Example usage for java.io PushbackInputStream PushbackInputStream

Introduction

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

Prototype

public PushbackInputStream(InputStream in) 

Source Link

Document

Creates a PushbackInputStream with a 1-byte pushback buffer, and saves its argument, the input stream in, for later use.

Usage

From source file:Main.java

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

    try (PushbackInputStream pis = new PushbackInputStream(new FileInputStream(srcFile))) {
        byte byteData;
        while ((byteData = (byte) pis.read()) != -1) {
            System.out.print((char) byteData);
            pis.unread(byteData);//from  ww w  .j a va  2  s.c o m
            // Reread the byte we unread
            byteData = (byte) pis.read();
            System.out.print((char) byteData);
        }
    } catch (Exception e2) {
        e2.printStackTrace();
    }
}

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From source file:Main.java

public static void main(String args[]) throws IOException {
    byte buf[] = "==  = ".getBytes();
    PushbackInputStream f = new PushbackInputStream(new ByteArrayInputStream(buf));
    int c;/* w ww . ja v  a  2  s  .  c  o  m*/
    while ((c = f.read()) != -1) {
        switch (c) {
        case '=':
            c = f.read();
            if (c == '=')
                System.out.print(".eq.");
            else {
                System.out.print("=");
                f.unread(c);
            }
            break;
        default:
            System.out.print((char) c);
            break;
        }
    }
}

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From source file:Main.java

public static void main(String[] args) {
    byte[] arrByte = new byte[1024];
    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    InputStream is = new ByteArrayInputStream(byteArray);
    PushbackInputStream pis = new PushbackInputStream(is);

    System.out.println(pis.markSupported());

}

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From source file:Main.java

public static void main(String[] args) {
    byte[] arrByte = new byte[1024];
    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    InputStream is = new ByteArrayInputStream(byteArray);
    PushbackInputStream pis = new PushbackInputStream(is);

    try {//from w ww. j  a v a2  s.  c om
        for (int i = 0; i < byteArray.length; i++) {

            arrByte[i] = (byte) pis.read();

            System.out.println((char) arrByte[i]);
        }

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

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From source file:Main.java

public static void main(String[] args) {
    byte[] arrByte = new byte[1024];
    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    InputStream is = new ByteArrayInputStream(byteArray);
    PushbackInputStream pis = new PushbackInputStream(is);

    try {/*from   w w  w  . ja  va2 s  . co m*/

        for (int i = 0; i < byteArray.length; i++) {

            arrByte[i] = (byte) pis.read();

            System.out.println((char) arrByte[i]);
        }

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

---

From source file:Main.java

public static void main(String[] args) {

    byte[] arrByte = new byte[1024];

    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    InputStream is = new ByteArrayInputStream(byteArray);
    PushbackInputStream pis = new PushbackInputStream(is);

    try {//ww w.j av  a  2s.c  om
        for (int i = 0; i < byteArray.length; i++) {

            arrByte[i] = (byte) pis.read();

            System.out.println((char) arrByte[i]);
        }

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

---

From source file:Main.java

public static void main(String[] args) {
    byte[] arrByte = new byte[1024];
    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    InputStream is = new ByteArrayInputStream(byteArray);
    PushbackInputStream pis = new PushbackInputStream(is);

    try {//from w  w w.  j  a  v a2 s  .  co m

        for (int i = 0; i < byteArray.length; i++) {

            arrByte[i] = (byte) pis.read();

            System.out.println((char) arrByte[i]);
        }

        pis.mark(5);

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

---

From source file:Main.java

public static void main(String[] args) {

    byte[] arrByte = new byte[1024];

    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    InputStream is = new ByteArrayInputStream(byteArray);
    PushbackInputStream pis = new PushbackInputStream(is);
    try {// ww  w  .  j  a  v a 2 s . co  m
        pis.skip(1);

        for (int i = 0; i < byteArray.length - 1; i++) {

            arrByte[i] = (byte) pis.read();

            System.out.println((char) arrByte[i]);
        }

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

---

From source file:Main.java

public static void main(String[] args) {
    byte[] arrByte = new byte[1024];
    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    try {/* w w  w .  j a v  a  2 s  .  com*/
        InputStream is = new ByteArrayInputStream(byteArray);
        PushbackInputStream pis = new PushbackInputStream(is);

        System.out.println(pis.available());

        for (int i = 0; i < byteArray.length; i++) {

            arrByte[i] = (byte) pis.read();

            System.out.println((char) arrByte[i]);
        }

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

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From source file:PushbackInputStreamDemo.java

public static void main(String args[]) throws IOException {
    String s = "if (a == 4) a = 0;\n";
    byte buf[] = s.getBytes();
    ByteArrayInputStream in = new ByteArrayInputStream(buf);
    PushbackInputStream f = new PushbackInputStream(in);
    int c;/*from   www.  ja v a 2 s  .  c  o m*/

    while ((c = f.read()) != -1) {
        switch (c) {
        case '=':
            if ((c = f.read()) == '=')
                System.out.print(".eq.");
            else {
                System.out.print("<-");
                f.unread(c);
            }
            break;
        default:
            System.out.print((char) c);
            break;
        }
    }
}

---

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