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Showing content from https://www.tutorialspoint.com/java/util/scanner_uselocale.htm below:

Java Scanner useLocale() Method

The Java Scanner useLocale(Locale locale) method sets this scanner's locale to the specified locale.

Following is the declaration for java.util.Scanner.useLocale() method

public Scanner useLocale(Locale locale)

locale − A string specifying the locale to use

This method returns this scanner

NA

The following example shows the usage of Java Scanner useLocale(Locale locale) method to use a locale for scanner. We've created a scanner object using a given string. We've printed a line using nextLine() method and then set a locale to print it. Then scanner is closed using close() method.

package com.tutorialspoint;

import java.util.Scanner;
import java.util.Locale;
import java.util.regex.Pattern;

public class ScannerDemo {
   public static void main(String[] args) {

      String s = "Hello World! 3 + 3.0 = 6.0 true ";

      // create a new scanner with the specified String Object
      Scanner scanner = new Scanner(s);

      // print a line of the scanner
      System.out.println(scanner.nextLine());

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

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

      // close the scanner
      scanner.close();
   }
}

Let us compile and run the above program, this will produce the following result −

Hello World! 3 + 3.0 = 6.0 true 
en

The following example shows the usage of Java Scanner useLocale(Locale locale) method to use a locale of scanner. We've created a scanner object using System.in class. We've printed a line using nextLine() method and then set a locale to print it. Then scanner is closed using close() method.

package com.tutorialspoint;

import java.util.Locale;
import java.util.Scanner;

public class ScannerDemo {
   public static void main(String[] args) {

      // create a new scanner with the System.in class
      Scanner scanner = new Scanner(System.in);

      // print a line of the scanner
      System.out.println(scanner.nextLine());

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

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

      // close the scanner
      scanner.close();
   }
}

Let us compile and run the above program, this will produce the following result −

Hello World
Hello World
en

The following example shows the usage of Java Scanner useLocale(Locale locale) method to set a locale for scanner. We've created a scanner object using properties.txt file. We've printed a line using nextLine() method and then set a locale to print it. Then scanner is closed using close() method.

package com.tutorialspoint;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Locale;
import java.util.Scanner;

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

      // create a new scanner with a file as input
      Scanner scanner = new Scanner(new File("properties.txt"));

      // print a line of the scanner
      System.out.println(scanner.nextLine());

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

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

      // close the scanner
      scanner.close();
   }
}

Assuming we have a file properties.txt available in your CLASSPATH, with the following content. This file will be used as an input for our example program −

Hello World! 3 + 3.0 = 6

Let us compile and run the above program, this will produce the following result −

Hello World! 3 + 3.0 = 6
en

java_util_scanner.htm

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