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}