1 /* 2 * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of Oracle nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 import java.nio.file.*; 33 import java.nio.file.attribute.*; 34 import java.io.IOException; 35 36 /** 37 * Example utility that works like the df(1M) program to print out disk space 38 * information 39 */ 40 41 public class DiskUsage { 42 43 static final long K = 1024; 44 45 static void printFileStore(FileStore store) throws IOException { 46 long total = store.getTotalSpace() / K; 47 long used = (store.getTotalSpace() - store.getUnallocatedSpace()) / K; 48 long avail = store.getUsableSpace() / K; 49 50 String s = store.toString(); 51 if (s.length() > 20) { 52 System.out.println(s); 53 s = ""; 54 } 55 System.out.format("%-20s %12d %12d %12d\n", s, total, used, avail); 56 } 57 58 public static void main(String[] args) throws IOException { 59 System.out.format("%-20s %12s %12s %12s\n", "Filesystem", "kbytes", "used", "avail"); 60 if (args.length == 0) { 61 FileSystem fs = FileSystems.getDefault(); 62 for (FileStore store: fs.getFileStores()) { 63 printFileStore(store); 64 } 65 } else { 66 for (String file: args) { 67 FileStore store = Files.getFileStore(Paths.get(file)); 68 printFileStore(store); 69 } 70 } 71 } 72 }