Example usage for java.io BufferedReader read

Introduction

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

Prototype

public int read() throws IOException

Source Link

Document

Reads a single character.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    InputStream is = new FileInputStream("c:/test.txt");

    InputStreamReader isr = new InputStreamReader(is);

    BufferedReader br = new BufferedReader(isr);

    int value = 0;
    while ((value = br.read()) != -1) {
        char c = (char) value;
        System.out.println(c);//from  w  w w.j  a  v  a 2s . co m
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    InputStream is = new FileInputStream("c:/test.txt");

    InputStreamReader isr = new InputStreamReader(is);

    BufferedReader br = new BufferedReader(isr);

    System.out.println((char) br.read());
    System.out.println((char) br.read());

    br.mark(26);//from  www.  ja  v  a2 s. c o m
    System.out.println("mark() invoked");
    System.out.println((char) br.read());
    System.out.println((char) br.read());

    br.reset();
    System.out.println("reset() invoked");
    System.out.println((char) br.read());
    System.out.println((char) br.read());

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    InputStream is = new FileInputStream("c:/test.txt");

    InputStreamReader isr = new InputStreamReader(is);

    BufferedReader br = new BufferedReader(isr);

    br.close();/*  ww  w  .j av a 2  s . co  m*/

    // creates error
    br.read();

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Document document = new Document(PageSize.A4);
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();//from  w  ww .j  a v a2  s  .c  o m
    PdfContentByte cb = writer.getDirectContent();
    StringBuffer sb = new StringBuffer(1024);
    BufferedReader reader = new BufferedReader(new FileReader("a.txt"));
    int c;
    while ((c = reader.read()) > -1) {
        sb.append((char) c);
    }
    reader.close();
    ColumnText ct = new ColumnText(cb);
    ct.setSimpleColumn(new Phrase(sb.toString()), 36, 36, PageSize.A4.width() - 36, PageSize.A4.height() - 36,
            18, Element.ALIGN_JUSTIFIED);
    int status = ColumnText.START_COLUMN;
    while (ColumnText.hasMoreText(status)) {
        status = ct.go();
        ct.setYLine(PageSize.A4.height() - 36);
        document.newPage();
    }
    document.close();
}

From source file:Main.java

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

    String s = "from java2s.com";

    StringReader sr = new StringReader(s);

    BufferedReader br = new BufferedReader(sr);

    // reads and prints BufferedReader
    System.out.println((char) br.read());
    System.out.println((char) br.read());

    // mark invoked at this position
    br.mark(0);/*  w  ww . ja  v  a 2s .  co  m*/
    System.out.println("mark() invoked");
    System.out.println((char) br.read());
    System.out.println((char) br.read());

    // reset() repositioned the stream to the mark
    br.reset();
    System.out.println("reset() invoked");
    System.out.println((char) br.read());
    System.out.println((char) br.read());

}

From source file:Main.java

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

    String s = "from java2s.com";

    // create and assign a new string reader
    StringReader sr = new StringReader(s);

    // create new buffered reader
    BufferedReader br = new BufferedReader(sr);

    // reads and prints BufferedReader
    int value = 0;
    while ((value = br.read()) != -1) {
        // skips a character
        br.skip(1);//from  ww  w .  ja va  2  s  .  c om
        System.out.print((char) value);
    }

}

From source file:BRRead.java

public static void main(String args[]) throws IOException {
    char c;//w  ww. j  a  va 2s.co  m
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter characters, 'q' to quit.");
    do {
        c = (char) br.read();
        System.out.println(c);
    } while (c != 'q');
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader("in.txt"));
    BufferedWriter bw = new BufferedWriter(new FileWriter("out.txt"));
    int i;//from ww w  .j ava2  s.  c om
    do {
        i = br.read();
        if (i != -1) {
            if (Character.isLowerCase((char) i))
                bw.write(Character.toUpperCase((char) i));
            else if (Character.isUpperCase((char) i))
                bw.write(Character.toLowerCase((char) i));
            else
                bw.write((char) i);
        }
    } while (i != -1);
    br.close();
    bw.close();
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    FileOutputStream f = new FileOutputStream("test.zip");
    CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
    ZipOutputStream zos = new ZipOutputStream(csum);
    BufferedOutputStream out = new BufferedOutputStream(zos);
    zos.setComment("A test of Java Zipping");

    for (int i = 0; i < args.length; i++) {
        System.out.println("Writing file " + args[i]);
        BufferedReader in = new BufferedReader(new FileReader(args[i]));
        zos.putNextEntry(new ZipEntry(args[i]));
        int c;/*ww w .j a  v  a2  s.  co  m*/
        while ((c = in.read()) != -1)
            out.write(c);
        in.close();
    }
    out.close();

    System.out.println("Checksum: " + csum.getChecksum().getValue());

    System.out.println("Reading file");
    FileInputStream fi = new FileInputStream("test.zip");
    CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());
    ZipInputStream in2 = new ZipInputStream(csumi);
    BufferedInputStream bis = new BufferedInputStream(in2);
    ZipEntry ze;
    while ((ze = in2.getNextEntry()) != null) {
        System.out.println("Reading file " + ze);
        int x;
        while ((x = bis.read()) != -1)
            System.out.write(x);
    }
    System.out.println("Checksum: " + csumi.getChecksum().getValue());
    bis.close();

}

From source file:ZipCompress.java

public static void main(String[] args) throws IOException {
    FileOutputStream f = new FileOutputStream("test.zip");
    CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
    ZipOutputStream zos = new ZipOutputStream(csum);
    BufferedOutputStream out = new BufferedOutputStream(zos);
    zos.setComment("A test of Java Zipping");
    // No corresponding getComment(), though.
    for (int i = 0; i < args.length; i++) {
        System.out.println("Writing file " + args[i]);
        BufferedReader in = new BufferedReader(new FileReader(args[i]));
        zos.putNextEntry(new ZipEntry(args[i]));
        int c;//from  w  w  w  . jav a 2 s. co m
        while ((c = in.read()) != -1)
            out.write(c);
        in.close();
    }
    out.close();
    // Checksum valid only after the file has been closed!
    System.out.println("Checksum: " + csum.getChecksum().getValue());
    // Now extract the files:
    System.out.println("Reading file");
    FileInputStream fi = new FileInputStream("test.zip");
    CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());
    ZipInputStream in2 = new ZipInputStream(csumi);
    BufferedInputStream bis = new BufferedInputStream(in2);
    ZipEntry ze;
    while ((ze = in2.getNextEntry()) != null) {
        System.out.println("Reading file " + ze);
        int x;
        while ((x = bis.read()) != -1)
            System.out.write(x);
    }
    System.out.println("Checksum: " + csumi.getChecksum().getValue());
    bis.close();
    // Alternative way to open and read zip files:
    ZipFile zf = new ZipFile("test.zip");
    Enumeration e = zf.entries();
    while (e.hasMoreElements()) {
        ZipEntry ze2 = (ZipEntry) e.nextElement();
        System.out.println("File: " + ze2);
        // ... and extract the data as before
    }
}