Source for java.io.Console

   1: /* Console.java -- A character-based console device
   2:    Copyright (C) 2012  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package java.io;
  40: 
  41: /**
  42:  * @since 1.6
  43:  */
  44: public final class Console implements Flushable
  45: {
  46:   private static Console console = new Console();
  47: 
  48:   public static Console console()
  49:   {
  50:     return console;
  51:   }
  52: 
  53:   private Console()
  54:   {
  55:   }
  56: 
  57:   public PrintWriter writer()
  58:   {
  59:     return new PrintWriter(new OutputStreamWriter(System.out));
  60:   }
  61: 
  62:   public Reader reader()
  63:   {
  64:     return new InputStreamReader(System.in);
  65:   }
  66: 
  67:   public Console format(String fmt, Object... args)
  68:   {
  69:     System.out.printf(fmt, args);
  70: 
  71:     return this;
  72:   }
  73: 
  74:   public Console printf(String fmt, Object... args)
  75:   {
  76:     return format(fmt, args);
  77:   }
  78: 
  79:   public String readLine(String fmt, Object... args)
  80:   {
  81:     format(fmt, args);
  82:     return readLine();
  83:   }
  84: 
  85:   public String readLine()
  86:   {
  87:     String result = null;
  88:     try
  89:       {
  90:         result = new BufferedReader(reader()).readLine();
  91:       }
  92:     catch (IOException e)
  93:       {
  94:         throw new IOError(e);
  95:       }
  96:     return result;
  97:   }
  98: 
  99:   public char[] readPassword(String fmt, Object... args)
 100:   {
 101:     format(fmt, args);
 102:     return readPassword();
 103:   }
 104: 
 105:   public char[] readPassword()
 106:   {
 107:     String s = VMConsole.readPassword(this);
 108: 
 109:     System.out.println();
 110: 
 111:     if (s == null)
 112:       {
 113:         return null;
 114:       }
 115:     return s.toCharArray();
 116:   }
 117: 
 118:   public void flush() throws IOException
 119:   {
 120:     System.out.flush();
 121:   }
 122: }