Utilities 15 : Temperature converter

Yet another tool. This tool will help you to convert temperature values between Celsius, Kelvin, and Fahrenheit scales.

Java Program :

import java.io.*;
class temp_convert
{
 static void main()throws IOException
 {
     BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
     int opt;
     int t=1;
     double c;
     double i=0;
     double s=0;
     System.out.println("\t\t*****Welcome to temperature converter*****");
     while(t!=0)
     {
     System.out.println("\nPress 1 to convert degree celsius into degree fahrenheit");
     System.out.println("Press 2 to convert degree fahrenheit into degree celsius");
     System.out.println("Press 3 to convert degree celsius into kelvin temp.");
     System.out.println("Press 4 to convert degree fahrenheit into kelvin temp.");
     System.out.println("Press 5 to convert kelvin temp. into degree celsius");
     System.out.println("Press 6 to convert kelvin temp. into degree fahrenheit");
     System.out.print("\nEnter you choice : ");
     opt=Integer.parseInt(br.readLine());
     System.out.print("\n");
     switch(opt)
     {
         case 1:
         System.out.print("Enter degree celsius temp.(without the degree sign.) : ");
         c=Integer.parseInt(br.readLine());
         s=s+celsius(c);
         break;
         case 2:
         System.out.print("Enter degree fahrenheit temp.(without the degree sign.) : ");
         c=Integer.parseInt(br.readLine());
         s=s+fahr(c);
         break;
         case 3:
         System.out.print("Enter degree celsius temp.(without the degree sign.) : ");
         c=Integer.parseInt(br.readLine());
         s=s+kelvin(c);
         break;
         case 4:
         System.out.print("Enter degree fahrenheit temp.(without the degree sign.) : ");
         c=Integer.parseInt(br.readLine());
         i=i+fahr(c);
         s=s+kelvin(i);
         break;
         case 5:
         System.out.print("Enter kelvin temp. : ");
         c=Integer.parseInt(br.readLine());
         s=s+kc(c);
         break;
         case 6:
         System.out.print("Enter kelvin temp. : ");
         c=Integer.parseInt(br.readLine());
         i=i+kc(c);
         s=s+celsius(i);
         break;
         default:
         System.out.print("Invalid option\n");
        }
      if(opt==1)
      System.out.println("\nThe result is : "+s+" degree fahrenheit");
      if(opt==2)
      System.out.println("\nThe result is : "+s+" degree celsius");
      if(opt==3)
      System.out.println("\nThe result is : "+s+" kelvin");
      if(opt==4)
      System.out.println("\nThe result is : "+s+" kelvin");
      if(opt==5)
      System.out.println("\nThe result is : "+s+" degree celsius");
      if(opt==6)
      System.out.println("\nThe result is : "+s+" degree fahrenheit");
      if(opt!=1 && opt!=2 && opt!=3 && opt!=4 && opt!=5 && opt!=6)
      System.out.println("Please try again");
      s=0;
      i=0;
     System.out.println("\nEnter 1 to restart");
     System.out.println("Enter 0 to terminate the program");
     System.out.print("\nEnter yout choice : ");
     t=Integer.parseInt(br.readLine());
    }
        System.out.println("\nThank you for using this short program");
    }
    static double celsius(double d)
    {
        double w=0;
        w=((9*d)/5)+32;
        return w;
    }
    static double fahr(double e)
    {
        double x=0;
        x=((e-32)*5)/9;
        return x;
    }
    static double kelvin(double g)
    {
        double y=0;
        y=g+273;
        return y;
    }
    static double kc(double h)
    {
        double z=0;
        z=h-273;
        return z;
    }
}