How to find how much disk space is left using Java?

StackOverflow https://stackoverflow.com/questions/1051295

  •  20-08-2019
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Question

How to find how much disk space is left using Java?

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Solution

Just look at the File class documentation. This is one of the new features in 1.6.

These new methods also include:

  • public long getTotalSpace()
  • public long getFreeSpace()
  • public long getUsableSpace()

If you're still using 1.5 then you can use the Apache Commons IO library and its FileSystem class

OTHER TIPS

Java 1.7 has a slightly different API, free space can be queried through the FileStore class through the getTotalSpace(), getUnallocatedSpace() and getUsableSpace() methods.

NumberFormat nf = NumberFormat.getNumberInstance();
for (Path root : FileSystems.getDefault().getRootDirectories()) {

    System.out.print(root + ": ");
    try {
        FileStore store = Files.getFileStore(root);
        System.out.println("available=" + nf.format(store.getUsableSpace())
                            + ", total=" + nf.format(store.getTotalSpace()));
    } catch (IOException e) {
        System.out.println("error querying space: " + e.toString());
    }
}

The advantage of this API is that you get meaningful exceptions back when querying disk space fails.

Use CommonsIO and FilesystemUtils:

https://commons.apache.org/proper/commons-io/javadocs/api-2.5/org/apache/commons/io/FileSystemUtils.html#freeSpaceKb()

e.g. 

FileSystemUtils.freeSpaceKb("/");

or built into the JDK:

http://java.sun.com/javase/6/docs/api/java/io/File.html#getFreeSpace()

new File("/").getFreeSpace();

Link

If you are a Java programmer, you may already have been asked this simple, stupide question: “how to find the free disk space left on my system?”. The problem is that the answer is system dependent. Actually, it is the implementation that is system dependent. And until very recently, there was no unique solution to answer this question, although the need has been logged in Sun’s Bug Database since June 1997. Now it is possible to get the free disk space in Java 6 with a method in the class File, which returns the number of unallocated bytes in the partition named by the abstract path name. But you might be interested in the usable disk space (the one that is writable). It is even possible to get the total disk space of a partition with the method getTotalSpace().

in checking the diskspace using java you have the following method in java.io File class

  • getTotalSpace()
  • getFreeSpace()

which will definitely help you in getting the required information. For example you can refer to http://javatutorialhq.com/java/example-source-code/io/file/check-disk-space-java/ which gives a concrete example in using these methods.

public class MemoryStatus{  
 public static void main(String args[])throws Exception{  
  Runtime r=Runtime.getRuntime();  
  System.out.println("Total Memory: "+r.totalMemory());  
  System.out.println("Free Memory: "+r.freeMemory());    
 }
}

Try this code to get diskspace

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