package code;
import java.util.HashSet;
import java.util.Iterator;
class R{
int count;
public R(int count){
this.count = count;
}
public String toString(){
return "R["+count+"]";
}
public boolean equals(Object obj){
if(this == obj){
return true;
}
else{
if(obj!=null&&obj.getClass()==R.class){
R r = (R)obj;
return r==this;
}
return false;
}
}
public int hashCode(){
return count;
}
}
public class HashSetTest{
public static void main(String[] args) {
HashSet