How do I create folders in Java?

File theDir = new File ("New Folder");

// If the directory does not exist, create the directory.
if (!theDir.exists()) {
    System.out.println("creating directory: " + directoryName);
    boolean result = false;

    try{
        theDir.mkdir();
        result = true;
    } 
    catch(SecurityException se){
        //handle it
    }        
    if(result) {    
        System.out.println("DIR created");  
    }
}