Example usage for java.util Scanner Scanner

Introduction

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

Prototype

public Scanner(ReadableByteChannel source)

Source Link

Document

Constructs a new Scanner that produces values scanned from the specified channel.

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);

    // skip the word that matches the pattern .com
    scanner.skip(Pattern.compile(".com"));

    System.out.println(scanner.nextLine());

    scanner.close();//  w w  w .j  a v a2s  . c om
}

From source file:Calculator.java

public static void main(String[] args) {
    System.out.println("type something like: 1+3");
    Scanner scanner = new Scanner(System.in);
    double n1 = Double.NaN;
    double n2 = Double.NaN;
    String operation = null;//w  w  w. j a va2  s .c  om

    try {
        n1 = scanner.nextDouble();
        operation = scanner.next();
        n2 = scanner.nextDouble();
        double result = calculate(n1, n2, operation);
        System.out.printf("%s %s  %s  = %.2f%n", n1, operation, n2, result);
    }

    catch (Exception e) {
        System.out.println("An invalid expression.");
    }
}

From source file:Main.java

public static void main(String[] args) {

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

    Scanner scanner = new Scanner(s);

    // find a string of world, with horizon of 10
    System.out.println(scanner.findWithinHorizon("com", 10));

    // find a string of world, with horizon of 20
    System.out.println(scanner.findWithinHorizon("=", 20));

    // print the rest of the string
    System.out.println(scanner.nextLine());

    scanner.close();//from w ww. j  a  v a  2 s  .  c  o m
}

From source file:Main.java

public static void main(String[] args) {

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

    Scanner scanner = new Scanner(s);

    // find a pattern of 2 letters before com, with horizon of 5
    System.out.println(scanner.findWithinHorizon(Pattern.compile("..com"), 5));

    // find a pattern of 2 letters before com, with horizon of 10
    System.out.println(scanner.findWithinHorizon(Pattern.compile("..com"), 10));

    // print the rest of the string
    System.out.println(scanner.nextLine());

    scanner.close();//from w w  w.ja  va 2s. c o m
}

From source file:Main.java

public static void main(String[] args) {

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

    Scanner scanner = new Scanner(s);

    // check if the scanner has a token
    System.out.println(scanner.hasNext());

    // print the rest of the string
    System.out.println(scanner.nextLine());

    // check if the scanner has a token after printing the line
    System.out.println(scanner.hasNext());

    scanner.close();//from w  ww. j a  v  a2  s  .  com
}

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);

    System.out.println(scanner.nextLine());

    // change the delimiter of this scanner
    scanner.useDelimiter(Pattern.compile(".ll."));

    // display the new delimiter
    System.out.println(scanner.delimiter());

    scanner.close();/*from w  ww . ja v a 2s  .  c om*/
}

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);

    scanner.useLocale(Locale.US);

    while (scanner.hasNext()) {

        // if the next is a double, print found and the double
        if (scanner.hasNextDouble()) {
            System.out.println("Found :" + scanner.nextDouble());
        }/*  ww  w .  j  a va 2 s. co m*/

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

    scanner.close();
}

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);

    System.out.println(scanner.nextLine());

    // change the locale of this scanner
    scanner.useLocale(Locale.US);

    // change the radix of this scanner
    scanner.useRadix(30);//from   w  w w  .java2  s.  com

    // reset and check the values for radix and locale, which are the default
    scanner.reset();
    System.out.println(scanner.radix());
    System.out.println(scanner.locale());

    scanner.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();/*  w  w  w  .  ja  v a2  s. c o m*/
    }
}

From source file:Main.java

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

    Scanner scanner = new Scanner(new FileInputStream("c:/text.txt").getChannel());

    System.out.println(scanner.nextLine());

    // change the radix of the scanner
    scanner.useRadix(32);//from   w w w.  j  av  a2  s.c om

    // display the new radix
    System.out.println(scanner.radix());

    scanner.close();
}