Example usage for java.io FileInputStream close

Introduction

In this page you can find the example usage for java.io FileInputStream close.

Prototype

public void close() throws IOException

Source Link

Document

Closes this file input stream and releases any system resources associated with the stream.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {

    FileInputStream fin = null;
    FileOutputStream fout = null;

    File file = new File("C:/myfile1.txt");

    fin = new FileInputStream(file);
    fout = new FileOutputStream("C:/myfile2.txt");

    byte[] buffer = new byte[1024];
    int bytesRead;
    while ((bytesRead = fin.read(buffer)) > 0) {
        fout.write(buffer, 0, bytesRead);
    }/*from   ww  w  . j  a  va2 s. c om*/
    fin.close();
    fout.close();
}

From source file:CopyBytes.java

public static void main(String[] args) throws IOException {
    FileInputStream in = null;
    FileOutputStream out = null;//from ww  w.j a  va 2 s. c om
    try {
        in = new FileInputStream("xanadu.txt");
        out = new FileOutputStream("outagain.txt");
        int c;

        while ((c = in.read()) != -1) {
            out.write(c);
        }

    } finally {
        if (in != null) {
            in.close();
        }
        if (out != null) {
            out.close();
        }
    }
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    SecretKey key = KeyGenerator.getInstance("DES").generateKey();

    // for CBC; must be 8 bytes
    byte[] initVector = new byte[] { 0x10, 0x10, 0x01, 0x04, 0x01, 0x01, 0x01, 0x02 };

    AlgorithmParameterSpec algParamSpec = new IvParameterSpec(initVector);
    Cipher m_encrypter = Cipher.getInstance("DES/CBC/PKCS5Padding");
    Cipher m_decrypter = Cipher.getInstance("DES/CBC/PKCS5Padding");

    m_encrypter.init(Cipher.ENCRYPT_MODE, key, algParamSpec);
    m_decrypter.init(Cipher.DECRYPT_MODE, key, algParamSpec);

    FileInputStream fis = new FileInputStream("cipherTest.in");
    FileOutputStream fos = new FileOutputStream("cipherTest.out");
    int dataInputSize = fis.available();

    byte[] inputBytes = new byte[dataInputSize];
    fis.read(inputBytes);/*from   www  .  j  av a  2s. co m*/
    write(inputBytes, fos);
    fos.flush();
    fis.close();
    fos.close();

    String inputFileAsString = new String(inputBytes);
    System.out.println("INPUT FILE CONTENTS\n" + inputFileAsString + "\n");

    System.out.println("File encrypted and saved to disk\n");

    fis = new FileInputStream("cipherTest.out");

    byte[] decrypted = new byte[dataInputSize];
    read(decrypted, fis);

    fis.close();
    String decryptedAsString = new String(decrypted);

    System.out.println("DECRYPTED FILE:\n" + decryptedAsString + "\n");

}

From source file:Main.java

public static void main(String[] args) {

    char[] arr = { 'H', 'e', 'l', 'l', 'o' };

    try {/*from   w  w  w  .  j ava 2 s.  co  m*/

        OutputStream os = new FileOutputStream("test.txt");
        OutputStreamWriter writer = new OutputStreamWriter(os);

        // create a new FileInputStream to read what we write
        FileInputStream in = new FileInputStream("test.txt");

        // write something in the file
        writer.write(arr, 0, 3);

        // flush the stream
        writer.flush();

        // read what we write
        for (int i = 0; i < 3; i++) {
            System.out.print((char) in.read());
        }

        writer.close();
        in.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    FileInputStream fis = new FileInputStream("/home/username/data.txt");

    int i = 0;/*from ww  w. j av a  2s . c  o m*/

    int count = 0;

    while ((i = fis.read()) != -1) {
        if (i != -1) {
            System.out.printf("%02X ", i);
            count++;
        }

        if (count == 16) {
            System.out.println("");
            count = 0;
        }
    }
    fis.close();
}

From source file:cc.twittertools.util.ExtractSubcollection.java

@SuppressWarnings("static-access")
public static void main(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("dir").hasArg().withDescription("source collection directory")
            .create(COLLECTION_OPTION));
    options.addOption(//from  w  ww .j  a va 2s.  c o  m
            OptionBuilder.withArgName("file").hasArg().withDescription("list of tweetids").create(ID_OPTION));

    CommandLine cmdline = null;
    CommandLineParser parser = new GnuParser();
    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        System.exit(-1);
    }

    if (!cmdline.hasOption(COLLECTION_OPTION) || !cmdline.hasOption(ID_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(ExtractSubcollection.class.getName(), options);
        System.exit(-1);
    }

    String collectionPath = cmdline.getOptionValue(COLLECTION_OPTION);

    LongOpenHashSet tweetids = new LongOpenHashSet();
    File tweetidsFile = new File(cmdline.getOptionValue(ID_OPTION));
    if (!tweetidsFile.exists()) {
        System.err.println("Error: " + tweetidsFile + " does not exist!");
        System.exit(-1);
    }
    LOG.info("Reading tweetids from " + tweetidsFile);

    FileInputStream fin = new FileInputStream(tweetidsFile);
    BufferedReader br = new BufferedReader(new InputStreamReader(fin));

    String s;
    while ((s = br.readLine()) != null) {
        tweetids.add(Long.parseLong(s));
    }
    br.close();
    fin.close();
    LOG.info("Read " + tweetids.size() + " tweetids.");

    File file = new File(collectionPath);
    if (!file.exists()) {
        System.err.println("Error: " + file + " does not exist!");
        System.exit(-1);
    }

    PrintStream out = new PrintStream(System.out, true, "UTF-8");
    StatusStream stream = new JsonStatusCorpusReader(file);
    Status status;
    while ((status = stream.next()) != null) {
        if (tweetids.contains(status.getId())) {
            out.println(status.getJsonObject().toString());
        }
    }
    stream.close();
    out.close();
}

From source file:FileIOApp.java

public static void main(String args[]) throws IOException {
    FileOutputStream outStream = new FileOutputStream("test.txt");
    String s = "This is a test.";
    for (int i = 0; i < s.length(); ++i)
        outStream.write(s.charAt(i));//ww w. j  a v  a 2 s . c o m
    outStream.close();
    FileInputStream inStream = new FileInputStream("test.txt");
    int inBytes = inStream.available();
    System.out.println("inStream has " + inBytes + " available bytes");
    byte inBuf[] = new byte[inBytes];
    int bytesRead = inStream.read(inBuf, 0, inBytes);
    System.out.println(bytesRead + " bytes were read");
    System.out.println("They are: " + new String(inBuf));
    inStream.close();
    File f = new File("test.txt");
    f.delete();
}

From source file:Main.java

public static void main(String args[]) throws IOException, ClassNotFoundException {
    File file = new File("test.txt");
    FileOutputStream outFile = new FileOutputStream(file);
    ObjectOutputStream outStream = new ObjectOutputStream(outFile);
    TestClass1 t1 = new TestClass1(true, 9, 'A', 0.0001, "java");
    TestClass2 t2 = new TestClass2();
    String t3 = "This is a test.";
    Date t4 = new Date();
    outStream.writeObject(t1);// w  ww .ja  v a2  s  .c om
    outStream.writeObject(t2);
    outStream.writeObject(t3);
    outStream.writeObject(t4);
    outStream.close();
    outFile.close();
    FileInputStream inFile = new FileInputStream(file);
    ObjectInputStream inStream = new ObjectInputStream(inFile);
    System.out.println(inStream.readObject());
    System.out.println(inStream.readObject());
    System.out.println(inStream.readObject());
    System.out.println(inStream.readObject());
    inStream.close();
    inFile.close();
    file.delete();
}

From source file:Main.java

public static void main(String[] args) {
    try {/*from  w  ww.j a v  a  2  s. c  o  m*/
        OutputStream os = new FileOutputStream("test.txt");
        OutputStreamWriter writer = new OutputStreamWriter(os);

        // create a new FileInputStream to read what we write
        FileInputStream in = new FileInputStream("test.txt");

        // write something in the file
        writer.write(70);
        writer.write(71);
        writer.write(72);

        // flush the stream
        writer.flush();

        // read what we write
        for (int i = 0; i < 3; i++) {
            System.out.print((char) in.read());
        }
        writer.close();
        in.close();

    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:cc.twittertools.util.VerifySubcollection.java

@SuppressWarnings("static-access")
public static void main(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("dir").hasArg().withDescription("source collection directory")
            .create(COLLECTION_OPTION));
    options.addOption(/*w w  w. j  a  v  a 2 s  . c o m*/
            OptionBuilder.withArgName("file").hasArg().withDescription("list of tweetids").create(ID_OPTION));

    CommandLine cmdline = null;
    CommandLineParser parser = new GnuParser();
    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        System.exit(-1);
    }

    if (!cmdline.hasOption(COLLECTION_OPTION) || !cmdline.hasOption(ID_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(ExtractSubcollection.class.getName(), options);
        System.exit(-1);
    }

    String collectionPath = cmdline.getOptionValue(COLLECTION_OPTION);

    LongOpenHashSet tweetids = new LongOpenHashSet();
    File tweetidsFile = new File(cmdline.getOptionValue(ID_OPTION));
    if (!tweetidsFile.exists()) {
        System.err.println("Error: " + tweetidsFile + " does not exist!");
        System.exit(-1);
    }
    LOG.info("Reading tweetids from " + tweetidsFile);

    FileInputStream fin = new FileInputStream(tweetidsFile);
    BufferedReader br = new BufferedReader(new InputStreamReader(fin));

    String s;
    while ((s = br.readLine()) != null) {
        tweetids.add(Long.parseLong(s));
    }
    br.close();
    fin.close();
    LOG.info("Read " + tweetids.size() + " tweetids.");

    File file = new File(collectionPath);
    if (!file.exists()) {
        System.err.println("Error: " + file + " does not exist!");
        System.exit(-1);
    }

    LongOpenHashSet seen = new LongOpenHashSet();
    TreeMap<Long, String> tweets = Maps.newTreeMap();

    PrintStream out = new PrintStream(System.out, true, "UTF-8");
    StatusStream stream = new JsonStatusCorpusReader(file);
    Status status;
    int cnt = 0;
    while ((status = stream.next()) != null) {
        if (!tweetids.contains(status.getId())) {
            LOG.error("tweetid " + status.getId() + " doesn't belong in collection");
            continue;
        }
        if (seen.contains(status.getId())) {
            LOG.error("tweetid " + status.getId() + " already seen!");
            continue;
        }

        tweets.put(status.getId(), status.getJsonObject().toString());
        seen.add(status.getId());
        cnt++;
    }
    LOG.info("total of " + cnt + " tweets in subcollection.");

    for (Map.Entry<Long, String> entry : tweets.entrySet()) {
        out.println(entry.getValue());
    }

    stream.close();
    out.close();
}