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

    while (true) {
        System.out.print("Radius? ");
        String str = br.readLine();
        double radius;
        try {//from   w  w w . j  a v a2  s . c om
            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;
        }
        System.out.println("radius " + radius);
        return;
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    URL url = new URL("http://hostname:80/index.html");

    BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
    String str;//www .ja v a2 s  . c  o m
    while ((str = in.readLine()) != null) {
        System.out.println(str);
    }
    in.close();
}

From source file:Main.java

public static void main(String[] ap) {
    String line = null;//  www  . j  a  v  a 2s . c o m
    int val = 0;
    try {
        BufferedReader is = new BufferedReader(new InputStreamReader(System.in));
        line = is.readLine();
        val = Integer.parseInt(line);
    } catch (NumberFormatException ex) {
        System.err.println("Not a valid number: " + line);
    } catch (IOException e) {
        System.err.println("Unexpected IO ERROR: " + e);
    }
    System.out.println("I read this number: " + val);
}

From source file:MainClass.java

public static void main(String args[]) {
    try {/*from   w  w w.j  a  v a  2 s  .  c  om*/
        FileReader fr = new FileReader(args[0]);
        BufferedReader br = new BufferedReader(fr);

        String s;
        while ((s = br.readLine()) != null)
            System.out.println(s);

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

From source file:Main.java

public static void main(String args[]) throws Exception {
    FileReader fr = new FileReader(args[0]);
    BufferedReader br = new BufferedReader(fr);
    StreamTokenizer st = new StreamTokenizer(br);
    st.whitespaceChars(',', ',');
    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:// ww w.j a  v  a2  s .c  om
            System.out.println(st.lineno() + ") " + (char) st.ttype);
        }
    }
    fr.close();
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    FileReader fr = new FileReader(args[0]);
    BufferedReader br = new BufferedReader(fr);
    StreamTokenizer st = new StreamTokenizer(br);
    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://from  w  w  w  .ja va2  s  .c o m
            System.out.println(st.lineno() + ") " + (char) st.ttype);
        }
    }
    fr.close();
}

From source file:FileReaderDemo.java

public static void main(String args[]) throws IOException {
    FileReader fr = new FileReader("FileReaderDemo.java");
    BufferedReader br = new BufferedReader(fr);
    String s;//  ww  w.  j  a v a  2s .c om

    while ((s = br.readLine()) != null) {
        System.out.println(s);
    }

    fr.close();
}

From source file:Main.java

public static void main(String args[]) throws IOException {
    BufferedReader inData = new BufferedReader(new InputStreamReader(System.in));
    StreamTokenizer inStream = new StreamTokenizer(inData);
    inStream.commentChar('#');
    boolean eof = false;
    do {/*from w w  w .j a  va 2s  . c o  m*/
        int token = inStream.nextToken();
        switch (token) {
        case StreamTokenizer.TT_EOF:
            System.out.println("EOF encountered.");
            eof = true;
            break;
        case StreamTokenizer.TT_EOL:
            System.out.println("EOL encountered.");
            break;
        case StreamTokenizer.TT_WORD:
            System.out.println("Word: " + inStream.sval);
            break;
        case StreamTokenizer.TT_NUMBER:
            System.out.println("Number: " + inStream.nval);
            break;
        default:
            System.out.println((char) token + " encountered.");
            if (token == '!')
                eof = true;
        }
    } while (!eof);
}

From source file:StreamTokenizerDemo.java

public static void main(String args[]) throws Exception {
    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://  www  . ja  va2s  . c  o  m
            System.out.println(st.lineno() + ") " + (char) st.ttype);
        }
    }

    fr.close();
}

From source file:URLGet.java

public static void main(String[] args) {
    BufferedReader in = null;//w  w w . ja v  a 2s  . co m
    if (args.length == 1) {
        try {
            URL url = new URL(args[0]);
            in = new BufferedReader(new InputStreamReader(url.openStream()));
            String line = null;
            while ((line = in.readLine()) != null)
                System.out.println(line);
        } catch (MalformedURLException ex) {
            System.err.println(ex);
        } catch (FileNotFoundException ex) {
            System.err.println("Failed to open stream to URL: " + ex);
        } catch (IOException ex) {
            System.err.println("Error reading URL content: " + ex);
        }
        if (in != null)
            try {
                in.close();
            } catch (IOException ex) {
            }
    } else
        System.err.println("Usage: URLGet URL");
}