Java.util.Scanner.next() Method

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Description

The java.util.Scanner.next(Pattern pattern) method Returns the next token if it matches the specified pattern. This method may block while waiting for input to scan, even if a previous invocation of hasNext(Pattern) returned true. If the match is successful, the scanner advances past the input that matched the pattern.

Declaration

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

public String next(Pattern pattern)

Parameters

pattern − the pattern to scan for

Return Value

This method returns the next token

Exception

• NoSuchElementException − if no more tokens are available

• IllegalStateException − if this scanner is closed

Example

The following example shows the usage of java.util.Scanner.next() method.

package com.tutorialspoint;

import java.util.*;
import java.util.regex.Pattern;

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

      String s = "Hello World! 3 + 3.0 = 6 ";

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

      // check if next token matches the pattern and print it
      System.out.println("" + scanner.next(Pattern.compile("..llo")));

      // check if next token matches the pattern and print it
      System.out.println("" + scanner.next(Pattern.compile("..rld!")));

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

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

Hello
World!