How to get file size in Java

Question

Possible Duplicate    Size of folder or file       I used this code to instantiate a File object   File f   new File path     How do I get the size of this file   What is the difference between getUsableSpace    getTotalSpace    and getFreeSpace

User · Answer

Try this   long length   f length

User · Answer

Use the length   method in the File class  From the javadocs   Returns the length of the file denoted by this abstract pathname  The return value is unspecified if this pathname denotes a directory   UPDATED Nowadays we should use the Files size   method  Paths path   Paths get  quot  path to file quot    long size   Files size path    For the second part of the question  straight from File s javadocs   getUsableSpace   Returns the number of bytes available to this virtual machine on the partition named by this abstract pathname  getTotalSpace   Returns the size of the partition named by this abstract pathname  getFreeSpace   Returns the number of unallocated bytes in the partition named by this abstract path name

User · Answer

Did a quick google   Seems that to find the file size you do this   long size   f length      The differences between the three methods you posted can be found here  getFreeSpace   and getTotalSpace   are pretty self explanatory  getUsableSpace   seems to be the space that the JVM can use  which in most cases will be the same as the amount of free space

[java] How to get file size in Java

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