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POfile.exists() method returns false even if file exists
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  1. POfile.exists() method returns false even if file exists
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    copied!<p>I created a program to display all files and sub-directories present in a directory,the directory name being passed as an argument from command line in cmd.<br> The first <strong>if</strong> condition(<strong>if(f.isDirectory())</strong>) checking whether the given argument is directory or not works fine.<br> Then i use File.list() method that is <strong>dir_content = f.list()</strong> to store a list of all filenames in the directory in an array of String dir_content.<br> Then in for loop ,each time a new file object is created for each file name stored in the String array dir_content that is <strong>File f1 = new File(dir_content[i])</strong> and then check for existence of the file is made using exists() method that is <strong>if(f1.exists())</strong>.<br> Now problem is that <strong>f1.exists</strong> returns false for many of files despite of their existence in the given directory.It displays a few files, moreover doesn't show sub-directories.<br> Below is the code of my program:- </p> <pre><code>import java.io.File; class FileDemo1 { public static void main(String[] a) { File f = new File(a[0]); String[] dir_content; if(f.isDirectory()) { System.out.print(f.getName()+" is a directory containing "); dir_content = f.list(); for(int i=0;i&lt;dir_content.length;i++) { File f1 = new File(dir_content[i]); if(f1.exists()) { System.out.print("\n\t: "+f1.getName()); System.out.print(" "+f1.isFile()); System.out.print(" "+f1.isDirectory()); } } } } } </code></pre> <p>Someone please tell me the reason behind the problem and its solution.<br> Thanks in advance.</p>
 

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