CODEWITHSUNDEEP
javaregex
user2309944
user2309944

Reputation:

regular expression pattern doesn't match

I have some html codes saved in a file. I want to replace all texts that match this pattern: @@[\w]{1,}@@. but why this pattern in my java code doesn't work? is my pattern wrong?

String line = "\t<title>@@title@@</title>";

if(line.matches("@@title@@")) {
    line = line.replaceAll("@@title@@", "Title");
}

Upvotes: 0

Views: 90

Answers (2)

m0skit0
m0skit0

Reputation: 25874

In Java, String#matches only returns true if the whole string matches the regex. In your case you want this regex: .*@@title@@.*.

I think String#contains is better for your case since you are not really want to match a regex but a substring.

Upvotes: 0

johnchen902
johnchen902

Reputation: 9609

line.matches("@@title@@")

means the whole line matches. Imagine it like this

line.matches("^@@title@@$")

And replaceAll won't throw exception if there is no match, so you can simply drop your check:

String line = "\t<title>@@title@@</title>";
line = line.replaceAll("@@title@@", "Title");

Upvotes: 2

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