Example usage for java.io FileReader FileReader

Introduction

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

Prototype

public FileReader(FileDescriptor fd)

Source Link

Document

Creates a new FileReader , given the FileDescriptor to read, using the platform's java.nio.charset.Charset#defaultCharset() default charset .

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    int wordCount = 0, numberCount = 0;

    StreamTokenizer sTokenizer = new StreamTokenizer(new FileReader("yourFile.txt"));

    while (sTokenizer.nextToken() != StreamTokenizer.TT_EOF) {
        if (sTokenizer.ttype == StreamTokenizer.TT_WORD)
            wordCount++;/*w ww.ja v a2s  .  com*/
        else if (sTokenizer.ttype == StreamTokenizer.TT_NUMBER)
            numberCount++;
    }

    System.out.println("Number of words in file: " + wordCount);
    System.out.println("Number of numbers in file: " + numberCount);

}

From source file:Main.java

public static void main(String[] args) throws IOException {
    // create new reader
    FileReader fr = new FileReader("C:/test.txt");
    LineNumberReader lnr = new LineNumberReader(fr);

    // reads and prints data from reader
    System.out.println((char) lnr.read());
    System.out.println((char) lnr.read());

    // mark invoked at this position
    lnr.mark(0);/*from   w w w .j a va  2  s .c o m*/
    System.out.println("mark() invoked");
    System.out.println((char) lnr.read());
    System.out.println((char) lnr.read());

    // if this reader supports mark() an reset()
    if (lnr.markSupported()) {
        // reset() repositioned the reader to the mark
        lnr.reset();
        System.out.println("reset() invoked");
        System.out.println((char) lnr.read());
        System.out.println((char) lnr.read());
    }
    lnr.close();
}

From source file:Main.java

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

    int i;/*from   w w w . j  av a 2s  .  co  m*/

    // create new reader
    FileReader fr = new FileReader("C:/test.txt");
    LineNumberReader lnr = new LineNumberReader(fr);

    while ((i = lnr.read()) != -1) {
        // converts int to char
        char c = (char) i;

        // prints character
        System.out.println(c);
    }
    lnr.close();
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    int i;/*from  w  ww  .  j  ava 2  s.  c  o  m*/
    // create new reader
    FileReader fr = new FileReader("C:/test.txt");
    LineNumberReader lnr = new LineNumberReader(fr, 200);

    // read till the end of the stream
    while ((i = lnr.read()) != -1) {
        // skip one byte
        lnr.skip(1);

        // converts integer to char
        char c = (char) i;

        // prints char
        System.out.print(c);
    }
    lnr.close();
}

From source file:MainClass.java

public static void main(String[] args) throws IOException {
    // 1. Reading input by lines:
    BufferedReader in = new BufferedReader(new FileReader("IOStreamDemo.java"));
    String s, s2 = new String();
    while ((s = in.readLine()) != null)
        s2 += s + "\n";
    in.close();//from w w  w .j  ava 2 s  .  c o  m

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    BufferedReader in = null;//from  ww w  . ja v a 2s. co m
    in = new BufferedReader(new FileReader("fileeditor.txt"));
    StreamTokenizer st = new StreamTokenizer(in);
    st.eolIsSignificant(false);
    // remove comment handling
    st.slashSlashComments(false);
    st.slashStarComments(false);

    while (st.nextToken() != StreamTokenizer.TT_EOF) {
        if (st.ttype == StreamTokenizer.TT_NUMBER) {
            // the default is to treat numbers differently than words
            // also the numbers are doubles
            System.out.println((int) st.nval);
        } else {
            System.out.println(st.sval);
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    int i;/*from w w w  .  j  a  v  a 2s.com*/
    // create new reader
    FileReader fr = new FileReader("C:/test.txt");
    LineNumberReader lnr = new LineNumberReader(fr);

    // read till the end of the stream
    while ((i = lnr.read()) != -1) {
        // skip one byte
        lnr.skip(1);

        // converts integer to char
        char c = (char) i;

        // prints char
        System.out.print(c);
    }
    lnr.close();
}

From source file:Main.java

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

    String str;/*from   w ww.  j  av a  2 s .  com*/
    // create new reader
    FileReader fr = new FileReader("C:/test.txt");
    LineNumberReader lnr = new LineNumberReader(fr);

    // read lines till the end of the stream
    while ((str = lnr.readLine()) != null) {
        int i = lnr.getLineNumber();
        System.out.print("(" + i + ")");

        // prints string
        System.out.println(str);
    }
    lnr.close();
}

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;// ww w .  j  av  a2 s. c  o  m
    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:MainClass.java

public static void main(String args[]) {

    try {// w w  w.j a  v a2 s .  c om
        FileReader fr = new FileReader(args[0]);
        BufferedReader br = new BufferedReader(fr);
        StreamTokenizer st = new StreamTokenizer(br);

        st.ordinaryChar('.');

        st.wordChars('\'', '\'');

        while (st.nextToken() != StreamTokenizer.TT_EOF) {
            switch (st.ttype) {
            case StreamTokenizer.TT_WORD:
                System.out.println(st.lineno() + ") " + st.sval);
                break;
            case StreamTokenizer.TT_NUMBER:
                System.out.println(st.lineno() + ") " + st.nval);
                break;
            default:
                System.out.println(st.lineno() + ") " + (char) st.ttype);
            }
        }

        fr.close();
    } catch (Exception e) {
        System.out.println("Exception: " + e);
    }
}