Root list with File.listRoots() : Special Directories « Development « Java Tutorial

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2. Development
3. Special Directories

import java.io.File;

public class MainClass {

  public static void main(String[] args) {

    File[] roots = File.listRoots();
    for (int i = 0; i < roots.length; i++) {
      System.out.println(roots[i]);
    }
  }
}