Thread: I dont know why its giving me this error with eclipse!

import java.util.Scanner;
/**
   This class converts between two units.
*/
public class ConversionCalculator
{
   public static void main(String[] args)
   {
      Scanner in = new Scanner(System.in);
 
      System.out.println("Convert from:");
      String fromUnit = in.nextLine();
      System.out.println("Convert to: ");
      String toUnit = in.nextLine();
 
      UnitConverter from = new UnitConverter(fromUnit);
      UnitConverter to = new UnitConverter(toUnit);
      System.out.println("Value:");
      double val = in.nextDouble();
      double meters = from.toMeters(val);
      double converted = to.fromMeters(meters);
      System.out.println(val + " " + fromUnit + " = " + converted + " " + toUnit);
   }
}
public class UnitConverter 
{
 static double INCHES = 0.0254001;
 static double FEET = 0.3048;
 static double MILES = 1609.35;
 static double MILLIMETERS = 0.001;
 static double CENTIMETERS = 0.01;
 static double METERS = 1;
 static double KILOMETERS = 1000;
 private double val ,meters ,converted;
 String afromUnit;
 
 public UnitConverter(String fromUnit)
 {
  afromUnit = fromUnit;
 }
 
 public double toMeters(double val) 
 {
  if(afromUnit.equals("in"))
  {
   meters = (val*INCHES);
  }
  else if(afromUnit.equals("ft"))
  {
   meters = (val*FEET);
  }
  else if(afromUnit.equals("mi"))
  {
   meters = (val*MILES);
  }
  else if(afromUnit.equals("mm"))
  {
   meters = (val*MILLIMETERS);
  }
  else if(afromUnit.equals("cm"))
  {
   meters = (val*CENTIMETERS);
  }
  else if(afromUnit.equals("m"))
  {
   meters = (val*METERS);
  }
  else
  {
   meters = (val*KILOMETERS);
  }
  return meters;
 }
 
 public double fromMeters(double meters) 
 {
  if(afromUnit.equals("in"))
  {
   converted = Math.round(meters*39.369923740457715);
  }
  else if(afromUnit.equals("ft")) 
  {
   converted = Math.round(meters*3.280839895013123);
  }
  else if(afromUnit.equals("mi"))
  {
   converted = Math.round(meters*0.0006213688756330196);
  }
  else if(afromUnit.equals("mm")) 
  {
   converted = Math.round(meters*1000);
  }
  else if(afromUnit.equals("cm")) 
  {
   converted = Math.round(meters*100);
  }
  else if(afromUnit.equals("m")) 
  {
   converted = Math.round(meters*1);;
  }
  else 
  {
   converted = Math.round(meters*0.001);
  }
  return converted;
 }	
}

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