Example usage for java.io File File

Introduction

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

Prototype

public File(URI uri)

Source Link

Document

Creates a new File instance by converting the given file: URI into an abstract pathname.

Usage

From source file:Main.java

public static void main(final String[] args) throws IOException {
    File infile = new File("/tmp/utf16.txt");
    FileInputStream inputStream = new FileInputStream(infile);
    Reader in = new InputStreamReader(inputStream, "UTF-16");
    int read;//ww  w. j  av a2s. c  o m
    while ((read = in.read()) != -1) {
        System.out.print(Character.toChars(read));
    }
    in.close();
}

From source file:GuaranteeAFile.java

public static void main(String[] args) {

    String filename = "C:/myFile.txt";
    File aFile = new File(filename);
    if (aFile.isDirectory()) {
        System.out.println("The path " + aFile.getPath() + " does not specify a file. Program aborted.");
        System.exit(1);/*from ww  w.  ja v  a2 s . c o  m*/
    }
    if (!aFile.isFile()) {
        aFile = aFile.getAbsoluteFile();
        File parentDir = new File(aFile.getParent());
        if (!parentDir.exists()) {
            parentDir.mkdirs();
        }
    }
    FileOutputStream outputFile = null;
    try {
        outputFile = new FileOutputStream(aFile, true);
    } catch (FileNotFoundException e) {
        e.printStackTrace(System.err);
    }
}

From source file:Main.java

public static void main(String[] args) {
    boolean areFilesIdentical = true;
    File file1 = new File("c:\\file1.txt");
    File file2 = new File("c:\\file2.txt");
    if (!file1.exists() || !file2.exists()) {
        System.out.println("One or both files do not exist");
        System.out.println(false);
    }//from   w  w  w  .  j  a  v  a2 s  . c  o m
    System.out.println("length:" + file1.length());
    if (file1.length() != file2.length()) {
        System.out.println("lengths not equal");
        System.out.println(false);
    }
    try {
        FileInputStream fis1 = new FileInputStream(file1);
        FileInputStream fis2 = new FileInputStream(file2);
        int i1 = fis1.read();
        int i2 = fis2.read();
        while (i1 != -1) {
            if (i1 != i2) {
                areFilesIdentical = false;
                break;
            }
            i1 = fis1.read();
            i2 = fis2.read();
        }
        fis1.close();
        fis2.close();
    } catch (IOException e) {
        System.out.println("IO exception");
        areFilesIdentical = false;
    }
    System.out.println(areFilesIdentical);
}

From source file:Main.java

public static void main(String[] args) {
    File outputFile = new File("test.txt");

    try (FileChannel fileChannel = new FileOutputStream(outputFile).getChannel()) {
        String text = getText();/*ww w  .ja v  a 2 s.co  m*/
        byte[] byteData = text.toString().getBytes("UTF-8");
        ByteBuffer buffer = ByteBuffer.wrap(byteData);
        fileChannel.write(buffer);
    } catch (IOException e1) {
        e1.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] args) {
    File inputFile = new File("test1.txt");
    if (!inputFile.exists()) {
        System.out.println("The input file " + inputFile.getAbsolutePath() + "  does  not  exist.");
        System.out.println("Aborted the   file reading process.");
        return;/*w  w w  .  j  a  va  2 s  .  co  m*/
    }
    try (FileChannel fileChannel = new FileInputStream(inputFile).getChannel()) {
        ByteBuffer buffer = ByteBuffer.allocate(1024);
        while (fileChannel.read(buffer) > 0) {
            buffer.flip();
            while (buffer.hasRemaining()) {
                byte b = buffer.get();
                System.out.print((char) b);
            }
            buffer.clear();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("myimage.gif");
    FileInputStream fis = new FileInputStream(file);
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@//server.local:1521/prod", "scott",
            "tiger");
    conn.setAutoCommit(false);//from  w w w .  ja  va2 s . com
    PreparedStatement ps = conn.prepareStatement("insert into images values (?,?)");
    ps.setString(1, file.getName());
    ps.setBinaryStream(2, fis, (int) file.length());
    ps.executeUpdate();
    ps.close();
    fis.close();

}

From source file:Main.java

public static void main(String[] args) {
    boolean areFilesIdentical = true;
    File file1 = new File("c:\\file1.txt");
    File file2 = new File("c:\\file2.txt");

    if (!file1.exists() || !file2.exists()) {
        System.out.println("One or both files do not exist");
        System.out.println(false);
    }//from  w  ww.  ja v  a  2  s  .com

    System.out.println("length:" + file1.length());
    if (file1.length() != file2.length()) {
        System.out.println("lengths not equal");
        System.out.println(false);
    }

    try {
        FileInputStream fis1 = new FileInputStream(file1);
        FileInputStream fis2 = new FileInputStream(file2);
        int i1 = fis1.read();
        int i2 = fis2.read();
        while (i1 != -1) {
            if (i1 != i2) {
                areFilesIdentical = false;
                break;
            }
            i1 = fis1.read();
            i2 = fis2.read();
        }
        fis1.close();
        fis2.close();
    } catch (IOException e) {
        System.out.println("IO exception");
        areFilesIdentical = false;
    }
    System.out.println(areFilesIdentical);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    File aFile = new File("C:/test.bin");
    RandomAccessFile ioFile = new RandomAccessFile(aFile, " rw");

    FileChannel ioChannel = ioFile.getChannel();
    final int PRIMESREQUIRED = 10;
    long[] primes = new long[PRIMESREQUIRED];

    int index = 0;
    final long REPLACEMENT = 999999L;

    final int PRIMECOUNT = (int) ioChannel.size() / 8;
    MappedByteBuffer buf = ioChannel.map(FileChannel.MapMode.READ_WRITE, 0L, ioChannel.size()).load();
    ioChannel.close();//from w w w . java  2 s .  com

    for (int i = 0; i < PRIMESREQUIRED; i++) {
        index = 8 * (int) (PRIMECOUNT * Math.random());
        primes[i] = buf.getLong(index);
        buf.putLong(index, REPLACEMENT);
    }

    for (long prime : primes) {
        System.out.printf("%12d", prime);
    }
    ioFile.close();
}

From source file:Test.java

public static void main(String[] args) throws Exception {
    Path path = Paths.get(new URI("file:///C:/home/docs/users.txt"));
    File file = new File("C:\\home\\docs\\users.txt");
    Path toPath = file.toPath();/* ww  w  . j  av  a  2s  .  c o m*/
    System.out.println(toPath.equals(path));
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    String fileName = "randomaccessfile.txt";
    File fileObject = new File(fileName);

    if (!fileObject.exists()) {
        initialWrite(fileName);/*from w  w w. j a  v  a2 s.  c o m*/
    }
    readFile(fileName);
    readFile(fileName);
}