Example usage for java.io RandomAccessFile writeUTF

Introduction

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

Prototype

public final void writeUTF(String str) throws IOException 

Source Link

Document

Writes a string to the file using modified UTF-8 encoding in a machine-independent manner.

Usage

From source file:Main.java

public static void main(String[] args) {
    try {/*from  w  ww  . j ava2s . co  m*/

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("Hello World from java2s.com");

        // set the file pointer at 0 position
        raf.seek(0);

        // print the byte
        System.out.println(raf.readUnsignedByte());

        // set the file pointer at 7 position
        raf.seek(7);

        System.out.println(raf.readUnsignedByte());
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

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From source file:Main.java

public static void main(String[] args) {
    try {/*from w  w w.java  2 s . c  o  m*/

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("java2s.com Hello World");

        // set the file pointer at 0 position
        raf.seek(0);

        // read the first byte and print it
        System.out.println(raf.read());

        // set the file pointer at 4rth position
        raf.seek(4);

        // read the first byte and print it
        System.out.println(raf.read());
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

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From source file:Main.java

public static void main(String[] args) {
    try {/* w  w  w.  j av a2  s.  c o m*/
        byte[] b1 = { 1, 2, 3 };
        byte[] b2 = { 1, 2, 3, 4, 5, 6, 7, 8 };

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("java2s.com Hello World");

        // set the file pointer at 0 position
        raf.seek(0);

        // read the first 8 bytes and print the number of bytes read
        System.out.println(raf.read(b1));

        // set the file pointer at 0 position
        raf.seek(0);

        // read the first 8 bytes and print the number of bytes read
        System.out.println(raf.read(b2));
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

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From source file:Main.java

public static void main(String[] args) {
    try {//from  w ww .  j  av  a 2  s .  c  om
        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("Hello World");

        // set the file pointer at 0 position
        raf.seek(0);

        // print the line
        System.out.println(raf.readLine());

        // set the file pointer at 0 position
        raf.seek(0);

        raf.writeUTF("This is an example \n Hello World");

        raf.seek(0);
        // print the line
        System.out.println(raf.readLine());
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

---

From source file:Main.java

public static void main(String[] args) {
    try {//from  ww  w  .  ja v  a 2s  .c o  m
        byte[] b1 = { 1, 2, 3 };
        byte[] b2 = { 1, 2, 3, 4, 5, 6, 7, 8 };

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("Hello World from java2s.com");

        // set the file pointer at 0 position
        raf.seek(0);

        // read 2 bytes, starting from 1
        System.out.println(raf.read(b1, 1, 2));

        // set the file pointer at 0 position
        raf.seek(0);

        // read 3 bytes, starting from 4rth
        System.out.println(raf.read(b2, 4, 3));
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

---

From source file:Main.java

public static void main(String[] args) {
    try {/*from   w ww  .j  ava  2  s.  c om*/

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("Hello World from java2s.com");

        // set the file pointer at 0 position
        raf.seek(0);

        // read byte
        System.out.println(raf.readByte());

        // set the file pointer at 0 position
        raf.seek(0);

        // write 0 at the start
        raf.write(0);

        // read byte
        System.out.println(raf.readByte());
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

---

From source file:Main.java

public static void main(String[] args) {
    try {/*from   ww w  .  ja  v a  2s  .c o  m*/
        String s = "Hello world from java2s.com";

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF(s);

        // set the file pointer at 0 position
        raf.seek(0);

        // create an array equal to the length of raf
        byte[] arr = new byte[(int) raf.length()];

        // read the file
        raf.readFully(arr);

        // create a new string based on arr
        String s2 = new String(arr);

        System.out.println(s2);
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

---

From source file:Main.java

public static void main(String[] args) {
    try {/*from  w w  w.  j a  v  a 2s  .  c om*/

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("java2s.com Hello World");

        // set the file pointer at 0 position
        raf.seek(0);

        // read and print the contents of the file
        System.out.println(raf.readUTF());

        // print the length of the file
        System.out.println(raf.length());

        // write something more in the file
        raf.writeUTF("This is an example");

        // print the length of the file
        System.out.println(raf.length());
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

---

From source file:Main.java

public static void main(String[] args) {
    try {/*from www .  j a va  2 s .c om*/

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF("Hello World from java2s.com");

        // set the file pointer at 0 position
        raf.seek(0);

        // read boolean
        System.out.println(raf.readBoolean());

        // set the file pointer at 0 position
        raf.seek(0);

        // write 0 at the start
        raf.write(0);

        // read boolean
        System.out.println(raf.readBoolean());
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

---

From source file:Main.java

public static void main(String[] args) {
    try {//from w  w w  .  j ava  2 s .c o  m
        String s = "Hello world from java2s.com";

        RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

        // write something in the file
        raf.writeUTF(s);

        // set the file pointer at 0 position
        raf.seek(0);

        // create an array equal to the length of raf
        byte[] arr = new byte[10];

        // read the file
        raf.readFully(arr, 3, 7);

        // create a new string based on arr
        String s2 = new String(arr);

        // print it
        System.out.println(s2);
        raf.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

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