gistfile1.txt

package unit.converter;
import java.util.Scanner;
/**
 *
 * @author Nick
 */
public class UnitConverter {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
       
      Scanner in = new Scanner(System.in);

      System.out.print("Convert from: ");
      String fromUnit = in.next();
      
      System.out.print("Convert to: ");
      String toUnit = in.next();

      UnitConversions myIn = new UnitConversions(fromUnit);
      UnitConversions myOut= new UnitConversions(toUnit);

      System.out.print("What is the value you would like to convert: ");
      double inValue = in.nextFloat();
      
      double mmValue =myIn.toMM(inValue);
      double converted = myOut.toUnit(mmValue);
      

      System.out.println(inValue + " " + fromUnit + " = " + converted + " " + toUnit);
      
   }
}    

gistfile2.txt

package unit.converter;

/**
 *
 * @author Nick
 */
public class UnitConversions {
 private double inValue, mm;
 String fromUnit;
 String toUnit;
 
 public UnitConversions(String afromUnit)
{
fromUnit = afromUnit;
toUnit = afromUnit;
}
 
 public double toMM(double inValue)
 {
     if (fromUnit.equalsIgnoreCase("in"))
     {
         inValue = (inValue * 25.4);
     }
     else if(fromUnit.equalsIgnoreCase("ft"))
     {
         inValue = (inValue * 304.8);
     }
     else if (fromUnit.equalsIgnoreCase("mi"))
     {
         inValue = (inValue * 1609344);
     }    
     else if (fromUnit.equalsIgnoreCase("cm"))
     {
         inValue = (inValue * 10);
     }  
     else if (fromUnit.equalsIgnoreCase("m"))
     {
         inValue = (inValue / 1000);
     }     
     else if (fromUnit.equalsIgnoreCase("km"))
     {
         inValue = (inValue * 1000)*1000;
     }      
     else if (fromUnit.equalsIgnoreCase("mm"))
     {
         inValue = inValue;
     }
     else
     {
         System.out.println("Beginning unit not supported");
     }
       return inValue;
 }
 
 

	
  public double toUnit(double inValue)
 {
     if (toUnit.equalsIgnoreCase("in"))
     {
         inValue = (inValue / 25.4);
     }
     else if(toUnit.equalsIgnoreCase("ft"))
     {
         inValue = (inValue / 304.8);
     }
     else if (toUnit.equalsIgnoreCase("mi"))
     {
         inValue = (inValue / 1609344);
     }    
     else if (toUnit.equalsIgnoreCase("cm"))
     {
         inValue = (inValue / 10);
     }  
     else if (toUnit.equalsIgnoreCase("m"))
     {
         inValue = (inValue / 1000);
     }     
     else if (toUnit.equalsIgnoreCase("km"))
     {
         inValue = (inValue / 1000)/1000;
     }
     else if (toUnit.equalsIgnoreCase("mm"))
     {
         inValue = inValue;
     }
     else
     {
         System.out.println("Ending unit not supported. ");
     }
     
     return inValue;
     
 }
}