퀴즈
다음 코드의 출력은? class Point { int x, y; Point(int x, int y) { this.x = x; this.y = y; } @Override public boolean equals(Object o) { if (!(o instanceof Point p)) return false; return x == p.x && y == p.y; } } Set<Point> set = new HashSet<>(); set.add(new Point(1, 2)); System.out.println(set.contains(new Point(1, 2)));