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(String[] args) throws Exception {
    boolean areFilesIdentical = true;
    File file1 = new File("c:\\file1.txt");
    File file2 = new File("c:\\file2.txt");
    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;/*from w  w w .ja v  a 2s.  com*/
            break;
        }
        i1 = fis1.read();
        i2 = fis2.read();
    }
    fis1.close();
    fis2.close();
    System.out.println(areFilesIdentical);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("filename");
    // Create a read-only memory-mapped file
    FileChannel roChannel = new RandomAccessFile(file, "r").getChannel();

    ByteBuffer readonlybuffer = roChannel.map(FileChannel.MapMode.READ_ONLY, 0, (int) roChannel.size());

}

From source file:Main.java

public static void main(String[] argv) {
    String filename = File.separator + "tmp";
    JFileChooser fc = new JFileChooser(new File(filename));

    // Show open dialog
    fc.showOpenDialog(null);//  www  . ja  v  a 2  s .c o  m
    File selFile = fc.getSelectedFile();

    // Show save dialog
    fc.showSaveDialog(null);
    selFile = fc.getSelectedFile();

}

From source file:MainClass.java

public static void main(String[] a) {
    File aFile = new File("charData.txt");
    FileInputStream inFile = null;
    try {/*ww w.  j a  va  2 s . c  o m*/
        inFile = new FileInputStream(aFile);
    } catch (FileNotFoundException e) {
        e.printStackTrace(System.err);
        System.exit(1);
    }
    FileChannel inChannel = inFile.getChannel();
}

From source file:MainClass.java

public static void main(final String[] args) {
    File path = new File(".");
    String[] list;//w w  w.  jav  a2s. co  m
    if (args.length == 0)
        list = path.list();
    else
        list = path.list(new FilenameFilter() {
            private Pattern pattern = Pattern.compile(args[0]);

            public boolean accept(File dir, String name) {
                return pattern.matcher(new File(name).getName()).matches();
            }
        });
    Arrays.sort(list);
    for (int i = 0; i < list.length; i++)
        System.out.println(list[i]);
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    FileInputStream fis = new FileInputStream(new File("C://test.txt"));

    // skip bytes from file input stream
    fis.skip(4);//w  w  w . j  a  v  a 2 s.c  o  m

    // read bytes from this stream
    int i = fis.read();

    // converts integer to character
    char c = (char) i;
    System.out.print("Character read: " + c);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    FileOutputStream fos = new FileOutputStream(new File("C:/Demo"));
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    bos.write("this is a test".getBytes());
    bos.flush();//ww w. j  a  va  2  s. c om
    bos.close();
}

From source file:MainClass.java

public static void main(String[] args) throws IOException {
    RandomAccessFile raf = new RandomAccessFile(new File("temp.tmp"), "rw");
    raf.writeInt(1);//www.j  a va2s  .  c  o m
    for (int i = 0; i < 10; i++) {
        raf.seek(raf.length() - 4);
        raf.writeInt(raf.readInt());
    }
    raf.close();

}

From source file:Delete.java

public static void main(String[] args) {
    String fileName = "file.txt";
    // A File object to represent the filename
    File f = new File(fileName);

    // Make sure the file or directory exists and isn't write protected
    if (!f.exists())
        throw new IllegalArgumentException("Delete: no such file or directory: " + fileName);

    if (!f.canWrite())
        throw new IllegalArgumentException("Delete: write protected: " + fileName);

    // If it is a directory, make sure it is empty
    if (f.isDirectory()) {
        String[] files = f.list();
        if (files.length > 0)
            throw new IllegalArgumentException("Delete: directory not empty: " + fileName);
    }/*from  www  .j a  va  2 s.com*/

    // Attempt to delete it
    boolean success = f.delete();

    if (!success)
        throw new IllegalArgumentException("Delete: deletion failed");
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ZipFile zipFile = new ZipFile(new File("testfile.zip"), ZipFile.OPEN_READ);

    System.out.println(zipFile.getName());
}