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Explain the Inheritance principle.
Explain the Inheritance principle. Inheritance is the process by which one object acquires the properties of another object. 2013-03-01, 2478👍, 0💬

How can the Checkbox class be used to create a radio button?
How can the Checkbox class be used to create a radio button? By associating Checkbox objects with a CheckboxGroup. 2012-12-18, 2477👍, 0💬

Which Component subclass is used for drawing and painting?
Which Component subclass is used for drawing and painting? Canvas 2013-01-30, 2476👍, 0💬

What is the purpose of the Runtime class?
What is the purpose of the Runtime class? The purpose of the Runtime class is to provide access to the Java runtime system. 2012-10-22, 2476👍, 0💬

What is the main difference between Java platform and other platforms?
What is the main difference between Java platform and other platforms? The Java platform differs from most other platforms in that it's a software-only platform that runs on top of other hardware-based platforms. The Java platform has three elements: Java programming language The Java Virtual Machin... 2013-02-19, 2475👍, 0💬

What is a local, member and a class variable?
What is a local, member and a class variable? Variables declared within a method are "local" variables. Variables declared within the class i.e not within any methods are "member" variables (global variables). Variables declared within the class i.e not within any methods and are defined as "static"... 2013-02-06, 2474👍, 0💬

Which class is the superclass for every class.
Which class is the superclass for every class. Object. 2013-04-11, 2473👍, 0💬

Can an object be garbage collected while it is still reachable?
Can an object be garbage collected while it is still reachable? A reachable object cannot be garbage collected. Only unreachable objects may be garbage collected.. 2012-11-12, 2473👍, 0💬

How can one prove that the array is not null but empty using one line of code?
How can one prove that the array is not null but empty using one line of code? Print args.length. It will print 0. That means it is empty. But if it would have been null then it would have thrown a NullPointerException on attempting to print args.length. 2013-05-07, 2472👍, 0💬

What are runtime exceptions?
What are runtime exceptions? Runtime exceptions are those exceptions that are thrown at runtime because of either wrong input data or because of wrong business logic etc. These are not checked by the compiler at compile time. 2013-05-28, 2471👍, 0💬

What modifiers may be used with an interface declaration?
What modifiers may be used with an interface declaration? An interface may be declared as public or abstract. 2012-12-04, 2471👍, 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. 2012-11-30, 2470👍, 0💬

Is sizeof a keyword?
Is sizeof a keyword? The sizeof operator is not a keyword in Java. 2013-04-11, 2469👍, 0💬

What is the Java API?
What is the Java API? The Java API is a large collection of ready-made software components that provide many useful capabilities, such as graphical user interface (GUI) widgets. 2013-02-20, 2469👍, 0💬

Difference between Vector and ArrayList?
Difference between Vector and ArrayList? Vector is synchronized whereas arraylist is not. 2013-04-26, 2468👍, 0💬

What is the Java Virtual Machine?
What is the Java Virtual Machine? The Java Virtual Machine is a software that can be ported onto various hardware-based platforms. 2013-02-20, 2467👍, 0💬

What is the Collection interface?
What is the Collection interface? The Collection interface provides support for the implementation of a mathematical bag - an unordered collection of objects that may contain duplicates. 2012-12-10, 2467👍, 0💬

What is Externalizable?
What is Externalizable? Externalizable is an Interface that extends Serializable Interface. And sends data into Streams in Compressed Format. It has two methods, writeExternal(ObjectOuput out) and readExternal(ObjectInput in) 2013-06-18, 2466👍, 0💬

What method must be implemented by all threads?
What method must be implemented by all threads? All tasks must implement the run() method, whether they are a subclass of Thread or implement the Runnable interface. 2013-01-29, 2466👍, 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... 2012-12-10, 2464👍, 0💬

What type of parameter passing does Java support?
What type of parameter passing does Java support? In Java the arguments are always passed by value . 2013-05-16, 2463👍, 0💬

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. 2013-01-18, 2463👍, 0💬

What interface is extended by AWT event listeners?
What interface is extended by AWT event listeners? All AWT event listeners extend the java.util.EventListener interface. 2013-01-14, 2463👍, 0💬

Which package is always imported by default?
Which package is always imported by default? The java.lang package is always imported by default. 2013-01-09, 2463👍, 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