Re: iterator problem with List of Files

From:

Patricia Shanahan <pats@acm.org>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 22 Dec 2007 19:22:04 -0800

Message-ID:

<fkkk8t$107h$1@ihnp4.ucsd.edu>

Alan wrote:

     I am trying to iterate through a List<File>, but the compiler
does not like when I try to assign the next item to a File type. It
says that file and it.next() are incompatible types, but each item of
filelist is supposed to be of type File. The error occurs at the
line:

File file = it.next();

     The code may be found below. Note that the method listAllFiles
returns List<File>.

      What am I doing wrong? Thanks, Alan

List<File> filelist = listAllFiles(directory, "*.java");

for (Iterator it = filelist.iterator(); it.hasNext();)
{
    File file = it.next();
    System.out.println(file.getName());
}

More simply:

for (File file: filelist)
{
    System.out.println(file.getName());
}

but if you want to do it the old way, you could indicate what the
Iterator iterates:

for (Iterator<File> it = filelist.iterator(); it.hasNext();)
{
    File file = it.next();
    System.out.println(file.getName());
}

Patricia