Java File : getTotalSpace(), getFreeSpace() and getUsableSpace()
November 14, 2023
File class has some new methods.
getTotalSpace method gets total space in the specified directory by File instance.
getFreeSpace provides the available free space.
getUsableSpace provides the space available to virtual machine.
These methods returns long value
These methods are useful when we want to write some data on disk and need to know how much space are there to write data successfully. It is possible that just after getting disk space information from these methods, any other resource has written some data on disk. So these
File method are not giving guarantee to write data successfully.
Example
package com.concretepage;
import java.io.File;
public class FileTest {
public static void main(String... args){
File file= new File("c:");
//gets the total space in C drive in Byte
long totalSpace=file.getTotalSpace();
System.out.println("Total Space in Byte:"+totalSpace);
//gets the free space in C drive in Byte
long freeSpace=file.getFreeSpace();
System.out.println("Free Space in Byte:"+freeSpace);
//gets the usable space in c drive in Byte
long usableSpace=file.getUsableSpace();
System.out.println("Usable Space in Byte:"+usableSpace);
}
}
Total Space in Byte:63042482176 Free Space in Byte:6885539840 Usable Space in Byte:6885539840
