CODEWITHSUNDEEP
java
Aria
Aria

Reputation: 47

How to remove the appended String in java

So I have a file path which includes the filename along with extension and have appended System.currentmillis().Now If a condition is met I would like to remove the System.CurrentMillis from it .How can I do that?.The file path looks something like this

String filePath = someClass.getFile()+System.currentTimeMillis()+".txt";

Any help would be appreciated.Thanks in advance

Upvotes: 0

Views: 73

Answers (2)

priyanka
priyanka

Reputation: 325

The length of System.currentTimeMillis() now is 13 and it will take more than 200 years for its size to increase by 1. Hence I am trying to find the index of extension and using it to remove the timestamp from the file path.

    String fileName = "fileName1576647662124.txt";
    String extension = ".txt";
    int extensionIndex = fileName.indexOf(extension);
    System.out.println(fileName.substring(0, extensionIndex - 13) + extension);

Upvotes: 0

Tim Biegeleisen
Tim Biegeleisen

Reputation: 522516

We can't answer this in general without knowing what the file name is, in particular with which character that file name might end. If we assume that the file name would not end in a digit, we can try:

String filePath = "some_file1576645285164.txt";
System.out.println(filePath);
String output = filePath.replaceAll("\\d+(\\.[^.]+)$", "$1");
System.out.println(output);

This prints:

some_file1576645285164.txt
some_file.txt

Upvotes: 1

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