chapter19n3.java

JAVA源代码程序aashjkjhkjhkjhjkhkj

/**
 *
 * demonstration of output to a file
 *
 * Written by: Roger Garside
 *
 * First Written: 23/Jan/97
 * Last Rewritten: 23/Jan/97
 *
 */

import java.io.* ;

public class Chapter19n3
    {
    /**
     * 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 fileName = din.readLine().trim() ;
        PrintWriter pout = new PrintWriter(new FileWriter(fileName)) ;

	int noLines = 0 ;
	while (true)
	    {
	    System.err.print("next line? ") ;
	    System.err.flush() ;
            String line = din.readLine().trim() ;
	    if (line.length() == 0)
		break ;
            noLines++ ;
            pout.println(noLines + ":" + line) ;
	    }

        pout.close() ;
	System.err.println(noLines + " lines output to file '" +
						fileName + "'") ;
        } // end of main method
    } // end of class Chapter19n3