chapter19n4a.java

JAVA源代码程序aashjkjhkjhkjhjkhkj

/**
 *
 * demonstration of file handling - non-AWT version of Chapter19n4.java
 *
 * Written by: Roger Garside
 *
 * First Written: 23/Jan/97
 * Last Rewritten: 23/Jan/97
 *
 */

import java.io.* ;

public class Chapter19n4a
    {
    /**
     * main
     */

    public static void main(String[] args) throws IOException
        {
        BufferedReader din =
			new BufferedReader(new InputStreamReader(System.in)) ;

        System.err.print("type a file name: ") ;
	System.err.flush() ;
        String name = din.readLine().trim() ;
        String directory = "." ;
        try {
            File s = new File(directory, name) ;
	    if (s.isDirectory())
	        {
	        String[] list = s.list() ;
	        for (int i = 0 ; i < list.length ; i++)
                    System.out.println(list[i]) ;
	        }
	    else
	        {
	        FileReader s0 = new FileReader(s) ;
	        BufferedReader s1 = new BufferedReader(s0) ;

	        while (true)
	            {
	            String line = s1.readLine() ;
	            if (line == null)
	    	        break ;
                    System.out.println(line) ;
	            }
	        s1.close() ;
	        }
	    }
        catch(IOException e)
	    {
	    System.err.println("ERROR: " + e) ;
	    }
        } // end of main method
    } // end of class Chapter19n4a