JavaPatternMatching/examples/bajo1_usecases/Matrix1.jav

class Matrix extends Menge<Menge<Integer>> {

	mul(m){
		Menge<Menge<Integer>> ret;
		ret = new Matrix();
		i;
		i = 0;
		while(i <size()) {
			v1;
			v2;
			v1 = this.elementAt(i);
			v2 = new Menge<Integer>();
			j;
			j = 0;
			ret.addElement(v2);
			i++;
		}
		return ret;
	}
	
}