Where and how can you use a private constuctor.

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Private constructor can be used if you do not want any other class to instanstiate it by using new. The instantiation is done from a static public method, which is used when dealing with the factory method pattern.

2012-08-17, 2477👍, 0💬

What is design by contract?
What is design by contract? The design by contract specifies the obligations of a method to any other methods that may use its services and also theirs to it. For example, the preconditions specify what the method required to be true when the method is called. Hence making sure that preconditions ar... 2012-08-15, 2766👍, 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, 2705👍, 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, 2696👍, 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, 2673👍, 0💬

What are use cases?
What are use cases? A use case describes a situation that a program might encounter and what behavior the program should exhibit in that circumstance. It is part of the analysis of a program. The collection of use cases should, ideally, anticipate all the standard circumstances and many of the extra... 2012-08-15, 2617👍, 0💬

How to add menushortcut to menu item?
How to add menushortcut to menu item? If you have a button instance called aboutButton, you may add menu short cut by calling aboutButton.setMnemonic('A'), so the user may be able to use Alt+A to click the button. 2012-08-17, 2562👍, 0💬

What is the difference between Swing and AWT components?
What is the difference between Swing and AWT components? AWT components are heavy-weight, whereas Swing components are lightweight. Heavy weight components depend on the local windowing toolkit. For example, java.awt.Button is a heavy weight component, when it is running on the Java platform for Uni... 2012-08-22, 2547👍, 0💬

Can you write a Java class that could be used both as an applet as well as an application?
Can you write a Java class that could be used both as an applet as well as an application? A. Yes. Add a main() method to the applet. 2012-08-20, 2541👍, 0💬

Where and how can you use a private constuctor.
Where and how can you use a private constuctor. Private constructor can be used if you do not want any other class to instanstiate it by using new. The instantiation is done from a static public method, which is used when dealing with the factory method pattern. 2012-08-17, 2478👍, 0💬

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