printfのようなもの

import java.io.*;
import java.util.*;

/**
* $Id: printf.html,v 1.1 2009/06/22 16:12:20 kishi Exp kishi $
* @author KISHI Yasuhiro
*/

public class PrintfTest {

    static public void main( String[] args ) {

        try {
            String result = sprintf( "%04d", 105 );

            System.out.println( result );

        } catch ( Exception e ) {
            e.printStackTrace();
        }

        for ( double d = 0;d < 100.0;d += 3.85 ) {
            System.out.printf( "%8.2f\n", d );
        }

    }

    static String sprintf( String format, Object obj ) throws Exception {

        String value = null;
        try {

            // C言語のsprinfもどき
            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            PrintWriter pw = new PrintWriter( baos );
            pw.printf( format, obj );
            pw.flush();
            pw.close();

            value = baos.toString( "UTF8" );

            baos.close();


        } catch ( Exception e ) {
            throw e;
        } finally {

            return value;
        }
    }
}

■実行結果

0105
    0.00
    3.85
    7.70
   11.55
   15.40
   19.25
   23.10
   26.95
   30.80
   34.65
   38.50
   42.35
   46.20
   50.05
   53.90
   57.75
   61.60
   65.45
   69.30
   73.15
   77.00
   80.85
   84.70
   88.55
   92.40
   96.25