java代码搜索整个系统的文件，在windows上工作正常但在linux ubuntu中无限

Question

Developing search utility to search a file entire computer system, works fine on windows platform but becomes an infinite process in ubuntu linux. Please help to overcome this flaw. The following is the main part of the code.

public static void fun(File f){  // root directory is passed as argument
try{
   if(f.isDirectory()){
       File [] fi=f.listFiles();
       for(int i=0;i<fi.length;i++){
           if(fileFound==true) break;   // fileFound is boolean data type used as flag to indicate whether the file is found or not
           System.out.println(fi[i].getName());
           fun(fi[i]);
       }
   }
   else{
       if(f.getName().equalsIgnoreCase(txtFile.getText()) || 
         (f.getName().toLowerCase().startsWith(txtFile.getText().toLowerCase())) ||     
         (f.getName().toLowerCase().endsWith(txtFile.getText().toLowerCase()))){    
           l.setText("file found " + f.getAbsolutePath()); // l is JLabel that indicated prints the info like file found and its path
           fileFound=true;
       }
   }
}
catch(Exception e){
}
}

Answer 1

The error you are observing may be due to nested symbolic links .

The most effective approach to solve this problem would be to instead use FileUtils#iterateFiles from the excellent Apache Commons IO library.

Answer 2

There is something like "." (current directory) and ".." (above directory) in each dir in linux. Maybe thats your problem.

Answer 3

In unix like systems the first folder is "." (current folder) and the second folder is ".." (the root folder)

you should skip the first 2 folders to avoid getting to the same folder over and over again.

try:

if(fi[i].getName() == "." || fi[i].getName() == "..")
    continue;