Java Scanner match() Method

The match() method of Java Scanner class is used to get the match result of the last scanning operation performed by this scanner. It returns true if it find the match result, otherwise returns false.

Syntax

Following is the declaration of match() method:

Parameter

This method does not accept any parameter.

Returns

The match() method returns a match result for the last match operation.

Exceptions

IllegalStateException- This method thrown Exception if no match result is available.

Compatibility Version

Java 1.5 and above

Example 1

import java.util.Scanner;  
public class ScannerMatchExample1{  
   public static void main(String args[]){ 
	   String str = "Hello World! 123 JTP ";
	   //Create a new scanner with the specified String Object
	   Scanner scanner = new Scanner(str);
	   //Check if next token is "Hello"
	   System.out.println("Scan String True/False: "+scanner.hasNext("Hello"));
	   //Find and Print the last match
	   System.out.println("Last Match String: "+scanner.match());
	   //Print the line
	   System.out.println("" +scanner.nextLine());
	   scanner.close();
       }  
}   

Output:

Scan String True/False: true
Last Match String: [email protected]
Hello World! 123 JTP

Example 2

import java.util.Scanner;  
public class ScannerMatchExample2{  
   public static void main(String args[]){ 
	   //Initialize Scanner object
		Scanner scan = new Scanner("D A 4 1 3");			
		scan.useRadix(16);
		//Print the radix the Scanner object is using
		System.out.println("Radix:"+scan.radix());
		//Printing the tokenized Strings
		while(scan.hasNextInt()){
			scan.nextInt();
			//Printing the index where the string object has been found
			System.out.println("Pattern match at index:"+scan.match().start());
		}
		scan.close();
    }  
}   

Output:

Radix:16
Pattern match at index:0
Pattern match at index:2
Pattern match at index:4
Pattern match at index:6
Pattern match at index:8

Example 3

import java.util.*;
public class ScannerMatchExample3 {  
   public static void main(String args[]){ 
	   String s = "JavaTpoint.com 11 + 14 = 25.0 ";
	   Scanner scanner = new Scanner(s);	    
	   //find the last match and print it
	   System.out.println(scanner.match());
	   System.out.println(scanner.nextLine());
	   scanner.close();
   }
}

Output:

Exception in thread "main" java.lang.IllegalStateException: No match result available
	at java.base/java.util.Scanner.match(Scanner.java:1398)
	at myPackage.ScannerMatchExample3.main(ScannerMatchExample3.java:11)

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