Scanner class in java | Scanner class in java with example | java scanner input statement - Online help

Scanner class in java:

             A scanner class is used to enable a program to read data i.e. numbers and strings. Before using a scanner class, the program must import the package import java .util.*;.A Scanner class to create and obtain input from command window is as follows:

Scanner input=new scanner (system .in);

Methods:

The various methods of the scanner class are as follows:

1.int nextInt()

2.double nextDouble()

3.String next ()

4.string nextLine ()

5.boolean hasNext ()

6.boolean hasNextDouble

    

Methods	Description
int nextInt()	Returns an integer value. The default value for a field of type int 0.
double nextDouble()	Returns a double value. The default value for a field of type double is 0.0
String next ()	Reads individual words. i.e., The method next reads the character until a whitespace character such as space, tab or newline is encountered, then return a string. (excluding the whitespace)
string nextLine ()	Read a line of text. The methods nextLine read characters typed by the user until the newline character is encountered, then return a string(excluding the new line)
boolean hasNext ()	Determines whether there is another word in the input. The method has Next returns the Boolean value true if there is more data; otherwise, it returns false.
boolean hasNextInt	Determines whether the next character sequence represents an integer.
boolean hasNextDouble	Determine whether the next character sequence represents a floating point.

Program:

Import java .util.*;

Class Input Demo

{

Public static void main (String args [])

{

Int a, b;

double pi;

String name;

Scanner s=new Scanner (System .in);

System.out .println(“Enter the value of a & b”);

A=s .next Int ();

B=s .next Int ();

System.out.println(“Enter the value of pi”);

Pi=s .next Double();

System.out.println (“Enter the your name”);

Name=s next ();

System .out.println (“The value of a=”+a);

System.out.println (“The value of b=”+b);

System.out.println(“The value of pi=”+pi);

System.out.println(“Name=”+name);

}

}

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