El método reset() de la clase java.util.Scanner restablece este escáner. Al reiniciar un analizador, descarta toda su información de estado explícita que puede haber sido modificada por invocaciones de useDelimiter(java.util.regex.Pattern), useLocale(java.util.Locale) o useRadix(int).
Sintaxis:
public Scanner reset()
Valor de retorno: esta función devuelve este escáner que se ha reiniciado.
Los siguientes programas ilustran la función anterior:
Programa 1:
// Java program to illustrate the
// reset() method of Scanner class in Java
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
String s = "Geeksforgeeks has Scanner Class Methods";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
// print a line of the scanner
System.out.println("Scanner String:\n"
+ scanner.nextLine());
// change the locale of this scanner
scanner.useLocale(Locale.US);
// change the radix of this scanner
scanner.useRadix(30);
System.out.println("\nBefore Reset:\n");
// print the values before reset
System.out.println("Radix: " + scanner.radix());
System.out.println("Locale: " + scanner.locale());
// reset
scanner.reset();
System.out.println("\nAfter Reset:\n");
System.out.println("Radix: " + scanner.radix());
System.out.println("Locale: " + scanner.locale());
// close the scanner
scanner.close();
}
}
Producción:
Scanner String: Geeksforgeeks has Scanner Class Methods Before Reset: Radix: 30 Locale: en_US After Reset: Radix: 10 Locale: en_US
Programa 2:
// Java program to illustrate the
// reset() method of Scanner class in Java
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
String s = "Geeksforgeeks";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
// print a line of the scanner
System.out.println("Scanner String:\n"
+ scanner.nextLine());
// change the locale of this scanner
scanner.useLocale(Locale.US);
// change the radix of this scanner
scanner.useRadix(12);
System.out.println("\nBefore Reset:\n");
// print the values before reset
System.out.println("Radix: " + scanner.radix());
System.out.println("Locale: " + scanner.locale());
// reset
scanner.reset();
System.out.println("\nAfter Reset:\n");
System.out.println("Radix: " + scanner.radix());
System.out.println("Locale: " + scanner.locale());
// close the scanner
scanner.close();
}
}
Producción:
Scanner String: Geeksforgeeks Before Reset: Radix: 12 Locale: en_US After Reset: Radix: 10 Locale: en_US
Referencia: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#reset()