable interface. Put jobs in a run() method and call start() method to start the thread. 2012-06-11, 2693👍, 0💬

What is a transient variable?
What is a transient variable? A transient variable is a variable that may not be serialized. 2012-09-13, 2689👍, 0💬

Name the containers which uses Border Layout as their default layout?
Name the containers which uses Border Layout as their default layout? Containers which uses Border Layout as their default are: window, Frame and Dialog classes. 2012-05-21, 2687👍, 0💬

What is the difference between a Choice and a List?
What is the difference between a Choice and a List? A Choice is displayed in a compact form that requires you to pull it down to see the list of available choices. Only one item may be selected from a Choice. A List may be displayed in such a way that several List items are visible. A List supports ... 2012-12-24, 2683👍, 0💬

What is the difference between preemptive scheduling and time slicing?
What is the difference between preemptive scheduling and time slicing? Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Under time slicing, a task executes for a predefined slice of time and the... 2012-06-26, 2682👍, 0💬

What happens when a thread cannot acquire a lock on an object?
What happens when a thread cannot acquire a lock on an object? If a thread attempts to execute a synchronized method or synchronized statement and is unable to acquire an object's lock, it enters the waiting state until the lock becomes available. 2012-06-18, 2680👍, 0💬

What is an IO filter?
What is an IO filter? An IO filter is an object that reads from one stream and writes to another, usually altering the data in some way as it is passed from one stream to another. 2012-08-02, 2679👍, 0💬

What is the Properties class?
What is the Properties class? The properties class is a subclass of Hashtable that can be read from or written to a stream. It also provides the capability to specify a set of default values to be used. 2012-07-05, 2676👍, 0💬

Can a lock be acquired on a class?
Can a lock be acquired on a class? Yes, a lock can be acquired on a class. This lock is acquired on the class's Class object. 2012-09-17, 2675👍, 0💬

What is design by contract?
What is design by contract? The design by contract specifies the obligations of a method to any other methods that may use its services and also theirs to it. For example, the preconditions specify what the method required to be true when the method is called. Hence making sure that preconditions ar... 2012-08-15, 2675👍, 0💬

What is the difference between yielding and sleeping?
What is the difference between yielding and sleeping? When a task invokes its yield() method, it returns to the ready state. When a task invokes its sleep() method, it returns to the waiting state. 2012-06-15, 2675👍, 0💬

What is a static method?
What is a static method? A static method is a method that belongs to the class rather than any object of the class and doesn't apply to an object or even require that any objects of the class have been instantiated. 2012-07-11, 2672👍, 0💬

What is an Iterator interface?
What is an Iterator interface? The Iterator interface is used to step through the elements of a Collection. 2012-06-21, 2671👍, 0💬

Which class should you use to obtain design information about an object?
Which class should you use to obtain design information about an object? The Class class is used to obtain information about an object's design. 2012-07-23, 2670👍, 0💬

What is the differnce between final, finally and finalize?
What is the differnce between final, finally and finalize? final is used for making a class no-subclassable, and making a member variable as a constant which cannot be modified. finally is usuall used to release all the resources utilized inside the try block. All the resources present in the finali... 2012-09-10, 2669👍, 0💬

What is the Vector class?
What is the Vector class? The Vector class provides the capability to implement a growable array of objects 2012-06-20, 2669👍, 0💬

What is the Map interface?
What is the Map interface? The Map interface replaces the JDK 1.1 Dictionary class and is used associate keys with values. 2012-07-20, 2667👍, 0💬

What is the advantage of the event-delegation model over the earlier event-inheritance model?
What is the advantage of the event-delegation model over the earlier event-inheritance model? The event-delegation model has two advantages over the event-inheritance model. First, it enables event handling to be handled by objects other than the ones that generate the events (or their containers). ... 2012-10-30, 2665👍, 0💬

Name Component subclasses that support painting?
Name Component subclasses that support painting? The Canvas, Frame, Panel, and Applet classes support painting. 2012-06-26, 2660👍, 0💬

Is Java a super set of JavaScript?
Is Java a super set of JavaScript? No. They are completely different. Some syntax may be similar. 2012-08-13, 2658👍, 0💬

When is the ArithmeticException throwQuestion: What is the GregorianCalendar class?
When is the ArithmeticException throwQuestion: What is the GregorianCalendar class? The GregorianCalendar provides support for traditional Western calendars. 2012-07-04, 2658👍, 0💬

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.NET C C++ CSS DBA General HTML Java JavaScript JSP JUnit MySQL Networking Oracle Perl Perl PHP PL/SQL RSS Software QA SQL Server Struts Unix Windows XHTML XML