1. Enter the character from user using InputStreamReader
//Enter the character from user using InputStreamReader
import java.io.*;
class InputStreamReaderP{
public static void main(String args[])throws Exception{
InputStreamReader r=new InputStreamReader(System.in);
BufferedReader br=new BufferedReader(r);
System.out.println("Enter your name");
String name=br.readLine();
System.out.println("Welcome "+name);
}
}
Output
2. Enter the string from user using BufferedStreamReader
import java.io.*;
class Buffered_Stream
{
public static void main ( String s[] ) throws IOException
{
System.out.print ( "Enter the string: " );
BufferedReader input = new BufferedReader ( new InputStreamReader ( System.in ) );
String inputString = input.readLine();
System.out.println ( "Entered string is: " + inputString );
}
}
Output
3. Enter the integer from user using Scanner class
//Enter the integer from the user using Scanner class
import java.util.Scanner;
class A{
public static void main(String arg[])
{
Scanner s = new Scanner(System.in);
System.out.println("Enter an integer :-");
int a = s.nextInt();
System.out.println(a);
}
}
Output
4. Enter the float from user using Scanner class
import java.util.Scanner;
class FloatInputExample {
public static void main(String[] args) {
// Create a Scanner object to read user input
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a float number: ");
// Check if the next token entered by the user is a float
if (scanner.hasNextFloat()) {
float userInput = scanner.nextFloat();
System.out.println("You entered: " + userInput);
} else {
System.out.println("Invalid input. Please enter a valid float number.");
}
// Close the Scanner to release resources
scanner.close();
}
}
Output
5. Enter the double from user using Scanner class
import java.util.Scanner;
class prog5 {
public static void main(String[] args) {
// Create a Scanner object to read input from the console
Scanner scanner = new Scanner(System.in);
// Prompt the user to enter a double
System.out.print("Enter a double: ");
// Check if the next input is a double
if (scanner.hasNextDouble()) {
// Read the double from the user
double userInput = scanner.nextDouble();
// Display the entered double
System.out.println("You entered: " + userInput);
// Check if the entered double is positive, negative, or zero
if (userInput > 0) {
System.out.println("The entered double is positive.");
} else if (userInput < 0) {
System.out.println("The entered double is negative.");
} else {
System.out.println("The entered double is zero.");
}
} else {
// If the input is not a double, display an error message
System.out.println("Invalid input. Please enter a valid double.");
}
// Close the scanner
scanner.close();
}
}
Output
6. Enter the boolean from user using Scanner class
import java.util.*;
class Boolean {
public static void main(String[] args) {
System.out.print("Are you above 18?- ");
Scanner sc = new Scanner(System.in);
boolean bn = sc.nextBoolean();
if (bn == true) {
System.out.println("You are over 18");
} else if (bn == false) {
System.out.println("You are under 18");
}
sc.close();
}
}
Output
7. Enter the short integer from user using Scanner class
import java.util.Scanner;
class a
{
public static void main(String[] x)
{
//object of the Scanner class
Scanner s=new Scanner(System.in);
System.out.print("Enter a short integer value: ");
//invoking nextShort() method that reads an integer input by keyboard
//storing the input number in a variable num
int num = s.nextShort();
System.out.println("The Short integer entered by the user is: "+num);
}
}
Output
8. Enter the long integer from user using Scanner class
import java.util.Scanner;
//Enter the long integer from user using Scanner class
class LongUsingScanner
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter a long integer : ");
long l = sc.nextLong();
System.out.println("long integer is : "+l);
}
}
Output
