In this article, we are going to learn about Scanner class in Java and its some of the important methods (methods of Scanner class) with example. » C++ STL » Ajax » SEO » Machine learning Here, we are discussing some of the important methods of Scanner class, which are used to design a Java program with user input. There are two ways you can do this: If you only need to work with the java.util.Scanner class, you can import the Scanner class directly. So, we need to import this packet first before using the methods of Scanner class. » JavaScript The java.util.Scanner.nextBoolean()method scans the next token of the input into a boolean value and returns that value. It comes with various methods to take different types of input from users like int, float, double, long, String, etc. If the translation is successful, the scanner advances past the input that matched. » Java It is used to get the string representation of Scanner using. java.util.Scanner hasNextLine() Description : This java tutorial shows how to use the hasNextLine() method of Scanner class of java.util package. Below is a list of some of the main methods of the Scanner class. We will learn more about the classes later. » Data Structure It is used to sets this scanner's locale object to the specified locale. The virus scanners of today have great difficulty detecting malicious Java programs. skip (Pattern pattern) Skips input that matches the specified pattern, ignoring delimiters. The Scanner class can also parse strings and primitive types by using regular expressions. In this tutorial, we will learn about the Java Scanner and its methods with the help of examples. It is used to get the match result of the last scanning operation performed by this scanner. » DS It constructs a new Scanner that produces values scanned from the specified source. JavaTpoint offers too many high quality services. » Python The nextLong(radix) method of java.util.Scanner class scans the next token of the input as a long. © Copyright 2011-2018 www.javatpoint.com. » Networks Scanner class in java is found in java.util package and has a rich interface set which is needed to breakdown the input into small tokens. whenever the nextLine() method is called after anyone of the nextXXX() method then the method nextLine() does not read values from the console and it skips that step. ; The following is the code for each of the above methods: Using scanner in java java.util.Scanner is widely used for reading user input due to the ease of its object creation and the flexibility it provides when taking input. The methods are: It is used to read an integer value from the keyboard. » Content Writers of the Month, SUBSCRIBE In general, Java Scanner API looks like an iterator pattern and consists of 4 steps: break input into tokens Run-length encoding (find/print frequency of letters in a string), Sort an array of 0's, 1's and 2's in linear time complexity, Checking Anagrams (check whether two string is anagrams or not), Find the level in a binary tree with given sum K, Check whether a Binary Tree is BST (Binary Search Tree) or not, Capitalize first and last letter of each word in a line, Greedy Strategy to solve major algorithm problems. » LinkedIn The Java Scanner class breaks the input into tokens using a delimiter which is whitespace by default. It scans the next token of the input as a float. It constructs a new Scanner that produces values scanned from the specified string. It provides many methods to read and parse various primitive values. In order to work with the Scanner class, you must first import it into your code. Scanner Class Methods. Developed by JavaTpoint. Java has several predefined classes which we can use. You will see all 4 methods to do read user input from the console with simples examples and basic details, one by one. This is the Scanner class. : » DBMS It constructs a new Scanner that produces values scanned from the specified channel. The Java Scanner class provides nextXXX() methods to return the type of value such as nextInt(), nextByte(), nextShort(), next(), nextLine(), nextDouble(), nextFloat(), nextBoolean(), etc. The nextInt(radix) method of java.util.Scanner class scans the next token of the input as a Int. This method will throw InputMismatchException if the next token cannot be translated into a valid boolean value. It scans the next token of the input into a boolean value and returns that value. 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