Example usage for java.io FileReader close

Introduction

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

Prototype

public void close() throws IOException

Source Link

Usage

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    int count = 0;
    double sum = 0.0;

    FileWriter fout = new FileWriter("test.txt");

    fout.write("2, 3.4,    5,6, 7.4, 9.1, 10.5, done");
    fout.close();/*from  www. j av a2s  .  c om*/

    FileReader fin = new FileReader("Test.txt");

    Scanner src = new Scanner(fin);

    src.useDelimiter(", *");

    while (src.hasNext()) {
        if (src.hasNextDouble()) {
            sum += src.nextDouble();
            count++;
        } else {
            String str = src.next();
            if (str.equals("done"))
                break;
            else {
                System.out.println("File format error.");
                return;
            }
        }
    }

    fin.close();
    System.out.println("Average is " + sum / count);
}

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  .java  2s  .  c  om
            System.out.println(st.lineno() + ") " + (char) st.ttype);
        }
    }
    fr.close();
}

From source file:MainClass.java

public static void main(String args[]) {

    try {/*from  w  w w . j  a  va 2 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 {
    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:/*from  w w w. j  a  va 2  s.com*/
            System.out.println(st.lineno() + ") " + (char) st.ttype);
        }
    }
    fr.close();
}

From source file:TaskManager.java

public static void main(String[] args) {
    String configFileName = "tasks.conf";

    if (args.length == 1) {
        configFileName = args[0];//  w  w w .j  av a 2s.  c o  m
    }

    File configFile = new File(configFileName);

    if (!configFile.exists() || !configFile.canRead()) {
        System.err.println("Can't read config file '" + configFileName + "'");
        System.exit(1);
    }

    FileReader configReader = null;

    try {
        configReader = new FileReader(configFile);
    } catch (FileNotFoundException fnfX) {
    }

    Tasks taskList = new Tasks(configReader);

    try {
        configReader.close();
    } catch (IOException ioX) {
    }

    TaskManager ex = new TaskManager(taskList);
}

From source file:ScanMixed.java

public static void main(String args[]) throws IOException {
    int i;/*from  ww  w. j a v a2  s  .  c  om*/
    double d;
    boolean b;
    String str;

    FileWriter fout = new FileWriter("test.txt");
    fout.write("Testing Scanner 10 12.2 one true two false");
    fout.close();

    FileReader fin = new FileReader("Test.txt");

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            i = src.nextInt();
            System.out.println("int: " + i);
        } else if (src.hasNextDouble()) {
            d = src.nextDouble();
            System.out.println("double: " + d);
        } else if (src.hasNextBoolean()) {
            b = src.nextBoolean();
            System.out.println("boolean: " + b);
        } else {
            str = src.next();
            System.out.println("String: " + str);
        }
    }

    fin.close();
}

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    int i;// w  ww.  ja va  2 s. c o m
    double d;
    boolean b;
    String str;

    FileWriter fout = new FileWriter("test.txt");
    fout.write("string true false 1 2 3 4.12");
    fout.close();

    FileReader fin = new FileReader("Test.txt");

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            i = src.nextInt();
            System.out.println("int: " + i);
        } else if (src.hasNextDouble()) {
            d = src.nextDouble();
            System.out.println("double: " + d);
        } else if (src.hasNextBoolean()) {
            b = src.nextBoolean();
            System.out.println("boolean: " + b);
        } else {
            str = src.next();
            System.out.println("String: " + str);
        }
    }

    fin.close();
}

From source file:MainClass.java

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

    int i;//from   ww  w .j  av a2  s .  com
    double d;
    boolean b;
    String str;

    FileWriter fout = new FileWriter("test.txt");
    fout.write("Testing Scanner 10 12.2 one true two false");
    fout.close();

    FileReader fin = new FileReader("Test.txt");

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            i = src.nextInt();
            System.out.println("int: " + i);
        } else if (src.hasNextDouble()) {
            d = src.nextDouble();
            System.out.println("double: " + d);
        } else if (src.hasNextBoolean()) {
            b = src.nextBoolean();
            System.out.println("boolean: " + b);
        } else {
            str = src.next();
            System.out.println("String: " + str);
        }
    }

    fin.close();
}

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://w  ww. j  a v a  2 s  .  c  o  m
            System.out.println(st.lineno() + ") " + (char) st.ttype);
        }
    }

    fr.close();
}

From source file:Main.java

public static void main(String args[]) {

    try {//w  w w . j  a  va  2  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_EOL) {
            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);
    }
}