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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, 2730👍, 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, 2730👍, 0💬

Is "abc" a primitive value?
Is "abc" a primitive value? The String literal "abc" is not a primitive value. It is a String object. 2012-12-03, 2728👍, 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, 2728👍, 0💬

How can a subclass call a method or a constructor defined in a superclass?
How can a subclass call a method or a constructor defined in a superclass? Use the following syntax: super.myMethod(); To call a constructor of the superclass, just write super(); in the first line of the subclass's constructor. 2012-07-05, 2728👍, 0💬

Is the ternary operator written x : y ? z or x ? y : z ?
Is the ternary operator written x : y ? z or x ? y : z ? It is written x ? y : z. 2012-11-13, 2726👍, 0💬

What is the difference between shallow copy and deep copy?
What is the difference between shallow copy and deep copy? Shallow copy shares the same reference with the original object like cloning, whereas the deep copy get a duplicate instance of the original object. If the shallow copy has been changed, the original object will be reflected and vice versa. 2012-08-24, 2726👍, 0💬

What is the difference between the paint() and repaint() methods?
What is the difference between the paint() and repaint() methods? The paint() method supports painting via a Graphics object. The repaint() method is used to cause paint() to be invoked by the AWT painting thread. 2012-07-26, 2726👍, 0💬

Can an object's finalize() method be invoked while it is reachable?
Can an object's finalize() method be invoked while it is reachable? An object's finalize() method cannot be invoked by the garbage collector while the object is still reachable. However, an object's finalize() method may be invoked by other objects. 2012-10-03, 2724👍, 0💬

How can I print numbers with commas separating the thousands? What about currency formatted numbers?
How can I print numbers with commas separating the thousands? What about currency formatted numbers? The functions in &lt;locale.h> begin to provide some support for these operations, but there is no standard C function for doing either task. (In Standard C, the only thing printf does in respons... 2015-11-02, 2721👍, 0💬

What is a Strong Name?
What is a Strong Name? A strong name consists of the assembly's identity its simple text name, version number, and culture information (if provided) plus a public key and a digital signature. It is generated from an assembly file (the file that contains the assembly manifest, which in turn contains ... 2013-10-08, 2719👍, 0💬

Does garbage collection guarantee that a program will not run out of memory?
Does garbage collection guarantee that a program will not run out of memory? No, it doesn't. It is possible for programs to use up memory resources faster than they are garbage collected. It is also possible for programs to create objects that are not subject to garbage collection. 2012-06-25, 2717👍, 0💬

Can I stop JSP execution while in the midst of processing a request?
Can I stop JSP execution while in the midst of processing a request? Yes. Preemptive termination of request processing on an error condition is a good way to maximize the throughput of a high-volume JSP engine. The trick (asuming Java is your scripting language) is to use the return statement when y... 2013-07-29, 2714👍, 0💬

Parsers? DOM vs SAX parser
Parsers? DOM vs SAX parser Parsers are fundamental xml components, a bridge between XML documents and applications that process that XML. The parser is responsible for handling xml syntax, checking the contents of the document against constraints established in a DTD or Schema. DOM 1. Tree of nodes ... 2012-08-23, 2714👍, 0💬

What is the purpose of the finally clause of a try-catch-finally statement?
What is the purpose of the finally clause of a try-catch-finally statement? The finally clause is used to provide the capability to execute code no matter whether or not an exception is thrown or caught. 2012-07-09, 2714👍, 0💬

What is the catch or declare rule for method declarations?
What is the catch or declare rule for method declarations? If a checked exception may be thrown within the body of a method, the method must either catch the exception or declare it in its throws clause. 2012-10-11, 2713👍, 0💬

How is it possible for two String objects with identical values not to be equal under the == operator? How are this() and super(
How is it possible for two String objects with identical values not to be equal under the == operator? How are this() and super() used with constructors? The == operator compares two objects to determine if they are the same objects in memory. It is possible for two String objects to have the same v... 2012-08-01, 2712👍, 0💬

Why does Perl not have overloaded functions?
Why does Perl not have overloaded functions? Because you can inspect the argument count, return context, and object types all by yourself. In Perl, the number of arguments is trivially available to a function via the scalar sense of @_, the return context via wantarray(), and the types of the argume... 2013-09-06, 2710👍, 0💬

How many JSP scripting elements are there and what are they?
How many JSP scripting elements are there and what are they? There are three scripting language elements: declarations, scriptlets, expressions. 2013-07-16, 2709👍, 0💬

How do you call unmanaged methods from your .NET code through PInvoke?
How do you call unmanaged methods from your .NET code through PInvoke? Supply a DllImport attribute. Declare the methods in your .NET code as static extern. Do not implement the methods as they are implemented in your unmanaged code, you’re just providing declarations for method signatures. 2014-12-08, 2705👍, 0💬

malloc is returning crazy pointer values ...
malloc is returning crazy pointer values, I have included the line extern void *malloc(); before I call it. malloc accepts an argument of type size_t, and size_t may be defined as unsigned long. If you are passing ints (or even unsigned ints), malloc may be receiving garbage (or similarly if you are... 2016-04-15, 2704👍, 0💬

How are the elements of a GridBagLayout organized?
How are the elements of a GridBagLayout organized? The elements of a GridBagLayout are organized according to a grid. However, the elements are of different sizes and may occupy more than one row or column of the grid. In addition, the rows and columns may have different sizes. 2012-07-24, 2704👍, 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. 2012-06-20, 2704👍, 0💬

I want to expose my .NET objects to COM objects. Is that possible?
I want to expose my .NET objects to COM objects. Is that possible? Yes, but few things should be considered first. Classes should implement interfaces explicitly. Managed types must be public. Methods, properties, fields, and events that are exposed to COM must be public. Types must have a public de... 2014-12-10, 2702👍, 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