Description Johan Compagner 2005-02-08 06:24:44 EST

In my build of eclipse: I20050201-0800 i have this test file:

public class Test
{
	public Test()
	{
		super();
	}

	public Object convert(Object value)
	{
		Double d = (Double)value;
		d = (d/100);
		return d;
	}

	public static void main(String[] args)
	{
		Test test = new Test();
		Object value = test.convert(new Double(50));
	}
}

eclipse generates the wrong byte code for that:

5:   aload_2
6:   invokevirtual   #21; //Method java/lang/Double.doubleValue:()D
9:   ldc2_w  #22; //double 100.0d
12:  ddiv
13:  invokevirtual   #21; //Method java/lang/Double.doubleValue:()D
16:  astore_2

javac:

   5:   aload_2
   6:   invokevirtual   #3; //Method java/lang/Double.doubleValue:()D
   9:   ldc2_w  #4; //double 100.0d
   12:  ddiv
   13:  invokestatic    #6; //Method java/lang/Double.valueOf:(D)Ljava/lang/Double;
   16:  astore_2

and that is logical because the double must be converted to a Double again and
that shouldn't be done with a doubleValue() method (that a double doesn't have)