001/* Console.java -- A character-based console device
002   Copyright (C) 2012  Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.io;
040
041/**
042 * @since 1.6
043 */
044public final class Console implements Flushable
045{
046  private static Console console = new Console();
047
048  public static Console console()
049  {
050    return console;
051  }
052
053  private Console()
054  {
055  }
056
057  public PrintWriter writer()
058  {
059    return new PrintWriter(new OutputStreamWriter(System.out));
060  }
061
062  public Reader reader()
063  {
064    return new InputStreamReader(System.in);
065  }
066
067  public Console format(String fmt, Object... args)
068  {
069    System.out.printf(fmt, args);
070
071    return this;
072  }
073
074  public Console printf(String fmt, Object... args)
075  {
076    return format(fmt, args);
077  }
078
079  public String readLine(String fmt, Object... args)
080  {
081    format(fmt, args);
082    return readLine();
083  }
084
085  public String readLine()
086  {
087    String result = null;
088    try
089      {
090        result = new BufferedReader(reader()).readLine();
091      }
092    catch (IOException e)
093      {
094        throw new IOError(e);
095      }
096    return result;
097  }
098
099  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}