Beginning with Java

import java.util.Scanner;
class random1
{
    public static void main(String []ars)
    {
        int a;
        float b;
        String s;
       
        Scanner in=new Scanner(System.in);
        System.out.println("ENTER YOUR NAME");
        s=in.nextLine();
        System.out.println("entered name is"+s);
        System.out.println("enter the number");
        a=in.nextInt();
        System.out.println("number entered is"+a);
        System.out.println("enter the float value");
        b=in.nextFloat();
        System.out.println("entered number is"+b);
    }
}

simple java program

import java.util.Scanner;
/* We import Scanner class from java.util package for
     taking input from the keyboard*/
class temperature
{
    public static void main(String []ars)
    {
        Scanner in=new Scanner(System.in);
        System.out.println("enter temperature in fahrenheit");
        float a=in.nextFloat();
        float b=(a-32)*5/9;
        System.out.println("temperature in celsius is"+b);
    }
}