CODEWITHSUNDEEP
javaregex
Sunil Kumar
Sunil Kumar

Reputation: 397

Java regex match not working

I am trying to match string using java regex, but my match is failing. What may be the issue in code below?

String line = "Copy of 001";

boolean b = Pattern.matches("001", line);

System.out.println("value is : "+b);

Output value is 

value is : false

Upvotes: 0

Views: 159

Answers (2)

JB Nizet
JB Nizet

Reputation: 691635

matches() tests if the whole string matches the regex. It doesn't. Use Matcher.find() instead. Or simply use String.contains(), as you don't need a regex to match a literal sequence of characters.

Upvotes: 1

Guillaume Polet
Guillaume Polet

Reputation: 47608

matches will match the whole string. Use a Matcher and the find() method instead:

boolean b = Pattern.compile("001").matcher(line).find();

Or make your pattern more flexible and allow it to have something prefixing the "001". For example:

".*001"

For something this simple, though, Pattern is an overkill and a simple indexOf will do the job much more efficiently:

boolean b = line.indexOf("001") > -1;

Upvotes: 1

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