The document discusses the Scanner class in Java, which is used to get user input from the keyboard. It describes several methods of the Scanner class like nextInt(), nextFloat(), and nextLine() that can be used to read integer, float, and string values from the user. An example program is given that uses the Scanner class to take integer, float, and string inputs from the user and display them.

1. JAVA Programming :
Scanner class
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Handled By
Prof .Wrushabh Sirsat
Associate Professor
Department of IT

2. User Input
 The Scanner class is used to get user
input, and it is found in
the java.util package.
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3. Scanner class Methods
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Method Description
nextBoolean() Reads a boolean value from the user
nextByte() Reads a byte value from the user
nextDouble() Reads a double value from the user
nextFloat() Reads a float value from the user
nextInt() Reads a int value from the user
nextLine()
next()
Reads a String value from the user
nextLong() Reads a long value from the user
nextShort() Reads a short value from the user

4. Example:
Class sample
{
Public static
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5. Strings
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 The String data type is used to store a
sequence of characters (text).
 String values must be surrounded by
double quotes:
Example
 String greeting = "Hello World";
System.out.println(greeting);

6. Example:
Class sample
{
Public static
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7. import java.util.Scanner;
class GetInputData
{
public static void main(String args[])
{
int num;
float fnum;
String str;
Scanner in = new Scanner(System.in);
//Get input String
System.out.println("Enter a string: ");
str = in.nextLine();
System.out.println("Input String is: "+str);
//Get input Integer
System.out.println("Enter an integer: ");
num = in.nextInt();
System.out.println("Input Integer is: "+num);
//Get input float number
System.out.println("Enter a float number: ");
fnum = in.nextFloat();
System.out.println("Input Float number is: "+fnum);
}
}
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