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Regular expression only accepts 0 or 5.
Is there a regex expression to evaluate that?
Thanks.
You can use either "0|5" or "[05]". The first is an alternative, the second is a character class. They will behave identically. See the documentation for Pattern for more information on the building blocks for regular expressions.
Read this. And use this:
"^[05]$"
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When I use [^abc] it excludes a,b,c but I want to exclude only abc not a,b,c.
Just in principle? There are several ways to do it, depending on your context. You could use a negative lookahead, for example, which will assert what the following string must not look like.
Example text:
aba abc abx
Expression:
\b(?!abc)\w{3}\b
Matches:
aba, abx
You should update your question with context if you want specific help.
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As per Java's standard we should follow CamelCase. But why String's method substring() is not in camelCase ? Is it for any specific reason or just an mistake from the initial days ?
I'd say because substring is one physical word.
camelCase is used to separate words, substring is not to be intended as Sub String but as Substring... so the convention is respected.
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I want to write a regex for this below pattern.
of John at /roger/adam/sam
here John is a value(can be alphanumeric) and /roger/adam/sam is an XPath with can change.
I want to replace all such instances with
of $value at $XPath
You can use the following to match
(of\s*)[a-zA-Z\d:-]+(\s*at\s*).*?(?=\s)
and replace with $1$value$2$XPath
See DEMO
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I am currently writing a game in Java, where words in a string will have to be all changed to equal 5 characters a word.
eg. I am writing in Java
Iamwr iting inJav a
I wonder if anyone knows how I would do this?
First remove spaces between words.
Then split that resulting String to length with 5.
Add a space after every 5 character.
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I have this text:
1 A Maths
And i would like to get only Maths.
I don´t know about regular expressions.
Can any one help me, please?
Thanks
Why don't you split the string ?
String chain="A Maths";
String[] array=chain.split(" ");
String number=array[0];
String course=array[1];
...
How to split a string in Java