Question

I was wondering if there is any nice solution for the following problem:

Assuming I have a string with the absolute Path to a file and the file has the prefix “temp_”.
I am able to trim the prefix with string.replaceFirst().

But if I am unlucky “temp_” is also part of the directory in that String.
How to make sure only the last occurence will get trimmed?

I can only think to parse it myself, but was wondering if there’s magic left to do it a better way?

To be more precisely as example:

C:\Dump\sol1\temp_results\temp_2012-04-core.pcap

Should become:

C:\Dump\sol1\temp_results\2012-04-core.pcap

Answer 1

if you have got it is a File id defo use @goldilocks’ approach. But if for some reason you simply have it as a String, first thing that popped into my head is this:

    String target = "temp_";

    String fullPath = "C:/Dump/sol1/temp_results/temp_2012-04-core.pcap";

    StringBuffer sb = new StringBuffer(fullPath);
    int end = fullPath.lastIndexOf(target) + target.length();

    System.out.println(sb.replace(fullPath.lastIndexOf(target), end, ""));