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to read all the files in a directory and then its subdir. till end

Hi
  I have to build a utility which can verify my complete build for all files and directories
  I am making one text file in which i am storing the directories with there respective files.
but how can i handle all the files in a directory and then further it may have directory and so on. I am not getting what collection i should use to read all so that it will perform well.
I know it is recursive concept but how can be managed.
thanx
Regards
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econcepts
Asked:
econcepts
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1 Solution
 
objectsCommented:
public static void search(File dir)
{
   File[] files = dir.listFiles();
   for (int i=0; i<files.length; i++)
   {
      if (files[i].isDirectory())
      {
         search(files[i]);
      }
      else
      {
         // ...
      }
   }
}
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sudhakar_koundinyaCommented:
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sudhakar_koundinyaCommented:
// Process all files and directories under dir
    public static void visitAllDirsAndFiles(File dir) {
   
   
        if (dir.isDirectory()) {
            String[] children = dir.list();
            for (int i=0; i<children.length; i++) {
                visitAllDirsAndFiles(new File(dir, children[i]));
            }
        }
         else
          {
                    //this is a file
          }
    }
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Mayank SAssociate Director - Product EngineeringCommented:
See this - http://www.javaalmanac.com/egs/java.io/TraverseTree.html

The code that Sudhakar posted might be similar to that one..
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sciuriwareCommented:
If you would use a decent IDE (e.g. ECLIPSE) you would NEVER have to worry about this.
;JOOP!
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sudhakar_koundinyaCommented:
>> If you would use a decent IDE (e.g. ECLIPSE) you would NEVER have to worry about this.
???
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sciuriwareCommented:
ECLIPSE compiles automatically all relevant sources and even accounts for editing of sources outside
the IDE. If need be, you can even give the command "rebuild all that you know of".
;JOOP!
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sudhakar_koundinyaCommented:
Sorry sciuriware,
I didn't read the first part of the question thorougly. I  was doubting that how your answer is relevant to this question.

As you said A good IDE is always the right solution :-)


 
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Mayank SAssociate Director - Product EngineeringCommented:
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funnyveryfunnyCommented:
Since you are verifying files, it's better to use Breadth-First search approach. This will save time from deep mining if surface level is not completed - meaning faster responses.

code could be something like this:

verifyFiles(){
  File[] root = new File[1]; // One element array holding the root
  Vector fileList = new Vector();
  fileList.addElement(root);
  while(!fileList.isEmpty()){
     File[] files = fileList.firstElement();
     fileList.removeElement(0);
     for(i<files.length){
         if(exists(files[i])){ // Verification here, using a method called exists(files[i])
            if(files[i].isDirectory())
                fileList.addElement(files[i].listFiles());
         }
     }
  }
}


This is just the outline.

Bye.
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avya2kCommented:
Can this be helpful

     public static String Search(String toSrch, String inPath){
          String ret="";
          if(inPath.charAt(inPath.length()-1)!='\\' || inPath.charAt(inPath.length()-1)!='/')     inPath=inPath+"/";
          try{
               File f=new File(inPath);              
               File[] fl=f.listFiles();    
               //System.out.println(f.getAbsolutePath());          
               for(int i=0;i<fl.length;i++){    
                    //System.out.println(fl[i].getName());                                  
                    if(fl[i].isDirectory()){
                         if(fl[i].getName().toLowerCase().indexOf(toSrch.toLowerCase())!=-1)
                              ret=ret+fl[i].getAbsolutePath()+";";
                         ret=ret+Search(toSrch, fl[i].getAbsolutePath());
                    }
                    else{
                         if(fl[i].getName().toLowerCase().indexOf(toSrch.toLowerCase())!=-1)
                              ret=ret+fl[i].getAbsolutePath()+";";
                    }
               }
          }catch(Exception e){}
          return ret;
     }
     public static void main(String[] args) {
          String flist="";
          if(args.length==0)
               System.out.println("Usage: \nSearchFile <Filename to Search> [Path to Search in]");
          else{
               String pth=System.getProperty("user.dir");
               if(args.length>1)     pth=args[1];                              
               flist=Search(args[0],pth);
               System.out.println("Searching...");                        
          }              
          if(flist.length()>0){
               while(flist.indexOf(";")!=-1)
                    flist=flist.replace(';','\n');
               System.out.println("\n\n\nFiles Searched:\n"+flist);
          }          
     }
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