please provide comments for this code:

for $($String v : this.graphTwoVertices$)/*$ Converting string to graphTwoVertices$*/\{$

Set vNeighbours $=$ new HashSet$()$;

vNeighbours.addAll$($this$.$graphTwo.neighbours$($v$))$;$/*$used to accept keyword arguments$*/$

this.graphTwoAdjacencies.put$($v$,$ vNeighbours$)$;

Set vIndexNeighbours $=$ new HashSet$()$;

for $($String u : vNeighbours$)\{$

vIndexNeighbours.add$($this$.$graphTwoVertexIndices.get$($u$))$;$/*$used to accept keyword arguments$*/$

$\}$

this.graphTwoIndexAdjacencies.add$($vIndexNeighbours$)$;

$\}$

this.upperbound $=$ this.graphOne.numVertices$()*$ this.VERTEXVALUE

$+$ Math.min$($this$.$graphOne.numEdges$(),$ this.graphTwo.numEdges$())*$ this.EDGEVALUE;

this.individualSize $=$ this.graphOneVertices.size$()$;

$`$

System.out.println$("$Graph $1$: $"+$ graphOne$)$;

System.out.println$("$Graph $2$: $"+$ graphTwo$)$;

System.out.println$("$Upper bound: $"+$ this.upperbound$)$;

$\}$