Can scanner be used to read a text file in Java?

Can scanner be used to read a text file in Java?

From Java 5 onwards java. util. Scanner class can be used to read file in Java.

Which method of Scanner class is used to read complete file of input?

Example- File Object Create a Scanner class by passing the above created file object. The hasNext() verifies whether the file has another line and the nextLine() method reads and returns the next line in the file. Using these methods read the contents of the file.

How do you scan a line by line in Java?

To read the line and move on, we should use the nextLine() method. This method advances the scanner past the current line and returns the input that wasn’t reached initially. This method returns the rest of the current line, excluding any line separator at the end of the line.

What does NoSuchElementException mean in Java?

The NoSuchElementException in Java is thrown when one tries to access an iterable beyond its maximum limit. The exception indicates that there are no more elements remaining to iterate over ​in an enumeration.

How do you read a string from a file in Java?

Java read file to String using BufferedReader BufferedReader reader = new BufferedReader(new FileReader(fileName)); StringBuilder stringBuilder = new StringBuilder(); String line = null; String ls = System. getProperty(“line. separator”); while ((line = reader. readLine()) !=

How do I scan a csv file in Java?

Example

1. import java.io.*;
2. import java.util.Scanner;
3. public class ReadCSVExample1.
4. {
5. public static void main(String[] args) throws Exception.
6. {
7. //parsing a CSV file into Scanner class constructor.
8. Scanner sc = new Scanner(new File(“F:\\CSVDemo.csv”));

How do you read an entire string in Java?

Learn to read a text file into String in Java….Java Read File to String

1. Files. readString() – Java 11.
2. Files. lines() – Java 8.
3. Files. readAllBytes() – Read the entire File into String – Java 7.
4. BufferedReader – Java 6 and Below. If you are still not using Java 7 or later, then use BufferedReader class.

How do you read a new line in Java?

To read data and move on to the next line, we should use the nextLine() method. This method moves the scanner past the current line and returns the rest of the current line, excluding any line separator at the end. The read position is then set to the beginning of the next line.

How do I get NoSuchElementException?

Cause for NosuchElementException If you call the nextElement() method of the Enumeration class on an empty enumeration object or, if the current position is at the end of the Enumeration, a NosuchElementException is generated at run time.

How do I get Java Util NoSuchElementException?

Example of NoSuchElementException

1. import java.util.HashSet;
2. import java.util.Hashtable;
3. import java.util.Set;
4. public class NoSuchElementException {
5. public static void main(String[] args) {
6. Set exampleleSet = new HashSet();
7. Hashtable exampleTable = new Hashtable();

How do I read a string from a file?

Below is the code snippet to read the file to String using BufferedReader. BufferedReader reader = new BufferedReader(new FileReader(fileName)); StringBuilder stringBuilder = new StringBuilder(); String line = null; String ls = System. getProperty(“line. separator”); while ((line = reader.

How to get the nosuchelementexception if there is no element?

If there is no element in the Map object, then the above code will return NoSuchElementException. Make sure to call hasNext () first. Looks like your file.next () line in the while loop is throwing the NoSuchElementException since the scanner reached the end of file. Read the next () java API here

Why is the while loop throwing a nosuchelementexception?

Looks like your file.next () line in the while loop is throwing the NoSuchElementException since the scanner reached the end of file. Read the next () java API here Also you should not call next () in the loop and also in the while condition.

How to create a private scanner in Java?

You should create a class that keeps a Scanner as private using Singleton Pattern, that makes that scanner unique on your code. Then you can implement the methods you need or you can create a getScanner ( not recommended ) and you can control it with a private boolean, something like alreadyClosed.