URL replacement in java - java

I am trying to replace url with another url.
Below is the example of source url
http://sysserver01.internal.com/web/www/internal/projectwork/resources/injury-prevention-and-recovery/avoiding-injury/overview-of-running-injuries/
so this url should be replace with below url,
http://sysserver01.internal.com/var/www/html/injury-prevention-and-recovery/avoiding-injury/overview-of-running-injuries/
It means if source url comes then the part after resources in source url must be appended with /var/www/html/(and rest of part after resources in source url).
This needs to be happen with rendom set of source url that contains resources string.
I dont have enough knowldege of string manipulation. So please someone help me to solve this query. Please try to solve it in JAVA as I choose this platform for my work.


String originalUrl = "http://sysserver01.internal.com/web/www/internal/projectwork/resources/injury-prevention-and-recovery/avoiding-injury/overview-of-running-injuries";
String newUrl = originalUrl.replaceAll("web/www/internal/projectwork/resources", "var/www/html");


String originalUrl = "http://sysserver01.internal.com/web/www/internal/projectwork/resources/injury-prevention-and-recovery/avoiding-injury/overview-of-running-injuries";
String newUrl = originalUrl.replace("web/www/internal/projectwork/resources", "var/www/html");

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the code for the URL is
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String urlString = "http://www.cs.drexel.edu/~spiros/teaching/CS575/slides/java.pdf‎";
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I have also tried:
String urlString = "www.cs.drexel.edu/~spiros/teaching/CS575/slides/java.pdf‎";
i have tried printing urlString to the console, it is being set correctly to ether one accordingly in each test. What am i missing

This is wrong :
site = new URL("urlString");
Use the variable:
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That isn't a valid URL.
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