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What is the ResourceBundle class?
What is the ResourceBundle class? The ResourceBundle class is used to store locale-specific resources that can be loaded by a program to tailor the program's appearance to the particular locale in which it is being run. 2012-08-07, 2783👍, 0💬

What interface must an object implement before it can be written to a stream as an object?
What interface must an object implement before it can be written to a stream as an object? An object must implement the Serializable or Externalizable interface before it can be written to a stream as an object. 2012-08-06, 2662👍, 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, 2776👍, 0💬

What is the purpose of the enableEvents() method?
What is the purpose of the enableEvents() method? The enableEvents() method is used to enable an event for a particular object. Normally, an event is enabled when a listener is added to an object for a particular event. The enableEvents() method is used by objects that handle events by overriding th... 2012-08-03, 3224👍, 0💬

How can you force garbage collection?
How can you force garbage collection? You can't force GC, but could request it by calling System.gc(). JVM does not guarantee that GC will be started immediately. 2012-08-03, 2592👍, 0💬

What is the Set interface?
What is the Set interface? The Set interface provides methods for accessing the elements of a finite mathematical set. Sets do not allow duplicate elements. 2012-08-02, 2886👍, 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, 2855👍, 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, 2739👍, 0💬

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, 2782👍, 0💬

What class allows you to read objects directly from a stream?
What class allows you to read objects directly from a stream? The ObjectInputStream class supports the reading of objects from input streams. 2012-07-31, 5397👍, 0💬

Explain the usage of the keyword transient?
Explain the usage of the keyword transient? This keyword indicates that the value of this member variable does not have to be serialized with the object. When the class will be de-serialized, this variable will be initialized with a default value of its data type (i.e. zero for integers). 2012-07-31, 2705👍, 0💬

What is casting?
What is casting? There are two types of casting, casting between primitive numeric types and casting between object references. Casting between numeric types is used to convert larger values, such as double values, to smaller values, such as byte values. Casting between object references is used to ... 2012-07-30, 2917👍, 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, 2758👍, 0💬

Why would you use a synchronized block vs. synchronized method?
Why would you use a synchronized block vs. synchronized method? Synchronized blocks place locks for shorter periods than synchronized methods. 2012-07-27, 3003👍, 0💬

What is the purpose of the File class?
What is the purpose of the File class? The File class is used to create objects that provide access to the files and directories of a local file system. 2012-07-27, 2931👍, 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, 2770👍, 0💬

What is the difference between static and non-static variables?
What is the difference between static and non-static variables? A static variable is associated with the class as a whole rather than with specific instances of a class. Non-static variables take on unique values with each object instance. 2012-07-26, 2700👍, 0💬

What are the problems faced by Java programmers who don't use layout managers?
What are the problems faced by Java programmers who don't use layout managers? Without layout managers, Java programmers are faced with determining how their GUI will be displayed across multiple windowing systems and finding a common sizing and positioning that will work within the constraints impo... 2012-07-25, 2525👍, 0💬

What advantage do Java's layout managers provide over traditional windowing systems?
What advantage do Java's layout managers provide over traditional windowing systems? Java uses layout managers to lay out components in a consistent manner across all windowing platforms. Since Java's layout managers aren't tied to absolute sizing and positioning, they are able to accommodate platfo... 2012-07-25, 2687👍, 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, 2726👍, 0💬

How can a GUI component handle its own events?
How can a GUI component handle its own events? A component can handle its own events by implementing the required event-listener interface and adding itself as its own event listener. 2012-07-24, 2797👍, 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, 2788👍, 0💬

Name primitive Java types.
Name primitive Java types. The primitive types are byte, char, short, int, long, float, double, and boolean. 2012-07-23, 2786👍, 0💬

Does a class inherit the constructors of its superclass?
Does a class inherit the constructors of its superclass? A class does not inherit constructors from any of its superclasses. 2012-07-20, 2972👍, 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