Can anyone debug my program?

I know I should do it by myself, but I just can't find more samples to help me. So, please help me debug my program. Thank you.

CC

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import java.io.*;

class LVDT{
public static void main(String args[]) throws IOException
{

double temperature, dest, strain;
String strD1, strD2, strD3;

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter Temperature value: ");
strD1 =  br.readLine();
temperature = Double.parseDouble(strD1);

System.out.println("------------------");
System.out.println("You can input either value of the following variable");
System.out.println("1.Dest");
System.out.println("2.Strain");

     int s = System.in.read();
     //System.out.println(s);

switch (s){
     case 49:
           System.out.println("Enter Dest value: ");
           strD2 =  br.readLine();
           dest = Double.parseDouble(strD2);

           System.out.println("Subtract Temperature from Crack value is: ");
           System.out.print( dest + ((-0.0005)* temperature) -(0.0066) );

           break;

    case 50:
           System.out.println("Enter Strain value: ");
             strD3 =  br.readLine();
             strain = Double.parseDouble(strD3);

             System.out.println("Subtract Temperature from Strain value is: ");
           System.out.print( strain - ((-3.3866)* temperature) -(8.756) );

           break;

          }
}
}