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What is the actual value?

The actual value returned by this program is provided by a static final variable in the Double class named POSITIVE_INFINITY .

(There is also a value for NEGATIVE_INFINITY, which is the value that would be returned if one of the operands were a negative value.)

Is this a better approach?

Is this a better approach than throwing an exception as is the case for integer divide by zero?

I will let you be the judge of that.

In either case, you can test the right operand before the divide to assure that it isn't equal to zero.

Cannot use exception handling in this case

For floating divide by zero, you cannot handle the problem by using try-catch.

However, you can test the result following the divide to see if it is equal to either of the infinity values mentioned above.

Back to Question 9

Answer 8

B. Runtime Error

Explanation 8

Dividing by zero

This program attempts to divide the int value of 11 by the int value of zero.

Integer divide by zero is not allowed

This produces a runtime error and terminates the program.

The runtime error is as follows under JDK 1.3:

Exception in thread "main" java.lang.ArithmeticException: / by zero at Worker.doMixed(Ap017.java:14)at Ap017.main(Ap017.java:6)

Two ways to deal with this sort of problem

One way is to test the right operand before each divide operation to assure that it isn't equal to zero, and to take appropriate action if it is.

A second (possibly preferred) way is to use exception handling and surround the divide operation with a try block, followed by a catch block for the type


The code in the catch block can be designed to deal with the problem if it occurs. (Exception handling will be discussed in a future module.)

Back to Question 8

Answer 7

E. 33

Explanation 7

Integer truncation

This program illustrates the integer truncation that results when the division operator is applied to operands of the integer types.

The result of simple long division

We all know that when we divide 101 by 3, the result is 33.666666 with the sixes extending out to the limit of our arithmetic accuracy.

The result of rounding

If we round the result to the next closest integer, the result is 34.

Integer division does not round

However, when division is performed using operands of integer types in Java, the fractional part is simply discarded (not rounded) .

The result is the whole number result without regard for the fractional part or the remainder.

Thus, with integer division, 101/3 produces the integer value 33.

If either operand is a floating type ...

If either operand is one of the floating types,

  • the integer operand will be converted to the floating type,
  • the result will be of the floating type, and
  • the fractional part of the result will be preserved to some degree of accuracy

Back to Question 7

Answer 6

D. -2147483647

Explanation 6

Danger, integer overflow ahead!

This program illustrates a very dangerous situation involving arithmetic using operands of integer types. This situation involves a conditioncommonly known as integer overflow .

Questions & Answers

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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