To use the Scanner class, create an object of the class and use any of the available methods found in the Scanner class documentation. In our example, we will use the nextLine() method, which is used to read Strings: import java.util.Scanner; ...

clear() clone() compute() computeIfAbsent() computeIfPresent() containsKey() containsValue() entrySet() forEach() get() getOrDefault() isEmpty() keySet() merge() put() putAll() putIfAbsent() remove() replace() replaceAll() size() values() Java ...

The following exercises shall introduce you to Scanner which is used to get input from the user. Please do the following exercises. Feel free to discuss your solutions with your neighbours. Write the things you found out down to share them later with the class. import java.util.Scanner; public class ScannerExperiments { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("What is your name?"); String name = input.nextLine(); System.out.println("It's me, " + name + "!"); } }

import java.util.Random; import java.util.Scanner; public class RandomPoint { public static void main(String[] args) { // used to generate random numbers.. Random random = new Random(); // used to collect input from user.. Scanner scanner = new Scanner(System.in); System.out.println("minimum x ?

The Scanner class of the java.util package is used to read input data from different sources like input streams, users, files, etc. In this tutorial, we will learn about the Java Scanner and its methods with the help of examples.

Improve your Java skills with our interactive Scanner input challenge. Learn to read user data, use variables, and create dynamic console outputs in this beginner-friendly Java programming exercise.

The more you practice, the more intuitive Scanner will become. So put your knowledge to the test and start coding 😁. Remember, if you want to fast-track your Java knowledge and get as much hands-on practice as possible, then check out my Java programming bootcamp: Updated for 2025, you'll learn Java programming fundamentals all the way from complete beginner to advanced skills. Better still, you’ll be able to reinforce your learning with over 80 exercises ...

January 19, 2021 - Java 8 | Scanner Class Practice Hi guys! Welcome to another java practice session with me! Following from last time, let’s keep practicing the Scanner Class! If you missed the last post, the link …

By default, a scanner uses white space to separate tokens. (White space characters include blanks, tabs, and line terminators. For the full list, refer to the documentation for Character.isWhitespace.) To see how scanning works, let's look at ScanXan, a program that reads the individual words in xanadu.txt and prints them out, one per line. import java.io.*; import java.util.Scanner; public class ScanXan { public static void main(String[] args) throws IOException { Scanner s = null; try { s = new Scanner(new BufferedReader(new FileReader("xanadu.txt"))); while (s.hasNext()) { System.out.println(s.next()); } } finally { if (s != null) { s.close(); } } } }

On line 8 we ask the Scanner object named keyboard to do something for us. We say “Keyboard, run your next() function.” The Scanner object will pause the program and wait for the human to type something.

This resource offers a total of 5356 Java Programming problems for practice. It includes 1129 main exercises, each accompanied by solutions, detailed explanations, and 4 to 5 related problems.

Java Examples Java Compiler Java ... Q&A Java Certificate ... // Create a scanner object Scanner myObj = new Scanner("A string to scan"); // Output the next token System.out.println(myObj.next());...

April 1, 2025 - As the name is a string, the Scanner object uses the next () method. For class input, it uses nextInt () while for percentage it uses nextFloat (). In this manner, you can easily segregate the input while reading. The output of the program shows the input being entered and the information displayed. import java.util.*; public class Main{ public static void main(String []args){ String name; int myclass; float percentage; //creating object of Scanner class Scanner input = new Scanner(System.in); System.out.print("Enter your name: "); name = input.next(); System.out.print("Enter your class: "); myclass = input.nextInt(); System.out.print("Enter your percentage: "); percentage = input.nextFloat(); input.close(); System.out.println("Name: " + name + ", Class: "+ myclass + ", Percentage: "+ percentage); } }

This tutorial on how to use the Java Scanner for user input will quickly show you how to import java.util, take String, int, double and char input, and teach you the difference between the ...

import java.util.Scanner; public class GreetingWithScanner { public static void main(String[] args) { Scanner stdin = new Scanner( System.in ); String usersName; // The user's name, as entered by the user. String upperCaseName; // The user's name, converted to upper case letters.

Java Examples Java Compiler Java Exercises Java Quiz Java Server Java Syllabus Java Study Plan Java Certificate ... // Create a scanner object Scanner myObj = new Scanner("Please send an email to [email protected] for more details."); // Get the email address with a pattern String email = myObj.findWithinHorizon("[a-zA-Z]+@[a-zA-Z]+.[a-zA-Z]{2,}", 0); // Show the email if found if (email != null) { System.out.println(email); } else { System.out.println("No email found"); }

// Create a scanner object Scanner myObj = new Scanner("An int is a number between -2,147,483,648 and 2,147,483,647"); // Print the value of every int in the scanner while(myObj.hasNext()) { if(myObj.hasNextInt()) { System.out.println(myObj.nextInt()); } else { myObj.next(); } }...

Java Examples Java Compiler Java Exercises Java Quiz Java Server Java Syllabus Java Study Plan Java Interview Q&A Java Certificate ... import java.io.File; // Import the File class import java.io.FileNotFoundException; // Import this class to handle errors import java.util.Scanner; // Import the Scanner class to read text files public class ReadFile { public static void main(String[] args) { try { File myObj = new File("filename.txt"); Scanner myReader = new Scanner(myObj); while (myReader.hasNextLine()) { String data = myReader.nextLine(); System.out.println(data); } myReader.close(); } catch (FileNotFoundException e) { System.out.println("An error occurred."); e.printStackTrace(); } } } Run Example »