Example usage for java.io File createNewFile

Introduction

In this page you can find the example usage for java.io File createNewFile.

Prototype

public boolean createNewFile() throws IOException 

Source Link

Document

Atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist.

Usage

From source file:com.redhat.rhn.common.util.FileUtils.java

/**
 * Save a String to a file on disk using specified path.
 *
 * WARNING:  This deletes the original file before it writes.
 *
 * @param contents to save to file on disk
 * @param path to save file to.//from   ww  w. j a va  2s . c o  m
 */
public static void writeStringToFile(String contents, String path) {
    try {
        File file = new File(path);
        if (file.exists()) {
            file.delete();
        }
        file.createNewFile();
        Writer output = new BufferedWriter(new FileWriter(file));
        try {
            output.write(contents);
        } finally {
            output.close();
        }
    } catch (Exception e) {
        log.error("Error trying to write file to disk: [" + path + "]", e);
        throw new RuntimeException(e);
    }
}

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From source file:io.proleap.cobol.TestGenerator.java

public static void generateTreeFile(final File cobolInputFile, final File outputDirectory) throws IOException {
    final File outputFile = new File(outputDirectory + "/" + cobolInputFile.getName() + TREE_EXTENSION);

    final boolean createdNewFile = outputFile.createNewFile();

    if (createdNewFile) {
        LOG.info("Creating tree file {}.", outputFile);

        final File parentDirectory = cobolInputFile.getParentFile();
        final CobolSourceFormat format = getCobolSourceFormat(parentDirectory);

        final String preProcessedInput = CobolGrammarContext.getInstance().getCobolPreprocessor()
                .process(cobolInputFile, parentDirectory, format);

        final Cobol85Lexer lexer = new Cobol85Lexer(new ANTLRInputStream(preProcessedInput));
        final CommonTokenStream tokens = new CommonTokenStream(lexer);
        final Cobol85Parser parser = new Cobol85Parser(tokens);
        final StartRuleContext startRule = parser.startRule();
        final String inputFileTree = TreeUtils.toStringTree(startRule, parser);

        final PrintWriter pWriter = new PrintWriter(new FileWriter(outputFile));

        pWriter.write(inputFileTree);// w  w w. j av a  2  s.c  o m
        pWriter.flush();
        pWriter.close();
    }
}

---

From source file:com.unicornlabs.kabouter.reporting.PowerReport.java

public static void GeneratePowerReport(Date startDate, Date endDate) {
    try {/*from   w  w w . j  a va  2  s.  c  o  m*/
        Historian theHistorian = (Historian) BusinessObjectManager.getBusinessObject(Historian.class.getName());
        ArrayList<String> powerLogDeviceIds = theHistorian.getPowerLogDeviceIds();

        Document document = new Document(PageSize.A4, 50, 50, 50, 50);

        File outputFile = new File("PowerReport.pdf");
        outputFile.createNewFile();

        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(outputFile));
        document.open();

        document.add(new Paragraph("Power Report for " + startDate.toString() + " to " + endDate.toString()));

        document.newPage();

        DecimalFormat df = new DecimalFormat("#.###");

        for (String deviceId : powerLogDeviceIds) {
            ArrayList<Powerlog> powerlogs = theHistorian.getPowerlogs(deviceId, startDate, endDate);
            double total = 0;
            double max = 0;
            Date maxTime = startDate;
            double average = 0;
            XYSeries series = new XYSeries(deviceId);
            XYDataset dataset = new XYSeriesCollection(series);

            for (Powerlog log : powerlogs) {
                total += log.getPower();
                if (log.getPower() > max) {
                    max = log.getPower();
                    maxTime = log.getId().getLogtime();
                }
                series.add(log.getId().getLogtime().getTime(), log.getPower());
            }

            average = total / powerlogs.size();

            document.add(new Paragraph("\nDevice: " + deviceId));
            document.add(new Paragraph("Average Power Usage: " + df.format(average)));
            document.add(new Paragraph("Maximum Power Usage: " + df.format(max) + " at " + maxTime.toString()));
            document.add(new Paragraph("Total Power Usage: " + df.format(total)));
            //Create a custom date axis to display dates on the X axis
            DateAxis dateAxis = new DateAxis("Date");
            //Make the labels vertical
            dateAxis.setVerticalTickLabels(true);

            //Create the power axis
            NumberAxis powerAxis = new NumberAxis("Power");

            //Set both axes to auto range for their values
            powerAxis.setAutoRange(true);
            dateAxis.setAutoRange(true);

            //Create the tooltip generator
            StandardXYToolTipGenerator ttg = new StandardXYToolTipGenerator("{0}: {2}",
                    new SimpleDateFormat("yyyy/MM/dd HH:mm"), NumberFormat.getInstance());

            //Set the renderer
            StandardXYItemRenderer renderer = new StandardXYItemRenderer(StandardXYItemRenderer.LINES, ttg,
                    null);

            //Create the plot
            XYPlot plot = new XYPlot(dataset, dateAxis, powerAxis, renderer);

            //Create the chart
            JFreeChart myChart = new JFreeChart(deviceId, JFreeChart.DEFAULT_TITLE_FONT, plot, true);

            PdfContentByte pcb = writer.getDirectContent();
            PdfTemplate tp = pcb.createTemplate(480, 360);
            Graphics2D g2d = tp.createGraphics(480, 360, new DefaultFontMapper());
            Rectangle2D r2d = new Rectangle2D.Double(0, 0, 480, 360);
            myChart.draw(g2d, r2d);
            g2d.dispose();
            pcb.addTemplate(tp, 0, 0);

            document.newPage();
        }

        document.close();

        JOptionPane.showMessageDialog(null, "Report Generated.");

        Desktop.getDesktop().open(outputFile);
    } catch (FileNotFoundException fnfe) {
        JOptionPane.showMessageDialog(null,
                "Unable To Open File For Writing, Make Sure It Is Not Currently Open");
    } catch (IOException ex) {
        Logger.getLogger(PowerReport.class.getName()).log(Level.SEVERE, null, ex);
    } catch (DocumentException ex) {
        Logger.getLogger(PowerReport.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:Main.java

public static File createFile(String path) throws IOException {
    if (notEmptyOrNull(path)) {
        File file = new File(path);
        if (!file.exists()) {
            int lastIndex = path.lastIndexOf(File.separator);
            String dir = path.substring(0, lastIndex);
            if (createFolder(dir) != null) {
                file.createNewFile();
                return file;
            }//from w w  w. j  av  a  2s.c  om
        } else {
            file.createNewFile();
            return file;
        }
    }
    return null;
}

---

From source file:bammerbom.ultimatecore.spongeapi.resources.classes.ErrorLogger.java

public static void log(Throwable t, String s) {
    String time = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss-SSS").format(Calendar.getInstance().getTime());
    File dir = new File(r.getUC().getDataFolder() + "/Errors");
    if (!dir.exists()) {
        dir.mkdir();//from  w w  w  . jav  a2  s .  c om
    }
    File file = new File(r.getUC().getDataFolder() + "/Errors", time + ".txt");
    if (!file.exists()) {
        try {
            file.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    FileWriter outFile;
    try {
        outFile = new FileWriter(file);
    } catch (IOException e) {
        e.printStackTrace();
        return;
    }
    PrintWriter out = new PrintWriter(outFile);
    out.println("=======================================");
    out.println("UltimateCore has run into an error ");
    out.println("Please report your error on dev.bukkit.org/bukkit-plugins/ultimate_core/create-ticket");
    out.println("Spongeapi version: " + r.getGame().getMinecraftVersion() + " - "
            + r.getGame().getImplementationVersion());
    out.println("UltimateCore version: "
            + r.getGame().getPluginManager().getPlugin("UltimateCore").get().getVersion());
    out.println("Plugins loaded (" + r.getGame().getPluginManager().getPlugins().size() + "): "
            + Arrays.asList(r.getGame().getPluginManager().getPlugins()));
    out.println("Java version: " + System.getProperty("java.version"));
    out.println("OS info: " + System.getProperty("os.arch") + ", " + System.getProperty("os.name") + ", "
            + System.getProperty("os.version"));
    if (r.getGame().getServer().isPresent()) {
        out.println("Online mode: " + r.getGame().getServer().get().getOnlineMode());
    }
    out.println("Time: " + time);
    out.println("Error message: " + t.getMessage());
    out.println("UltimateCore message: " + s);
    out.println("=======================================");
    out.println("Stacktrace: \n" + ExceptionUtils.getStackTrace(t));
    out.println("=======================================");
    out.close();
    try {
        outFile.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    //
    r.log(" ");
    r.log(TextColors.DARK_RED + "=========================================================");
    r.log(TextColors.RED + "UltimateCore has run into an error ");
    r.log(TextColors.RED + "Please report your error on ");
    r.log(TextColors.YELLOW + "http://dev.bukkit.org/bukkit-plugins/ultimate_core/create-ticket");
    r.log(TextColors.RED + "Include the file: ");
    r.log(TextColors.YELLOW + "plugins/UltimateCore/Errors/" + time + ".txt ");
    /*r.log(TextColors.RED + "Sponge version: " + Bukkit.getServer().getVersion());
     r.log(TextColors.RED + "UltimateCore version: " + Bukkit.getPluginManager().getPlugin("UltimateCore").getDescription().getVersion());
     r.log(TextColors.RED + "Plugins loaded (" + Bukkit.getPluginManager().getPlugins().length + "): " + Arrays.asList(Bukkit.getPluginManager().getPlugins()));
     r.log(TextColors.RED + "Java version: " + System.getProperty("java.version"));
     r.log(TextColors.RED + "OS info: " + System.getProperty("os.arch") + ", " + System.getProperty("os.name") + ", " + System.getProperty("os.version"));
     r.log(TextColors.RED + "Error message: " + t.getMessage());
     r.log(TextColors.RED + "UltimateCore message: " + s);*/
    r.log(TextColors.DARK_RED + "=========================================================");
    if (t instanceof Exception) {
        r.log(TextColors.RED + "Stacktrace: ");
        t.printStackTrace();
        r.log(TextColors.DARK_RED + "=========================================================");
    }
    r.log(" ");
}

---

From source file:io.proleap.vb6.TestGenerator.java

public static void generateTestClass(final File vb6InputFile, final File outputDirectory,
        final String packageName) throws IOException {
    final String inputFilename = getInputFilename(vb6InputFile);
    final File outputFile = new File(
            outputDirectory + "/" + inputFilename + OUTPUT_FILE_SUFFIX + JAVA_EXTENSION);

    final boolean createdNewFile = outputFile.createNewFile();

    if (createdNewFile) {
        LOG.info("Creating unit test {}.", outputFile);

        final PrintWriter pWriter = new PrintWriter(new FileWriter(outputFile));
        final String vb6InputFileName = vb6InputFile.getPath().replace("\\", "/");

        pWriter.write("package " + packageName + ";\n");
        pWriter.write("\n");
        pWriter.write("import java.io.File;\n");
        pWriter.write("\n");
        pWriter.write("import org.junit.Test;\n");
        pWriter.write("import io.proleap.vb6.runner.VbParseTestRunner;\n");
        pWriter.write("import io.proleap.vb6.runner.impl.VbParseTestRunnerImpl;\n");
        pWriter.write("\n");
        pWriter.write("public class " + inputFilename + "Test {\n");
        pWriter.write("\n");
        pWriter.write("   @Test\n");
        pWriter.write("   public void test() throws Exception {\n");
        pWriter.write("      final File inputFile = new File(\"" + vb6InputFileName + "\");\n");
        pWriter.write("      final VbParseTestRunner runner = new VbParseTestRunnerImpl();\n");
        pWriter.write("      runner.parseFile(inputFile);\n");
        pWriter.write("   }\n");
        pWriter.write("}");

        pWriter.flush();/*from  w w  w .ja  v  a  2 s. c  om*/
        pWriter.close();
    }
}

---

From source file:com.zimbra.common.util.CliUtil.java

/**
 * Turns on command line editing with JLine.  
 * @param histFilePath path to the history file, or {@code null} to not save history
 * @throws IOException if the history file is not writable or cannot be created
 *//*from www  .  ja  va2 s  . c  o  m*/
public static void enableCommandLineEditing(String histFilePath) throws IOException {
    File histFile = null;
    if (histFilePath != null) {
        histFile = new File(histFilePath);
        if (!histFile.exists()) {
            if (!histFile.createNewFile()) {
                throw new IOException("Unable to create history file " + histFilePath);
            }
        }
        if (!histFile.canWrite()) {
            throw new IOException(histFilePath + " is not writable");
        }
    }
    ConsoleReader reader = new ConsoleReader();
    if (histFile != null) {
        reader.setHistory(new History(histFile));
    }
    ConsoleReaderInputStream.setIn(reader);
}

---

From source file:com.abiquo.appliancemanager.ApplianceManagerAsserts.java

/**
 * /*from   w ww . j  a v  a  2  s . c om*/
 * 
 * */

protected static void createBundleDiskFile(final String ovfId, final String snapshot) throws Exception {
    EnterpriseRepositoryService er = ErepoFactory.getRepo(String.valueOf(idEnterprise));

    final String ovfpath = TemplateConventions.getRelativePackagePath(ovfId);
    final String diskFilePathRel = er.getDiskFilePath(ovfId);
    // final String diskFilePathRel = diskFilePath.substring(diskFilePath.lastIndexOf('/'));

    final String path = FilenameUtils.concat(FilenameUtils.concat(er.path(), ovfpath),
            (snapshot + "-snapshot-" + diskFilePathRel));

    // "/opt/testvmrepo/1/rs.bcn.abiquo.com/m0n0wall/000snap000-snapshot-m0n0wall-1.3b18-i386-flat.vmdk"

    File f = new File(path);
    f.createNewFile();
    f.deleteOnExit();

    FileWriter fileWriter = new FileWriter(f);
    for (int i = 0; i < 1000; i++) {
        fileWriter.write(i % 1);
    }
    fileWriter.close();
}

---

From source file:io.treefarm.plugins.haxe.utils.HaxelibHelper.java

public static File getHaxelibDirectoryForArtifactAndInitialize(String artifactId, String version,
        Logger logger) {// w  w  w  .ja v a2  s  . c o m
    File haxelibDirectory = getHaxelibDirectoryForArtifact(artifactId, version);
    if (haxelibDirectory != null) {
        File currentFile = new File(haxelibDirectory.getParentFile(), ".current");
        if (!currentFile.exists()) {
            try {
                currentFile.createNewFile();
            } catch (IOException e) {
                logger.error("Unable to create pointer for '" + artifactId + "' haxelib: " + e);
                // todo: throw exception!!
            }
        }
    }
    return haxelibDirectory;
}

---

From source file:Main.java

public static void writeInteractionInFile(Context context, String startTime, String endTime, long duration,
        String filename) throws IOException, Exception {

    BufferedWriter writer = null;
    //String path="sdcard/LifeTracker/lifetracker.csv";
    File dir = new File("sdcard/SleepLog");
    boolean flag = dir.mkdir();
    //Log.d("Directory created?",""+flag);
    File file = new File(dir.getAbsolutePath(), filename);
    if (file.exists() == false) {
        //                  Intent service = new Intent(context,DataBaseService.class);
        //                  context.startService(service);
        file.createNewFile();
        writer = new BufferedWriter(new FileWriter(file, true));
        writer.write("Start Time,End Time,Duration");
        writer.newLine();//from ww w  .ja  va  2s  .c  om
        writer.write(startTime + "," + endTime + "," + duration);
    } else {
        writer = new BufferedWriter(new FileWriter(file, true));
        writer.newLine();
        writer.write(startTime + "," + endTime + "," + duration);
    }
    Log.d("Appended", "True");
    writer.flush();
    writer.close();

}

---

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