Create directory in Java

// w  w  w . j a  va  2  s .  c  o  m
import java.io.File;

public class Main {
  public static void main(String[] args) {
    File dir = new File("C:/FileIO/DemoDirectory");

    boolean isDirectoryCreated = dir.mkdir();
    if (isDirectoryCreated) {
      System.out.println("successfully");
    } else {
      System.out.println("not");
    }
  }
}