Source Code in Java to Display all the files present in your system

//FileCrawl.java

This is the source code to display all the files in your system, from hard drives, disk drives, usb...

The explanation for this code can be found here Explanation


import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;


public class FileCrawl
{
static File fileList,tempFile[],fileRoots[];
static ArrayList files,dir;
static BufferedWriter bw;
static FileWriter fw;

public FileCrawl()throws Exception
{

fw=new FileWriter("D:\\output.txt",true);
fileRoots=File.listRoots();
}

public static void main(String[] args)
{
try
{
FileCrawl fileCrawl=new FileCrawl();
for(int i=0;i<fileRoots.length;i++)
{
fileCrawl.read(fileRoots[i].toString());
}

}
catch(Exception e)
{


}


}

public void read(String drive) throws Exception
{
files=new ArrayList();
dir=new ArrayList();
fileList=new File("C:\\");

dir.add(drive);

for(int i=0;i<dir.size();i++)
{
fileList=new File(dir.get(i).toString());



tempFile=fileList.listFiles();


if(tempFile!=null)
{
for(int j=0;j<tempFile.length;j++)
{
String temp=tempFile[j].toString();
if(tempFile[j].isDirectory()==true)
{
dir.add(temp);
}
else
{
files.add(temp);
}
}
}
else
{
continue;
}
}


System.out.println(files.size());
for(int i=0;i<files.size();i++)
{
fw.write(files.get(i).toString());
fw.write("\n");
}
}

}