.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

<< < … 6 7 8 9 10 11 12 13 14 15 16 … > >>   Sort: Date

How are this() and super() used with constructors?
How are this() and super() used with constructors? this() is used to invoke a constructor of the same class. super() is used to invoke a superclass constructor. 2012-08-01, 2766👍, 0💬

How to make an array copy from System?
How to make an array copy from System? There is a method called arraycopy in the System class. You can do it: System.arraycopy(sourceArray, srcOffset, destinationArray, destOffset, numOfElements2Copy); When you use this method, the destinationArray will be filled with the elements of sourceArray at ... 2012-09-04, 2765👍, 0💬

What's the main difference between a Vector and an ArrayList?
What's the main difference between a Vector and an ArrayList? Java Vector class is internally synchronized and ArrayList is not. 2012-06-22, 2765👍, 0💬

What is the relationship between clipping and repainting?
What is the relationship between clipping and repainting? When a window is repainted by the AWT painting thread, it sets the clipping regions to the area of the window that requires repainting. 2012-11-30, 2764👍, 0💬

How does Java handle integer overflows and underflows?
How does Java handle integer overflows and underflows? It uses those low order bytes of the result that can fit into the size of the type allowed by the operation. 2012-09-24, 2763👍, 0💬

If I write return at the end of the try block, will the finally block still execute?
If I write return at the end of the try block, will the finally block still execute? Yes even if you write return as the last statement in the try block and no exception occurs, the finally block will execute. The finally block will execute and then the control return. 2013-06-04, 2762👍, 0💬

What is the output of x &gt y? a:b = p*q when x=1,y=2,p=3,q=4?
What is the output of x &gt y? a:b = p*q when x=1,y=2,p=3,q=4? When this kind of question has been asked, find the problems you think is necessary to ask back before you give an answer. Ask if variables a and b have been declared or initialized. If the answer is yes. You can say that the syntax ... 2012-08-21, 2762👍, 0💬

What is the difference between the File and RandomAccessFile classes?
What is the difference between the File and RandomAccessFile classes? The File class encapsulates the files and directories of the local file system. The RandomAccessFile class provides the methods needed to directly access data contained in any part of a file. 2012-08-06, 2762👍, 0💬

What comes to mind when someone mentions a shallow copy in Java?
What comes to mind when someone mentions a shallow copy in Java? Object cloning. 2013-04-15, 2759👍, 0💬

How to define an Interface?
How to define an Interface? In Java Interface defines the methods but does not implement them. Interface can include constants. A class that implements the interfaces is bound to implement all the methods defined in Interface. Emaple of Interface: public interface sampleInterface { public void funct... 2012-05-24, 2758👍, 0💬

What is weak reference in Java
What is weak reference in Java A weak reference is one that does not prevent the referenced object from being garbage collected. You might use them to manage a HashMap to look up a cache of objects. A weak reference is a reference that does not keep the object it refers to alive. A weak reference is... 2012-09-10, 2756👍, 0💬

What kind of security tools are available in J2SE 5.0?
What kind of security tools are available in J2SE 5.0? There are three tools that can be used to protect application working within the scope of security policies set at remote sites. keytool -- used to manage keystores and certificates. jarsigner -- used to generate and verify JAR signatures. polic... 2012-09-03, 2756👍, 0💬

What is the benefit of subclass?
What is the benefit of subclass? Generally: The sub class inherits all the public methods and the implementation. The sub class inherits all the protected methods and their implementation. The sub class inherits all the default(non-access modifier) methods and their implementation. The sub class als... 2012-08-16, 2752👍, 0💬

What is the purpose of the System class?
What is the purpose of the System class? The purpose of the System class is to provide access to system resources. 2012-07-07, 2751👍, 0💬

Name Container classes
Name Container classes Window, Frame, Dialog, FileDialog, Panel, Applet, or ScrollPane 2013-04-02, 2748👍, 0💬

What is the difference between the JDK 1.02 event model and the event-delegation model introduced with JDK 1.1?
What is the difference between the JDK 1.02 event model and the event-delegation model introduced with JDK 1.1? The JDK 1.02 event model uses an event inheritance or bubbling approach. In this model, components are required to handle their own events. If they do not handle a particular event, the ev... 2012-12-27, 2745👍, 0💬

What is a native method?
What is a native method? A native method is a method that is implemented in a language other than Java. 2012-06-27, 2744👍, 0💬

In System.out.println(),what is System,out and println,pls explain?
In System.out.println(),what is System,out and println,pls explain? System is a predefined final class,out is a PrintStream object acting as a field member and println is a built-in overloaded method in the out object. 2012-08-20, 2742👍, 0💬

What restrictions are placed on method overriding?
What restrictions are placed on method overriding? Overridden methods must have the same name, argument list, and return type. The overriding method may not limit the access of the method it overrides. The overriding method may not throw any exceptions that may not be thrown by the overridden method... 2012-07-30, 2742👍, 0💬

Why Java does not support pointers?
Why Java does not support pointers? Because pointers are unsafe. Java uses reference types to hide pointers and programmers feel easier to deal with reference types without pointers. This is why Java and C-sharp shine. 2012-08-22, 2740👍, 0💬

Is the numeric promotion available in other plantform?
Is the numeric promotion available in other plantform? Yes. Because Java is implemented using a platform-independent virtual machine, bitwise operations always yield the same result, even when run on machines that use radically different CPUs. 2012-07-03, 2739👍, 0💬

What is an object's lock and which objects have locks?
What is an object's lock and which objects have locks? An object's lock is a mechanism that is used by multiple threads to obtain synchronized access to the object. A thread may execute a synchronized method of an object only after it has acquired the object's lock. All objects and classes have lock... 2012-11-07, 2735👍, 0💬

What are the different types of inner classes?
What are the different types of inner classes? There are four different types of inner classes in Java. They are: a)Static member classes , a static member class has access to all static methods of the parent, or top-level, class b) Member classes, the member class is instance specific and has acces... 2012-09-07, 2734👍, 0💬

What's the difference between the methods sleep() and wait()
What's the difference between the methods sleep() and wait() The code sleep(1000); puts thread aside for exactly one second. The code wait(1000), causes a wait of up to one second. A thread could stop waiting earlier if it receives the notify() or notifyAll() call. The method wait() is defined in th... 2012-09-11, 2733👍, 0💬

<< < … 6 7 8 9 10 11 12 13 14 15 16 … > >>   Sort: Date

.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