public static void main(String[] args) {
Scanner console = new Scanner(System.in);
System.out.print("directory or file name? ");
String name = console.nextLine();
File f = new File(name);
if (!f.exists()) {
System.out.println("That file or directory does not exist");
} else {
print(f);
}
}
// Prints the name of the given file. If the file is a directory,
// recursively prints its content. Displays the name of each file
// at the specified indentation level.
// pre: f != null and f.exists()
private static void print(File f, int indent) {
for (int i = 0; i < indent; i++) {
System.out.print(" ");
}
System.out.println(f.getName());
if (f.isDirectory()) {
File[] files = f.listFiles();
for (int i = 0; i < files.length; i++) {
print(files[i], indent + 1);
}
}
}
// Prints the name of the given file. If the file is a directory,
// recursively prints its content. The given file is printed at
// 0 intendation.
// pre: f != null and f.exists()
public static void print(File f) {
print(f, 0);
}