Traversing files and
directories
This section you will learn how the files
and subdirectories are traversed lying under a directory. We can find that, how many files and directories are
available within a directory.
This is very frequently used where lot of work depends on the files and
directories. .
The given program describes how you can traverse a directory
if it contains directory and files under it. If the directory contains no files
and directory then it will tell you that the directory contains no directory and
files in it, if it contains a directory and files in it then it will display all
the files and directories.
To implement this program, first make a class named as
TraversingFileAndDirectories then make an object of File class and pass any
directory and filename to its constructor. After that, check it whether the
file or directory you have entered is a directory or a file. If it is a
directory then it will display that it is a directory otherwise not a directory. If
it is a directory, it checks whether it contains more directory and files in it.
If it contains then it will display you the list of the files and directories.
Code of the program is given below
import java.io.*;
public class TraversingFileAndDirectories{
public static void main(String args[]){
String dirname = args[0];
File file = new File(dirname);
if(file.isDirectory()){
System.out.println("Directory is " + dirname);
String str[] = file.list();
for( int i = 0; i<str.length; i++){
File f=new File(dirname + " / " + str[i]);
if(f.isDirectory()){
System.out.println(str[i] + " is a directory");
}
else{
System.out.println(str[i] + " is a file");
}
}
}
else{
System.out.println(dirname + " is not a directory");
}
}
}
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Output of the program
C:\java>java TraversingFileAndDirectories chandan
Directory is chandan
ConstructingFileNamePath.java is a file
constructingfilenamepath.shtml is a file
EnterValuesFromKeyboard.java is a file
entervaluesfromkeyboard.shtml is a file
Factorial.java is a file
factorial.shtml is a file
UseOfThisOperator.java is a file
useofthisoperator.shtml is a file |
Download
this program
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