FAQ: How To Read A Line In Java?

How do you read a whole line in Java?

Example of nextLine() method

  1. import java.util.*;
  2. class UserInputDemo1.
  3. {
  4. public static void main(String[] args)
  5. {
  6. Scanner sc= new Scanner(System.in); //System.in is a standard input stream.
  7. System.out.print(“Enter a string: “);
  8. String str= sc.nextLine(); //reads string.

How do you read a string line?

You can use it just like the BufferedReader: Scanner scanner = new Scanner(myString); while (scanner. hasNextLine()) { String line = scanner. nextLine(); // process the line } scanner.

What is nextLine () in Java?

The nextLine() method of java. util. Scanner class advances this scanner past the current line and returns the input that was skipped. This function prints the rest of the current line, leaving out the line separator at the end. The next is set to after the line separator.

How do you read multiple lines on a scanner?

MultipleStringInputExample1.java

  1. import java.util.Scanner;
  2. public class MultipleStringInputExample1.
  3. {
  4. public static void main(String[] args)
  5. {
  6. Scanner sc = new Scanner(System.in);
  7. System.out.print(“Please enter the number of strings you want to enter: “);
  8. //takes an integer input.
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How do I read a file?

Here are some of the many ways of reading files:

  1. Using BufferedReader: This method reads text from a character-input stream.
  2. Using FileReader class: Convenience class for reading character files.
  3. Using Scanner class: A simple text scanner which can parse primitive types and strings using regular expressions.

What is a string line used for?

Line levels (or “string” levels) are a special brand of spirit level used for leveling across longer distances. They can be attached to a tightly pulled string to find level between two stakes in the ground to find level ground.

How do you read a line in a string in python?

The file object provides you with three methods for reading text from a text file:

  1. read() – read all text from a file into a string.
  2. readline() – read the text file line by line and return all the lines as strings.
  3. readlines() – read all the lines of the text file and return them as a list of strings.

What does scanner nextLine () do?

nextLine() method advances this scanner past the current line and returns the input that was skipped. This method returns the rest of the current line, excluding any line separator at the end. The position is set to the beginning of the next line.

What’s the difference between next () and nextLine () in a scanner?

A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace. next(): Finds and returns the next complete token from this scanner. nextLine(): Advances this scanner past the current line and returns the input that was skipped.

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Why nextLine () is not working?

What is the Issue with nextLine() method? // if the input was correctly obtained. As you can see, the nextLine() method skips the input to be read and takes the name of Mother in the place of Father. Hence the expected output does not match with the actual output.

How do I scan multiple lines in Java?

1 Answer

  1. Scanner in = new Scanner(System.in); System.out.printf(“Please specify how many lines you want to enter: “); String[] input = new String[in.nextInt()];
  2. in.nextLine(); //consuming the <enter> from input above. for (int i = 0; i < input.length; i++) {
  3. } System.out.printf(“nYour input:n”);

Can we use two scanner in Java?

The application should allow the user to enter “add” as many times as they wish but the error “no line found” appears after the add method has been invoked.

How do you read a paragraph in Java with a scanner?

Scanner file = new Scanner(new FileInputStream(“..//output. txt”)); int count = 0; while (file. hasNextLine()) { //whilst scanner has more lines Scanner s = new Scanner(file. nextLine()); if(!

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