Positive number match with regular expression in java

Posted on 2010-09-17
Last Modified: 2012-05-10
Hi There,

I am trying to match ONLY positive number of type Double with a regular expression in Java.

any clues?

Question by:theartha
  • 3
LVL 86

Accepted Solution

CEHJ earned 500 total points
ID: 33703194
Try matching the following:
	final String NO_NEG = "(?<!-)\\d*\\.\\d+";

Open in new window


Author Comment

ID: 33703260

How to compare that NO_NEG string with my input value.?

Pattern pattern = Pattern.compile(NO_NEG);
Matcher matcher1 = pattern.matcher(amount);  
matcher1.matches()== true{
//do something

Error: The method matcher(CharSequence) in the type Pattern is not applicable for the arguments
LVL 86

Expert Comment

ID: 33703314
boolean ok = amount.matches(NO_NEG);

Open in new window

LVL 86

Expert Comment

ID: 33703396

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

by Batuhan Cetin Regular expression is a language that we use to edit a string or retrieve sub-strings that meets specific rules from a text. A regular expression can be applied to a set of string variables. There are many RegEx engines for u…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

896 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now