It is an easy class that's wont to read a sequence of characters. it's an easy function that reads a personality another read which reads, an array of characters, and a readLine() function which reads a line.
InputStreamReader() may be a function that converts the input stream of bytes into a stream of character in order that it are often read as BufferedReader expects a stream of character.
BuffferedReader can throw checked Exceptions
// Java Program For BufferedReader Class import.java.io.*; public class BufferedReader { // Main Method public static void main(String [] args) { // Creating BufferedReader Object // InputStreamReader converts bytes to // stream of character BufferedReader BufferedReader_Name = new BufferedReader(new InputStreamReader(System.in)); // Asking for input from user System.out.println("Enter String : "); System.out.println("Enter Integer : "); // String reading internally String String_name = BufferedReader_Name.readLine(); // Integer reading internally int Integer_value = Integer.parseInt(BufferedReader_name.readLine()); // Printing String System.out.println("Entered String : "+ String_name); //Printing Integer System.out.println("Entered Integer : "+ Integer_value); } }
This is an improved version of BufferedReader added in newer versions of Java. The scanner can read formatted input. It has different functions for different types of data.
Syntax for Scanner
Scanner Scanner_name = new Scanner(System.in);
Syntax for importing Scanner Class: To use the Scanner we need to import the Scanner Class
import java.util.Scanner ;
Inbuilt Scanner functions are as follows
Hence, in the case of Integer and String in Scanner, we don’t require parsing as we did require in BufferedReader.
// Java Program to show how to take // input from user using Scanner Class import java.util.Scanner; class Scanner { public static void main( String[] args ) { // Scanner definition Scanner Scanner_name= new Scanner(System.in); // input is a string read // by readLine() function String str= str.readLine(); // print string System.out.ptintln("Entered String : "+ str); // input is an Integer // read by nextInt() function int x= Scanner_name.nextInt(); // print integer System.out.ptintln("Entered Integer : "+ x); // input is a floatingValue // read by nextFloat() function float f = Scanner_name.nextFloat(); // print floating value System.out.ptintln("Entered FloatValue : "+ f); } }