Java tutorial
/*license*\ XBN-Java: Copyright (C) 2014, Jeff Epstein (aliteralmind __DASH__ github __AT__ yahoo __DOT__ com) This software is dual-licensed under the: - Lesser General Public License (LGPL) version 3.0 or, at your option, any later version; - Apache Software License (ASL) version 2.0. Either license may be applied at your discretion. More information may be found at - http://en.wikipedia.org/wiki/Multi-licensing. The text of both licenses is available in the root directory of this project, under the names "LICENSE_lgpl-3.0.txt" and "LICENSE_asl-2.0.txt". The latest copies may be downloaded at: - LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt - ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt \*license*/ package com.github.xbn.examples.io.non_xbn; import java.util.Iterator; import java.io.File; import java.io.IOException; import org.apache.commons.io.FileUtils; import org.apache.commons.lang3.StringUtils; /** <p>Read in and then output a text file containing the data for a single in-progress sudoku puzzle.</p> <p>{@code java com.github.xbn.examples.io.non_xbn.SudokuTxtFileDataXmpl xbn\examples\io\non_xbn\SudokuTxtFileDataXmpline_itrnput.txt}</p> * @since 0.1.0 * @author Copyright (C) 2014, Jeff Epstein ({@code aliteralmind __DASH__ github __AT__ yahoo __DOT__ com}), dual-licensed under the LGPL (version 3.0 or later) or the ASL (version 2.0). See source code for details. <a href="http://xbnjava.aliteralmind.com">{@code http://xbnjava.aliteralmind.com}</a>, <a href="https://github.com/aliteralmind/xbnjava">{@code https://github.com/aliteralmind/xbnjava}</a> **/ public class SudokuTxtFileDataXmpl { public static final void main(String[] as_1RqdPathToInput) { //Read command-line String sSrc = null; try { sSrc = as_1RqdPathToInput[0]; } catch (IndexOutOfBoundsException ibx) { System.out.println("Missing one-and-only required parameter: The full path to Java source-code file."); return; } //Open input file File fSrc = new File(sSrc); Iterator<String> li = null; try { li = FileUtils.lineIterator(fSrc); } catch (IOException iox) { System.out.println("Cannot open \"" + sSrc + "\". " + iox); return; } String[] asNineElementsRow1 = getAndOutputDataRow(li.next()); String[] asNineElementsRow2 = getAndOutputDataRow(li.next()); String[] asNineElementsRow3 = getAndOutputDataRow(li.next()); li.next(); //blank line System.out.println("-----------------------"); String[] asNineElementsRow4 = getAndOutputDataRow(li.next()); String[] asNineElementsRow5 = getAndOutputDataRow(li.next()); String[] asNineElementsRow6 = getAndOutputDataRow(li.next()); li.next(); //blank line System.out.println("-----------------------"); String[] asNineElementsRow7 = getAndOutputDataRow(li.next()); String[] asNineElementsRow8 = getAndOutputDataRow(li.next()); String[] asNineElementsRow9 = getAndOutputDataRow(li.next()); } private static final String[] getAndOutputDataRow(String line) { String[] asNineElements = line.split(" "); for (int i = 0; i < asNineElements.length; i++) { if (asNineElements[i].equals(".")) { asNineElements[i] = " "; } } System.out.println(StringUtils.join(asNineElements, " ")); return asNineElements; } }