[ nice-Bugs-809381 ] overriding in Java subclass

Bugs item #809381, was opened at 2003-09-19 19:04
Message generated for change (Comment added) made by arjanb
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112788&aid=809381&group_id=12788

Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Isaac Gouy (igouy)
Assigned to: Nobody/Anonymous (nobody)
Summary: overriding in Java subclass

Initial Comment:
1) Java class Green has subclass Blue

2) Nice multiply1 adds method to Green

3) Java Exercise calls Nice multiply1

4) Adding override method to Blue in Nice multiply1 

results in a runtime error



I:\pls\Nice\test>javac test2\*.java



I:\pls\Nice\test>nicec test2

nice.lang: parsing

test2: parsing

test2: typechecking

test2: generating code

test2: linking



I:\pls\Nice\test>javac Multiple.java



I:\pls\Nice\test>java Multiple

Exception in thread "main" 

java.lang.NoClassDefFoundError: 

gnu/mapping/WrongType

        at Multiple.main(Multiple.java:9)





//------------------------------------------------

// compilation unit test\test2\Green.java



package test2;



public class Green {

   

   public Green( double value ) {

      this.value = value;

   }

   

   public double value() {

      return value;

   }

   

   public String toString() {

      return "" + value;

   }

   

   private double value;

}



//------------------------------------------------

// compilation unit test\test2\Blue.java



package test2;



public class Blue extends Green {

   

   public Blue( long lValue ) {

      super( lValue );

      this.lValue = lValue;

   }

   

   public long lValue() {

      return lValue;

   }



   public String toString() {

      return "" + lValue;

   }



   public long lValue;

}





//------------------------------------------------

// compilation unit test\test2\multiply1.nice



package test2;

import test2.*;



Green multiply1(Green this, Green other);

multiply1(this@Green, other@Green) = new Green

(this.value * other.value());





//Uncomment these lines and Multiple will have a runtime 

error

 multiply1(this@Blue, other@Blue) = new Blue(5);



//------------------------------------------------

// compilation unit test\Exercise.java

import test2.*;



public class Multiple {

   public static void main (String[] args) {

      Green x = new Green( 

3.141592653589793238462643383 );

      Green y = new Green( 1.0 );

      Green result = dispatch.multiply1(x,y);

      System.out.println(result);

   }

}

----------------------------------------------------------------------

>Comment By: Arjan Boeijink (arjanb)
Date: 2003-09-19 20:53

Message:
Logged In: YES 
user_id=688815

I don't think this is a bug. The problem here is that java can't 

find a runtime class used by nice. You should create a jar 

with nicec and use that from java.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112788&aid=809381&group_id=12788


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