"以下代码执行结果是?class RectObject {public int x;public int y;public RectObject(int x, int y) {this.x = x;this.y = y;}@Overridepublic int hashCode() {// TODO Auto-generated method stubreturn (int)System.nanoTime();}@Overridepublic boolean equals(Object obj) {return false;}}public class Example {public static void main(String[] args) {HashSet set = new HashSet();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());}}"
发布时间:2024-03-31 20:53:20