Example usage for java.io BufferedReader BufferedReader

Introduction

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

Prototype

public BufferedReader(Reader in)

Source Link

Document

Creates a buffering character-input stream that uses a default-sized input buffer.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader("ravi.txt"));
    while (true) {
        String line = br.readLine();
        if (line == null)
            break;
        if (!UCODE_PATTERN.matcher(line).matches()) {
            System.err.println("Bad input: " + line);
        } else {// w  w w . j  ava  2s. com
            String hex = line.substring(2, 6);
            int number = Integer.parseInt(hex, 16);
            System.out.println(hex + " -> " + ((char) number));
        }
    }
}

From source file:Main.java

public static void main(String argv[]) throws Exception {
    String line;/*from w  w w . j  a va 2s  .  c o  m*/
    Process p = Runtime.getRuntime().exec("psql -U username -d dbname -h serverhost -f scripfile.sql");
    BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
    while ((line = input.readLine()) != null) {
        System.out.println(line);
    }
    input.close();
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    URL u = new URL(args[0]);
    URLConnection uc = u.openConnection();
    BufferedReader br = new BufferedReader(new InputStreamReader(uc.getInputStream()));
    String s = br.readLine();//w w w. ja va  2s .  com
    while (s != null) {
        System.out.println(s);
        s = br.readLine();
    }
}

From source file:MainClass.java

public static void main(String args[]) {
    try {// www.  jav  a2s. c  o m

        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);

        while (true) {

            System.out.print("Radius? ");

            String str = br.readLine();
            double radius;
            try {
                radius = Double.valueOf(str).doubleValue();
            } catch (NumberFormatException nfe) {
                System.out.println("Incorrect format!");
                continue;
            }

            if (radius <= 0) {
                System.out.println("Radius must be positive!");
                continue;
            }

            double area = Math.PI * radius * radius;
            System.out.println("Area is " + area);
            return;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String filename = "infile.txt";
    String patternStr = "pattern";
    BufferedReader rd = new BufferedReader(new FileReader(filename));

    Pattern pattern = Pattern.compile(patternStr);
    Matcher matcher = pattern.matcher("\\D");

    String line = null;//w  ww. j  av a 2 s .  c  o m
    while ((line = rd.readLine()) != null) {
        matcher.reset(line);
        if (matcher.find()) {
            // line matches the pattern
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    URL url = new URL("http://www.google.com");

    BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
    BufferedWriter writer = new BufferedWriter(new FileWriter("data.html"));

    String line;/*from  w w w.  j  a va  2 s  .c o m*/
    while ((line = reader.readLine()) != null) {
        System.out.println(line);
        writer.write(line);
        writer.newLine();
    }

    reader.close();
    writer.close();
}

From source file:MainClass.java

public static void main(String args[]) {

    try {/* w w w .  j  a  va2 s. c o m*/
        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);
    }
}

From source file:MainClass.java

public static void main(String args[]) {

    try {/*from w ww . j  a  va2  s  . c om*/
        FileReader fr = new FileReader(args[0]);

        BufferedReader br = new BufferedReader(fr);

        StreamTokenizer st = new StreamTokenizer(br);

        // Consider end-of-line as a token
        st.eolIsSignificant(true);

        // Declare variable to count lines
        int lines = 1;

        // Process tokens
        while (st.nextToken() != StreamTokenizer.TT_EOF) {
            switch (st.ttype) {
            case StreamTokenizer.TT_EOL:
                ++lines;
            }
        }

        System.out.println("There are " + lines + " lines");

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    URL yahoo = new URL("http://www.yahoo.com/");
    URLConnection yc = yahoo.openConnection();
    BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));
    String inputLine;//from ww  w.  j a v a2  s.  c o m

    while ((inputLine = in.readLine()) != null)
        System.out.println(inputLine);
    in.close();
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Runtime r = Runtime.getRuntime();
    String[] nargs = { "sh", "-c", "for i in 1 2 3; do echo $i; done" };
    Process p = r.exec(nargs);/*from  w w w  .ja  v a 2 s . c o m*/
    BufferedReader is = new BufferedReader(new InputStreamReader(p.getInputStream()));
    String line;
    while ((line = is.readLine()) != null)
        System.out.println(line);
}