Java Scanner skip() Method

The skip() is a method of Java Scanner class which skips input that matches the specified pattern, ignoring delimiters. There are two different types of Java Scanner skip() method which can be differentiated depending on its parameter. These are:

Java Scanner skip(String pattern) Method
Java Scanner skip(Pattern pattern) Method

1. Java Scanner skip(String pattern) Method

It is a Scanner class method which skips input that matches the specified pattern, ignoring delimiters.

2. Java Scanner skip(Pattern pattern) Method

It is a Scanner class method which skips input that matches a pattern constructed from the specified string.

Syntax

Following are the declarations of skip() method:

public Scanner skip(String pattern)
public Scanner skip(Pattern pattern)

Parameter

DataType	Parameter	Description	Required/Optional
String	pattern	It is a string specifying the pattern to skip.	Required
Pattern	pattern	It is the pattern to skip for specified string.	Required

Returns

The skip() method returns this Scanner object.

Exceptions

NoSuchElementException- It will thrown this Exception if the specified pattern not found.

IllegalStateException- It will thrown this Exception if the innvocation is done after Scanner is closed.

Compatibility Version

Java 1.5 and above

Example 1

import java.util.*;
import java.util.regex.Pattern;
public class ScannerSkipExample1 {  
   public static void main(String args[]){ 
	    //Initialize Scanner object
	    Scanner scan = new Scanner("Hello World! SSSIT 102 Hindi100 150 123");
	    //Skip the word that matches the specified pattern
	    scan.skip(Pattern.compile("..llo"));
	    System.out.println("Left String: " +scan.nextLine());
	    scan.close();
          }
}

Output:

Left String:  World! SSSIT 102 Hindi100 150 123

Example 2

import java.util.*;
public class ScannerSkipExample2 {  
   public static void main(String args[]){ 
	   String str = "JavaTpoint 102 131 150 123";
	   //Initialize Scanner object
	   Scanner scan = new Scanner(str);
	   //Initialize the String pattern
	   String pattern = "[a-zA-Z]*";
	   //Printing the tokenized Strings
	   while(scan.hasNext()){
		   //Skipping first occurrence of the Pattern
		   scan.skip(pattern);
		   System.out.println(scan.next());
	   }
	   scan.close();
    }
}

Output:

Example 3

import java.util.*;
public class ScannerSkipExample3 {  
   public static void main(String args[]){ 
	    //Initialize Scanner object
	    Scanner scan = new Scanner("JavaTpoint SSSIT 102 Hindi100 150 123");	
	    scan.skip("JavaTpoint");
	    System.out.println(scan.nextLine());
	    scan.close();
          }
}

Output:

SSSIT 102 Hindi100 150 123

Example 4

import java.util.*;  
public class ScannerSkipExample4 {  
     public static void main(String args[]) { 
    	      //Initialize Scanner object
 		Scanner scan = new Scanner("22 313 45 87");
 		//Intialize the String pattern
 		String pattern = "565";
 		//Print the tokenized Strings
 		while(scan.hasNext()){
 			scan.skip(pattern);
 			System.out.println("tokenized Strings: "+scan.next());
 		}
 		scan.close();
            }  
} 

Output:

Exception in thread "main" java.util.NoSuchElementException
	at java.base/java.util.Scanner.skip(Scanner.java:1843)
	at java.base/java.util.Scanner.skip(Scanner.java:1860)
	at myPackage.ScannerSkipExample4.main(ScannerSkipExample4.java:11)

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