/*
* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
*
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* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
import java.nio.file.*;
import java.nio.file.attribute.*;
import java.io.IOException;
/**
* Example utility that works like the df(1M) program to print out disk space
* information
*/
public class DiskUsage {
static final long K = 1024;
static void printFileStore(FileStore store) throws IOException {
long total = store.getTotalSpace() / K;
long used = (store.getTotalSpace() - store.getUnallocatedSpace()) / K;
long avail = store.getUsableSpace() / K;
String s = store.toString();
if (s.length() > 20) {
System.out.println(s);
s = "";
}
System.out.format("%-20s %12d %12d %12d\n", s, total, used, avail);
}
public static void main(String[] args) throws IOException {
System.out.format("%-20s %12s %12s %12s\n", "Filesystem", "kbytes", "used", "avail");
if (args.length == 0) {
FileSystem fs = FileSystems.getDefault();
for (FileStore store: fs.getFileStores()) {
printFileStore(store);
}
} else {
for (String file: args) {
FileStore store = Files.getFileStore(Paths.get(file));
printFileStore(store);
}
}
}
}