How do you take input from user using DataInputStream class in Java explain with a code?

Example of DataInputStream class

  1. package com.javatpoint;
  2. import java.io.*;
  3. public class DataStreamExample {
  4. public static void main(String[] args) throws IOException {
  5. InputStream input = new FileInputStream(“D:\\testout.txt”);
  6. DataInputStream inst = new DataInputStream(input);
  7. int count = input.available();

What is the use of DataInputStream in Java?

Class DataInputStream. A data input stream lets an application read primitive Java data types from an underlying input stream in a machine-independent way. An application uses a data output stream to write data that can later be read by a data input stream.

How do we take input in Java?

The following example allows user to read an integer form the System.in.

  1. import java.util.*;
  2. class UserInputDemo.
  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 first number- “);
  8. int a= sc.nextInt();

What is DataInputStream read in Java?

read(byte[] b) method reads number of bytes from the contained input stream and allocate them in the buffer b. The method is blocked until input data is available, an exception is thrown or end of file is detected.

Why do we use DataInputStream?

A data input stream enables an application to read primitive Java data types from an underlying input stream in a machine-independent way(instead of raw bytes). That is why it is called DataInputStream – because it reads data (numbers) instead of just bytes.

How do I get user input String?

Example of next() method

  1. import java.util.*;
  2. class UserInputDemo2.
  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.next(); //reads string before the space.

How do you take output in Java?

Let’s take an example to output a line.

  1. class AssignmentOperator { public static void main(String[] args) { System.out.println(“Java programming is interesting.”); } }
  2. class Output { public static void main(String[] args) { System.out.println(“1.

What does readLine () method return?

The readlines method returns the entire contents of the entire file as a list of strings, where each item in the list is one line of the file. The readline method reads one line from the file and returns it as a string.

What does BR readLine () do in Java?

Java BufferedReader readLine() Method The readLine() method of Java BufferedReader class reads a line of text. The “/n” and “/r” are line termination character which is used to consider a line.

What is the difference between DataInputStream and BufferedReader?

DataInputStream consumes less amount of memory space being it is a binary stream, whereas BufferedReader consumes more memory space being it is character stream. The data to be handled is limited in DataInputStream, whereas the number of characters to be handled has wide scope in BufferedReader.

How to convert an InputStream to a file in Java?

Overview In this tutorial,We’ll learn how to convert or write an InputStream to a File. This can be done in different ways as below.

  • Using plain Java API Reading a file from a predefined location or from a memory on disk and writing the contents into a new file.
  • Java NIO Package Next,let us see the nio package solution.

    • What is data input stream in Java?

    Java – DataInputStream. The DataInputStream is used in the context of DataOutputStream and can be used to read primitives. Once you have DataInputStream object in hand, then there is a list of helper methods, which can be used to read the stream or to do other operations on the stream. Reads up to len bytes of data from the input stream into an

    How to read data from a file using FileInputStream?

    read () – reads a single byte from the file

  • read (byte[]array) – reads the bytes from the file and stores in the specified array
  • read (byte[]array,int start,int length) – reads the number of bytes equal to length from the file and stores in the specified array starting from the position

    • How to write to a file using fileoutputstream in Java?

    write (): this writes the single byte to the file output stream.

  • write (byte[]array): this writes the specified array’s bytes to the output stream.
  • write (byte[]array,int start,int length): this writes the number of bytes equal to length to the output stream from an array starting from the position start.