单选题
以下代码的执行结果是？ class RectObject { public int x; public int y; public RectObject(int x, int y) { this.x = x; this.y = y; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; final RectObject other = (RectObject) obj; if (x != other.x) { return false; } if (y != other.y) { return false; } return true; } } public class Example { public static void main(String[] args) { HashSet<RectObject> set = new HashSet<RectObject>(); RectObject r1 = new RectObject(3, 3); RectObject r2 = new RectObject(5, 5); RectObject r3 = new RectObject(3, 3); set.add(r1); set.add(r2); set.add(r3); set.add(r1); System.out.println("size:" + set.size()); } }
发布于 2020-12-25 22:05:53
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