Question

java集合的怎么得到的长度是3啊

import java.util.*;class e{ int x; public e(int x){ this.x=x;} public int hashCode(){ return this.x;} public boolean equals(e ee){ if(ee.hashCode()==this.hashCode()){ return true;}else{ return false;} } }class ee{ public static void main(String args[]){ HashSet ee=new HashSet(); ee.add(new e(1)); ee.add(new e(2)); e s=new e(1); System.out.println(new e(1).equals(s)); System.out.println(ee.add(s)); System.out.println(ee.size()); Iterator b=ee.iterator(); while(b.hasNext()){ e eee=(e)(b.next()); System.out.println(eee); }}}为什么集合会有3个啊

Answer 1

ee.add(new e(1));
ee.add(new e(2));
System.out.println(ee.add(s));
加了三个