Disk Storage

To create a storage disk size from hardware in Java, you typically need to interact with system-level information. However, Java doesn't have direct built-in capabilities to access hardware disk information - you would need to use platform-specific commands or native libraries.

Here are a few approaches you could take:

1. **Using Java's File class** (for available space, not total hardware size):

```java

import java.io.File;

public class DiskSpace {

    public static void main(String[] args) {

        File disk = new File("/");

        long totalSpace = disk.getTotalSpace(); // total disk space in bytes

        long freeSpace = disk.getFreeSpace();   // free disk space in bytes

        long usableSpace = disk.getUsableSpace(); // space available to JVM

        

        System.out.println("Total space: " + totalSpace + " bytes");

        System.out.println("Free space: " + freeSpace + " bytes");

        System.out.println("Usable space: " + usableSpace + " bytes");

    }

}

```

2. **Using Runtime.exec() to call system commands** (platform dependent):

```java

import java.io.BufferedReader;

import java.io.InputStreamReader;

public class DiskInfo {

    public static void main(String[] args) {

        try {

            Process process;

            if (System.getProperty("os.name").toLowerCase().contains("win")) {

                process = Runtime.getRuntime().exec("wmic diskdrive get size");

            } else {

                process = Runtime.getRuntime().exec("df -h");

            }

            

            BufferedReader reader = new BufferedReader(

                new InputStreamReader(process.getInputStream()));

            

            String line;

            while ((line = reader.readLine()) != null) {

                System.out.println(line);

            }

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

```

3. **Using third-party libraries** like SIGAR:

```java

import org.hyperic.sigar.Sigar;

import org.hyperic.sigar.SigarException;

import org.hyperic.sigar.FileSystemUsage;

public class DiskInfoSigar {

    public static void main(String[] args) {

        Sigar sigar = new Sigar();

        try {

            FileSystemUsage usage = sigar.getFileSystemUsage("/");

            System.out.println("Total: " + usage.getTotal() + " KB");

            System.out.println("Free: " + usage.getFree() + " KB");

            System.out.println("Used: " + usage.getUsed() + " KB");

        } catch (SigarException e) {

            e.printStackTrace();

        }

    }

}

```

Important notes:

- Java has security restrictions that may limit access to hardware information

- The approaches above show disk space information, not creating a disk from hardware

- To actually create a disk partition or format a disk, you would need native OS-level access which Java doesn't provide directly

- On Android, you have additional restrictions and would need to use Android's storage APIs

Would you like me to focus on a specific aspect of this problem or explain any of these approaches in more detail?