Java递归列出目录下全部文件

public class FileName {

public static void main(String[] args) {
String fileName="D:"+File.separator;
File f=new File(fileName);
print(f);
}
public static void print(File f){
if(f!=null){
if(f.isDirectory()){
File[] fileArray=f.listFiles();
if(fileArray!=null){
for (int i = 0; i < fileArray.length; i++) {
//递归调用
print(fileArray[i]);
}
}
}
else{
System.out.println(f);
}
}

}

}