import java.io.File;
public class DiskSpaceDetail {
 public static void main(String[] args) {
  File diskPartition = new File("C:");
  long totalCapacity = diskPartition.getTotalSpace();
  long freePartitionSpace = diskPartition.getFreeSpace();
  long usablePatitionSpace = diskPartition.getUsableSpace();
  System.out.println("**** Sizes in Mega Bytes ****\n");
  System.out.println("Total C partition size : " + totalCapacity / (1024*1024) + " MB");
  System.out.println("Usable Space : " + usablePatitionSpace / (1024 *1024) + " MB");
  System.out.println("Free Space : " + freePartitionSpace / (1024 *1024) + " MB");
  System.out.println("\n**** Sizes in Giga Bytes ****\n");
  System.out.println("Total C partition size : " + totalCapacity / (1024*1024*1024) + " GB");
  System.out.println("Usable Space : " + usablePatitionSpace / (1024 *1024*1024) + " GB");
  System.out.println("Free Space : " + freePartitionSpace / (1024 *1024*1024) + " GB");
 }
}

public class FreeDiskSpace {
 public static void main(String[] args) {
  File file = new File("c:");
  long totalSpace = file.getTotalSpace();
  long freeSpace = file.getFreeSpace();
  long usedSpace = totalSpace - freeSpace;
  System.out.println("总空间大小 : " + totalSpace / 1024 / 1024 / 1024 + "G");
  System.out.println("剩余空间大小 : " + freeSpace / 1024 / 1024 / 1024 + "G");
  System.out.println("已用空间大小 : " + usedSpace / 1024 / 1024 / 1024 + "G");
 }
}