//
// example program using methods of File class
//

import java.io.File ;

public class TestFile {

        // takes one command-line argument, pathname 
        // builds a File object for that pathname and shows what
        //      happens when we invoke some of the methods of the
        //      File class
        // note that the pathname can be a relative path or an
        //      absolute path, a file or a directory, and need not
        //      actually exist 

        public static void main(String[] args) {

                if (args.length == 0) {
                        System.out.println("Argument required") ;
                        System.exit(-1) ;
                }

                File f = new File(args[0]) ;

                System.out.println(args[0] + " exists?  " + 
                        f.exists()) ;
                System.out.println(args[0] + " can be read?  " +
                        f.canRead() ) ;
                System.out.println(args[0] + " can be written?  " +
                        f.canRead() ) ;
                System.out.println(args[0] + " is a file?  " +
                        f.isFile() ) ;
                System.out.println(args[0] + " is a directory?  " +
                        f.isDirectory() ) ;

                System.out.println("Absolute pathname for " +
                        args[0] + " is " + f.getAbsolutePath()) ;
                System.out.println("Name for " +
                        args[0] + " is " + f.getName()) ;
                System.out.println("Parent for " +
                        args[0] + " is " + f.getParent()) ;
                System.out.println("Length of " +
                        args[0] + " is " + f.length()) ;

                if (f.isDirectory()) {
                        String[] fileList = f.list() ;
                        System.out.println("Contents of directory " +
                                args[0] + ":") ;
                        for (int i = 0 ; i < fileList.length ; i++) 
                                System.out.println("\t" + fileList[i]) ;
                }
        }
}