CODEWITHSUNDEEP
javaregexstring
Gregg1989
Gregg1989

Reputation: 695

Using regular expressions to rename a string

In java, I want to rename a String so it always ends with ".mp4"

Suppose we have an encoded link, looking as follows:

String link = www.somehost.com/linkthatIneed.mp4?e=13974etc...

So, how do I rename the link String so it always ends with ".mp4"?

link = www.somehost.com/linkthatIneed.mp4  <--- that's what I need the final String to be.

Upvotes: 0

Views: 244

Answers (4)

Clad Clad
Clad Clad

Reputation: 2771

Another way to do this would be to split the string with ".mp4" as a split char and then add it again :)

Something like :

String splitChar = ".mp4";
String link = "www.somehost.com/linkthatIneed.mp4?e=13974etcrezkhjk"
String finalStr = link.split(splitChar)[0] + splitChar;

easy to do ^^

PS: I prefer to pass by regex but it ask for more knowledge about regex ^^

Upvotes: 1

Pramod S. Nikam
Pramod S. Nikam

Reputation: 4539

Try below code, 

  private String trimStringAfterOccurance(String link, String occuranceString) {

    Integer  occuranceIndex =  link.indexOf(occuranceString);

    String trimmedString = (String) link.subSequence(0, occuranceIndex + occuranceString.length() );    

    System.out.println(trimmedString);

    return trimmedString;
}

Upvotes: 0

Amit Joki
Amit Joki

Reputation: 59232

Well you can also do this:

Match the string with the below regex

\?.*

and replace it with empty string.

Demo: http://regex101.com/r/iV1cZ8

Upvotes: 0

sshashank124
sshashank124

Reputation: 32189

Just get the string until the .mp4 part using the following regex:

^(.*\.mp4)

and the first captured group is what you want.

Demo: http://regex101.com/r/zQ6tO5

Upvotes: 2

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