CODEWITHSUNDEEP
javaregexexpression
Jonathan
Jonathan

Reputation: 395

Java Reg Expression Excluding (Non word Character)

Hi I am new to reg expressions and I am trying to rename complicated file names like this one below:

3-M-COLORADOW-22017DB-LABEL

I want to rename this file name to this using java reg expressions:

3-M-COLORADOW-LABEL

However with my current beginning knowledge of Java Reg expressions I have only gotten this far:

enter image description here

I have tried many combinations with no success.I just need help finding the right combination of java reg expressions to achieve my goal. Basically i am trying to take one of the (dashes out). Any help would be appreciated.

    for(File file:filesInDir) {
        //x++;
        String name = file.getName();
        String newName = name;
        String sameName = name;
        if (name.contains("LABEL")){
           newName = sameName.replaceAll("(.*)-(.*)(-LABEL)", "$1$3") ; 
           System.out.println(newName); // prints prints to file 
           String newPath = absolutePathOne + "\\" + newName;
            file.renameTo(new File(newPath)); 
        }
    }

Upvotes: 0

Views: 83

Answers (2)

SilverNak
SilverNak

Reputation: 3381

Since you didn't give much information about the structure of your filenames, i'll assume you want to filter out numbers followed by letters. You could use the following regex:

(.*)-\d+\D+(-.*) // java-syntax: "(.*)-\\d+\\D+(-.*)"

with a Matcher. 

Pattern pattern = Pattern.compile("(.*)-\\d+\\D+(-.*)");
Matcher matcher = pattern.matcher(oldFilename);
if (matcher.matches) {
    String newFilename = m.group(1) + m.group(2);
}

Upvotes: 1

Youcef LAIDANI
Youcef LAIDANI

Reputation: 59978

You can use replaceAll with groups like this :

String str = "3-M-COLORADOW-22017DB-LABEL".replaceAll("(.*)-(.*)(-LABEL)", "$1$3");

Output

3-M-COLORADOW-LABEL

regex demo

Upvotes: 2

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