Regex for a pattern [closed] - java

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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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last two occurance of semicolon(;) in given String using Java [closed]

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How do I get the after last two semicolon's occurrences of a string ?
Example:
Mobiles;Students;Test;Yes;1234
The output should be
Yes;1234

Using a regex replacement, we can try:
String input = "Mobiles;Students;Test;Yes;1234";
String output = input.replaceAll("^.*;([^;]+;[^;]+)$", "$1");
System.out.println(output); // Yes;1234

How to exclude a only substring(not their characters) from the string using java regex? [closed]

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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.

Mask String before occurrence of first whitespace [closed]

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I want to mask the string before the first white space
Eg. "123 test1" mask to xxtest1
"12/6786 test2" mask to xxtest2
Using string replace all with regex

I tried this ^.*?[^\s]*\s and it seems to be working to your case.

Java - Regex only 0 or 5 [closed]

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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]$"

Regular expression, to get text after blank space [closed]

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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

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