File size distribution: Difference between revisions
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=={{header|J}}==
</syntaxhighlight>
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public final class FileSizeDistribution {
public static void main(String[] aArgs) throws IOException {
List<Path> fileNames = Files.list(Path.of("."))
.filter( file -> ! Files.isDirectory(file) )
.map(Path::getFileName)
.toList();
Map<Integer, Integer> fileSizes = new HashMap<Integer, Integer>();
for ( Path path : fileNames ) {
fileSizes.merge(String.valueOf(Files.size(path)).length(), 1, Integer::sum);
}
final int fileCount = fileSizes.values().stream().mapToInt(Integer::valueOf).sum();
System.out.println("File size distribution for directory \".\":" + System.lineSeparator());
System.out.println("File size in bytes | Number of files | Percentage");
System.out.println("-------------------------------------------------");
for ( int key : fileSizes.keySet() ) {
final int value = fileSizes.get(key);
System.out.println(String.format("%s%d%s%d%15d%15.1f%%",
" 10^", ( key - 1 ), " to 10^", key, value, ( 100.0 * value ) / fileCount));
}
}
}
</syntaxhighlight>
{{ out }}
<pre>
File size distribution for directory ".":
File size in bytes | Number of files | Percentage
-------------------------------------------------
10^0 to 10^1 1 0.2%
10^1 to 10^2 1 0.2%
10^2 to 10^3 5 1.1%
10^3 to 10^4 3 0.6%
10^4 to 10^5 161 34.0%
10^5 to 10^6 196 41.4%
10^6 to 10^7 98 20.7%
10^7 to 10^8 9 1.9%
</pre>
=={{header|Julia}}==
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