Example usage for java.util Scanner hasNext

List of usage examples for java.util Scanner hasNext

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Introduction

In this page you can find the example usage for java.util Scanner hasNext.

Prototype

public boolean hasNext()

Source Link

Document

Returns true if this scanner has another token in its input.

Usage

From source file:Main.java

public static void main(String[] args) {

    String s = "java2s.com 1 + 1 = 2.0 true";

    Scanner scanner = new Scanner(s);

    while (scanner.hasNext()) {

        // if the next is byte with radix 7, print found and the byte
        if (scanner.hasNextByte()) {
            System.out.println("Found :" + scanner.nextByte(7));
        }/*from w w  w  .  ja va  2 s.  c  o  m*/

        // if a Byte is not found, print "Not Found" and the token
        System.out.println("Not Found :" + scanner.next());
    }

    scanner.close();
}

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    // Write output to a file.
    FileWriter fout = new FileWriter("test.txt");
    fout.write("int: 1  double 1.0  boolean true");
    fout.close();//from  w  ww  . j  a  v  a 2 s  .com

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

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            System.out.println("int: " + src.nextInt());
        } else if (src.hasNextDouble()) {
            System.out.println("double: " + src.nextDouble());
        } else if (src.hasNextBoolean()) {
            System.out.println("boolean: " + src.nextBoolean());
        } else {
            System.out.println(src.next());
        }
    }
    fin.close();
}

From source file:Main.java

public static void main(String[] args) {
    String content = " <2008-10-07> hi <test>" + "   <2008-11-26>  user <test>" + "   <2008-11-28><aaaa>  ";
    Scanner sc = new Scanner(content).useDelimiter("\\s*[<>]\\s*");
    while (sc.hasNext()) {
        System.out.printf("[%s|%s|%s]%n", sc.next(), sc.next(), sc.next());
        if (sc.hasNext())
            sc.next();/*from  w  ww  .j a  v  a  2  s .  c om*/
    }
}

From source file:ScanMixed.java

public static void main(String args[]) throws IOException {
    int i;/* w ww  .  j  av a  2  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:SetTest.java

public static void main(String[] args) {
    Set<String> words = new HashSet<String>(); // HashSet implements Set
    long totalTime = 0;

    Scanner in = new Scanner(System.in);
    while (in.hasNext()) {
        String word = in.next();// w w  w .  j ava 2  s  .  com
        long callTime = System.currentTimeMillis();
        words.add(word);
        callTime = System.currentTimeMillis() - callTime;
        totalTime += callTime;
    }

    Iterator<String> iter = words.iterator();
    for (int i = 1; i <= 20 && iter.hasNext(); i++)
        System.out.println(iter.next());
    System.out.println(". . .");
    System.out.println(words.size() + " distinct words. " + totalTime + " milliseconds.");
}

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 w  ww  .j av a  2s . c  o m*/

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

    Scanner src = new Scanner(fin);

    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:LogTest.java

public static void main(String[] args) throws IOException {
    String inputfile = args[0];//from w w  w.j  a  v a 2  s  . c  o  m
    String outputfile = args[1];

    Map<String, Integer> map = new TreeMap<String, Integer>();

    Scanner scanner = new Scanner(new File(inputfile));
    while (scanner.hasNext()) {
        String word = scanner.next();
        Integer count = map.get(word);
        count = (count == null ? 1 : count + 1);
        map.put(word, count);
    }
    scanner.close();

    List<String> keys = new ArrayList<String>(map.keySet());
    Collections.sort(keys);

    PrintWriter out = new PrintWriter(new FileWriter(outputfile));
    for (String key : keys)
        out.println(key + " : " + map.get(key));
    out.close();
}

From source file:Main.java

public static void main(String[] args) {
    String s = "java2s.com 1 + 1 = 2.0 ";

    Scanner scanner = new Scanner(s);

    scanner.useLocale(Locale.US);

    while (scanner.hasNext()) {
        // check if the scanner's next token is a short with a radix 4
        System.out.println(scanner.hasNextShort(4));

        System.out.println(scanner.next());
    }//w  w  w  .ja  va2s.  c  o  m

    scanner.close();
}

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    // Write output to a file.
    FileWriter fout = new FileWriter("test.txt");
    fout.write("2 3.4 5 6 7.4 9.1 10.5 done");
    fout.close();/*from w w  w  . j ava2  s  .  c om*/

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

    Scanner src = new Scanner(fin);

    // Read and sum numbers.
    while (src.hasNext()) {
        if (src.hasNextDouble()) {
            System.out.println(src.nextDouble());
        } else {
            break;
        }
    }
    fin.close();
}

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    int i;//from   w  w  w .ja  v  a 2s.c om
    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();
}