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The Rational class seems to be missing an equals() method definition, which is being used in the equals method of Line.
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I don’t understand this code:
Set s1 = table.get(l);
if (s1 == null) {
s1 = new HashSet<>();
table.put(l, s1);
}
s1.add(P.get(i));Set<Point> s2 = table.get(l); if (s2 == null) { s2 = new HashSet<>(); table.put(l, s2); }
s2.add(P.get(j));
Why are two sets getting created? Don’t we just need one and add both points to it?