Understanding isInfinite( ) and isNaN( ) in Java

By: Emiley J Emailed: 1598 times Printed: 2042 times    

Latest comments
By: rohit kumar - how this program is work
By: Kirti - Hi..thx for the hadoop in
By: Spijker - I have altered the code a
By: ali mohammed - why we use the java in ne
By: ali mohammed - why we use the java in ne
By: mizhelle - when I exported the data
By: raul - no output as well, i'm ge
By: Rajesh - thanx very much...
By: Suindu De - Suppose we are executing

Float and Double provide the methods isInfinite( ) and isNaN( ), which help when manipulating two special double and float values. These methods test for two unique values defined by the IEEE floating-point specification: infinity and NaN (not a number).

isInfinite( ) returns true if the value being tested is infinitely large or small in magnitude. isNaN( ) returns true if the value being tested is not a number. 

The following example creates two Double objects; one is infinite, and the other is not a
number:

// Demonstrate isInfinite() and isNaN()
class InfNaN {
public static void main(String args[]) {
Double d1 = new Double(1/0.);
Double d2 = new Double(0/0.);
System.out.println(d1 + ": " + d1.isInfinite() + ", " +
d1.isNaN());
System.out.println(d2 + ": " + d2.isInfinite() + ", " +
d2.isNaN());
}
}

This program generates the following output:

Infinity: true, false
NaN: false, true


Java Home | All Java Tutorials | Latest Java Tutorials

Sponsored Links

If this tutorial doesn't answer your question, or you have a specific question, just ask an expert here. Post your question to get a direct answer.



Bookmark and Share

Comments(1)


1. View Comment

A more complete description of the common pitfalls of using NaN in Java:

http://ppkwok.blogspot.co.uk/2012/11/java-cafe-1-never-write-nan-nan_24.html


View Tutorial          By: Phil at 2012-11-25 02:06:49

Your name (required):


Your email(required, will not be shown to the public):


Your sites URL (optional):


Your comments:



More Tutorials by Emiley J
Password must include both numeric and alphabetic characters - Magento
What is Hadoop?
Returning multiple values from a web service
Tomcat and httpd configured in port 8080 and 80
Java Webservices using Netbeans and Tomcat
Java WebService connected to Database
How to Deploy a Java Web Service
Call a webservice in Java
Java WebService - Create your first web service in Java
package javax.jws does not exist
Getting Started with Android
HTML5 Location - getCurrentPosition() in HTML5
HTML5 Canvas - Using Canvas in HTML5
HTML5 - Introduction
HTML5 Video - Handling video in HTML5

More Tutorials in Java
Update contents of a file within a jar file
Tomcat and httpd configured in port 8080 and 80
Java File
Java String
Count number of vowels, consonants and digits in a String in Java
Reverse a number in Java
Student marks calculation program in Java
Handling Fractions in Java
Calculate gross salary in Java
Calculate average sale of the week in Java
Vector in Java - Sample Program
MultiLevel Inheritance sample in Java
Multiple Inheritance sample in Java
Java program using Method Overriding
Java program to check if user input is an even number

More Latest News
Most Viewed Articles (in Java )
How to Send SMS using Java Program (full code sample included)
Using StringTokenizer in Java
InetAddress Example program in Java
Method Overriding in Java
How to use Iterator in Java
FileReader and FileWriter example program in Java
XML and Java - Parsing XML using Java Tutorial
wait(), notify() and notifyAll() in Java - A tutorial
Abstract classes in Java
How to use ArrayList in Java
Vector example in Java
Method Overloading (function overloading) in Java
Recursion in java
Read from a COM port using Java program
Garbage Collection in Java
Most Emailed Articles (in Java)
HTTPS Java - URL Connection program. Using HttpsURLConnection
Configuring a DataSource in Tomcat
Unicode vs ISO 10646?
What is Reflection? - getConstructors(), getFields(), and getMethods()
BufferedReader sample program in Java
append() in Java
The Basic Structure of a Simple Java program
Update contents of a file within a jar file
Tomcat and httpd configured in port 8080 and 80
Java File
Java String
Count number of vowels, consonants and digits in a String in Java
Reverse a number in Java
Student marks calculation program in Java
Handling Fractions in Java