Currently, I have a script that loops over System.in for data processing. I am passing data to it from several files with cat.
cat myfiles*.txt | java MyDataProcessor
Based on the idea that cat adds some inefficiency vs. Java opening the files directly, I'd like to optimize this to where Java opens the files directly:
java MyDataProcessor myfiles*.txt
Are there any Java libraries that make this fairly easy (i.e. that handle the translation of posix wildcards into file handlers)?
Java 7 added a PathMatcher class that can be used to validate a path name based on a glob (which will be similar to the matching done by your shell)
PathMatcher matcher = FileSystems.getDefault().getPathMatcher("glob:myfiles*.txt");
matcher.matches(filename);
An example of walking a file tree and searching for files based on globs can be found in the Oracle Java tutorials here
