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Frequently Asked Questions

What is the base/super class for all classes in Java?

Java Language FAQs
Every class that is not extending another class is implicitly extending Object class in Java. So java.lang.Object class is the super most class of all classes in Java. Whereas an abstract class can contains abstract methods without any body but it can also have non-abstract methods with body (which is not possible with interfaces). However, interface and abstract classes can not have objects. They can only have object references which point to object of implementing class or sub class.

What are the Java Foundation Classes?

Java Foundation Classes (JFC)
The Java Foundation Classes (JFC) are a comprehensive set of GUI components and services which dramatically simplify the development and deployment of commercial-quality desktop and Internet/Intranet applications. See similar questions...

All Java classes are instances of class Class, can you give an example?

JavaChina: SCJP Questions & Answers by Roseanne Zhang (8...
It just tells you class A and class java.lang.System is an instanceof Class. //******************************* public class A { public static void main(String[] args) { boolean b; b = A.class instanceof Class; System.out.println(b); //true System.out.println(A.class); //class A b = System.class instanceof Class; System.out.println(b); //true System.out.println(System.class); //class java.lang.System // Interesting enough, Class.class is also an instance of Class b = Class. See similar questions...

What is Super Saturday? Do I need to register for two classes or can I just take one?

Frequently Asked Questions (FAQ) About The Children's Health...
Super Saturday is a free event held twice a year at CHEC that provides participants an opportunity to attend two sessions regarding a variety of topics in parenting and caregiving. The event begins with a light breakfast along with a chance to win free door prizes. Each participant chooses a class from each of the two tracks. The first session begins at 9 a.m. and the second session begins at 10:45. Continuing education credits are provided for these classes. See similar questions...

Are the Java Foundation Classes supported by major Java tools vendors?

Java Foundation Classes (JFC)
Absolutely; we have close relationships with all the major Java development environment vendors. As part of the Java Platform, JFC is available in all major Java development tools. A listing of tool providers can be found on the http://java.sun.com/beans site under the product directory. See similar questions...

How can I protect derived classes from breaking when I change the internal parts of the base class?

Inheritance -- basics, C++ FAQ Lite
Unless you expect all your derived classes to be built by your own team, you should declare your base class's data members as private and use protected inline access functions by which derived classes will access the private data in the base class. This way the private data declarations can change, but the derived class's code won't break (unless you change the protected access functions). See similar questions...

How can I probe Java classes loaded with a custom class loader and so not in the CLASSPATH?

RootCause/Aprobe FAQ
You will find that when you use "Open Associated Workspace" it imports only the jars in the class path and and so other classes that might be explicitly loaded do not appear in the Trace Setup. This can be easily remedied. So long as the class loader follows the standard model for class loader inheritance (e.g. See similar questions...

Do the Java Foundation Classes run better on one platform than others?

Java Foundation Classes (JFC)
Because the Java Foundation Classes are designed to be truly cross-platform, they run equally well on all Java Compatible Platforms. See similar questions...

How can I find out what classes are available and what is covered in each class?

Women and Children - Lactation - Carolinas Healthcare
There is a description of each class in your hospital brochure and you may also discuss your options with the Babyline representative. See similar questions...

Can I take a class on Java from you?

Professor Smiley's Java FAQ's
Yes, I offer a Java Study group, which is not quite as formal as a class. For more information, check this link: See similar questions...

Do I need Java to use Base?

FAQ (Base) - OpenOffice.org Wiki
Not strictly. Base is an application which enables you to access the database of your choice - this can be local databases like flat files, dBase files, server databases like MySQL, PostgreSQL, Oracle, MS SQL Server, plus every database for which you have an ODBC , JDBC, or ADO driver. However, by default OpenOffice.org creates all-in-one database files, using the HSQLDB database engine, which in fact is a Java database. So, if you have a Java Runtime Environment (JRE) installed, OpenOffice. See similar questions...

How do the Java Foundation Classes make developers' lives easier?

Java Foundation Classes (JFC)
The Java Foundation Classes substantially reduces the amount of programming needed by providing many reusable and cross-platform UI components. In addition, foundation services offered in JFC enable developers to build richer solutions with fewer lines of code. The last and most important point is that developers don't have to worry that their application will only perform well on one platform. JFC is designed to be 100% cross-platform. See similar questions...

Are java class files acceptable?

NIST Iris Challenge Evaluation FAQ
Windows Server 2003 SP1 and Fedora 3.0 will be supported. All executables must be able to be called from the command line. Java is not installed on machines in the Face and Iris Test Lab. Windows Server 2003 SP1 and Fedora 3.0 will be supported. All executables must be able to be called from the command line. All supporting Matlab libraries must be included with your submission. Matlab is not installed on machines in the Face and Iris Test Lab. See similar questions...

Will you make this class super easy?

History 370: FAQ
Well, when I was a student, the easiest classes were the ones I enjoyed, and so lectures/essays did not really feel like "work." I'll do my best to make the class like that. If you mean that you just want me to hand out A grades like candy, that's not going to happen. See similar questions...

What if I have to miss a class or cannot take all the classes?

Yoga Yoga Kundalini Teacher Training FAQ
Nearly everyone misses a class at some time. If you cannot attend a class, you will be allowed to make up a missed class with other assignments and training that is part of the teacher training program. We do have guidelines for how many classes you can miss and there are a few classes where you may have to wait and repeat them in order to complete your training, so please ask us if you have any concerns before registering. See similar questions...

Books: When will I receive my books or class materials for my classes?

USD Study Abroad
For U.S. students: Generally books are mailed around May 1st to the temporary address you listed on your application. Should you change address, you will need to notify us of your new address ASAP. If you leave the U.S. before you receive your books, you, the student, would pay USD to Fed Ex them to you in Europe. Fed Ex can cost anywhere from $50-$200 depending on your classes. See similar questions...

Law Classes: Can I drop a class once I am in Florence?

USD Study Abroad
Yes, however, there will be no refund of any monies paid. Be aware that if you took out loans, you may have to repay monies back to your lender. Contact the Financial Aid Office at your home school for further information. Thomas Cooley and Indiana Univ-Bloomington students must obtain permission to drop classes from either Prof Bill Weiner-Thomas Cooley or Dean Len Fromm-Indiana. Then Prof Weiner or Dean Fromm will alert USD-San Diego to the approved change. See similar questions...

I forgot the password for one of my classes. How can I open that class?

Frequently Asked Questions
You can enter your registration code (the six digit number you received when you paid for Gradekeeper) in place of your password. You should use your registration code as your old password to enter a new password. Write the new password down and keep it in a safe place. You must use the registration code that was used on that computer to register Gradekeeper. See similar questions...

If subclass overrides the methods in super class, can subclass call the super class method?

JavaChina, SCJP Questions & Answers by Roseanne Zhang (3...
Yes, you can. However, that is the subclass it self's choice. Outsider does not have this choice. You can see it clearly from the following example. class Sup { void m1() { System.out.println("m1 in super"); } } class Sub extends Sup{ void m1() { super.m1(); System.out.println("m1 in sub"); } } public class T{ public static void main(String arg[]) { new Sub().m1(); } } See similar questions...

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