• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Tim Cooke
  • Campbell Ritchie
  • Ron McLeod
  • Junilu Lacar
  • Liutauras Vilda
Sheriffs:
  • Paul Clapham
  • Jeanne Boyarsky
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Piet Souris
  • Carey Brown
Bartenders:
  • Jesse Duncan
  • Frits Walraven
  • Mikalai Zaikin

Identify whether the string is a actual string or hexadecimal.

 
Ranch Hand
Posts: 42
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi,

I have one string variable temp which holds either String or hexadecimal string.
for e.g:

The next code should identify whether its a hexadecimal or string. Based on the identification I need to call another method.

Could some one suggest me the way to do this.

Thanks in Advance.
Shan
 
Ranch Hand
Posts: 2908
1
Spring Java Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
http://codingforums.com/showthread.php?t=68429
 
shan raj
Ranch Hand
Posts: 42
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I tried that logic and it is not working.
 
Sagar Rohankar
Ranch Hand
Posts: 2908
1
Spring Java Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Which code/logic you tried ? Where was the problem ?
 
shan raj
Ranch Hand
Posts: 42
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The code is



Expected output is "Is Hex String= true". But it says false and throws an NumberFormatException
 
Sheriff
Posts: 22656
126
Eclipse IDE Spring VI Editor Chrome Java Windows
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
That's because the number is too large to fit into an int. Long.parseLong may work but can run into the same problem. BigInteger is also an option.

I'd follow the advise of the first reply there - use a Pattern to check. See java.util.regex.Pattern.
 
Sagar Rohankar
Ranch Hand
Posts: 2908
1
Spring Java Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
OR if you have an extensive use of Hex, decimal, binary, etc then try using
Apache Commons CodecHex class

 
Greenhorn
Posts: 12
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

shan raj wrote:The code is



Expected output is "Is Hex String= true". But it says false and throws an NumberFormatException



Hi shan

If you want to do it that way, you have to check each digit, not the whole string at once.

Stefan
 
Author
Posts: 12617
IntelliJ IDE Ruby
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Are there any cases where a string migt look like a hexadecimal number but be intended to be a string? (A place I worked at ran in to that. Think of things like "beef" or "cafe".)
 
Rob Spoor
Sheriff
Posts: 22656
126
Eclipse IDE Spring VI Editor Chrome Java Windows
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Or cafebabe of course
 
Attractive, successful people love this tiny ad:
Free, earth friendly heat - from the CodeRanch trailboss
https://www.kickstarter.com/projects/paulwheaton/free-heat
reply
    Bookmark Topic Watch Topic
  • New Topic