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

  1. #1
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    Default 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;
     }	
    }
    EzirhD.jpg
    http://3.imgland.net/EzirhD.png <--- Link to picture in high resolution!


  2. #2
    Super Moderator copeg's Avatar
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    Default Re: I dont know why its giving me this error with eclipse!

    There are two public classes in the same file - mark one with a different access modifier or better yet place them in their own files with the class name as the file name.

    For future reference, I'd recommend posting the error message directly to the forums rather than attaching photos. And further, if you are new to java and using an IDE, you might benefit from spending some time using the command line for development. YMMV

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