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What is the difference between the &gt&gt and &gt&gt&gt operators?
What is the difference between the &gt&gt and &gt&gt&gt operators? The &gt&gt operator carries the sign bit when shifting right. The &gt&gt&gt zero-fills bits that have been shifted out. 2012-09-26, 2430👍, 0💬

What is an Iterator interface?
What is an Iterator interface? The Iterator interface is used to step through the elements of a Collection. 2012-09-26, 2291👍, 0💬

What modifiers may be used with an inner class that is a member of an outer class?
What modifiers may be used with an inner class that is a member of an outer class? A (non-local) inner class may be declared as public, protected, private, static, final, or abstract. 2012-09-25, 2421👍, 0💬

What is the Vector class?
What is the Vector class? The Vector class provides the capability to implement a growable array of objects 2012-09-25, 2400👍, 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, 2619👍, 0💬

What is the List interface?
What is the List interface? The List interface provides support for ordered collections of objects. 2012-09-24, 2574👍, 0💬

which characters may be used as the second character of an identifier, but not as the first character of an identifier?
which characters may be used as the second character of an identifier, but not as the first character of an identifier? The digits 0 through 9 may not be used as the first character of an identifier but they may be used after the first character of an identifier. 2012-09-21, 2476👍, 0💬

What is the Collections API?
What is the Collections API? The Collections API is a set of classes and interfaces that support operations on collections of objects. 2012-09-21, 2532👍, 0💬

What state does a thread enter when it terminates its processing?
What state does a thread enter when it terminates its processing? When a thread terminates its processing, it enters the dead state. 2012-09-20, 2773👍, 0💬

Which containers use a FlowLayout as their default layout?
Which containers use a FlowLayout as their default layout? The Panel and Applet classes use the FlowLayout as their default layout. 2012-09-20, 2475👍, 0💬

What method is used to specify a container's layout?
What method is used to specify a container's layout? The setLayout() method is used to specify a container's layout. 2012-09-19, 2702👍, 0💬

What is the preferred size of a component?
What is the preferred size of a component? The preferred size of a component is the minimum component size that will allow the component to display normally. 2012-09-19, 2525👍, 0💬

Is null a keyword?
Is null a keyword? The null value is not a keyword. 2012-09-18, 2681👍, 0💬

What is new with the stop(), suspend() and resume() methods in JDK 1.2??
What is new with the stop(), suspend() and resume() methods in JDK 1.2?? The stop(), suspend() and resume() methods have been deprecated in JDK 1.2. 2012-09-18, 2817👍, 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, 2770👍, 0💬

What is synchronization and why is it important?
What is synchronization and why is it important? With respect to multithreading, synchronization is the capability to control the access of multiple threads to shared resources. Without synchronization, it is possible for one thread to modify a shared object while another thread is in the process of... 2012-09-17, 2686👍, 0💬

Why do threads block on I/O?
Why do threads block on I/O? Threads block on I/O (that is enters the waiting state) so that other threads may execute while the I/O Operation is performed. 2012-09-14, 2967👍, 0💬

Which containers use a border Layout as their default layout?
Which containers use a border Layout as their default layout? The window, Frame and Dialog classes use a border layout as their default layout. 2012-09-13, 3719👍, 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, 2797👍, 0💬

ArithmeticException?
ArithmeticException? The ArithmeticException is thrown when integer is divided by zero or taking the remainder of a number by zero. It is never thrown in floating-point operations. 2012-09-12, 2747👍, 0💬

Why do we need to use getSystemResource() and getSystemResources() method to load resources?
Why do we need to use getSystemResource() and getSystemResources() method to load resources? Because we want to look for resources strictly from the system classpath, These methods use the system ClassLoader to locate resources, which gives you stricter control of the resources used by the applicati... 2012-09-12, 2989👍, 0💬

The following statement prints true or false, why?
The following statement prints true or false, why? byte[] a = { 1, 2, 3 };, byte[] b = (byte[]) a.clone(); System.out.println(a == b); The false will be printed out. Because the two arrays have distinctive memory addresses. Starting in Java 1.2, we can use java.util.Arrays.equals(a, b) to compare wh... 2012-09-11, 2692👍, 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, 2630👍, 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, 2636👍, 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