both list store user objects, including id and name, how to filter the intersection based on the same id of the current object without rewriting hashcode and equals?
both list store user objects, including id and name, how to filter the intersection based on the same id of the current object without rewriting hashcode and equals?
consider writing an auxiliary function
int find(int id, List<User> list){
int res = -1;
for(int i = 0; i < list.size(); i PP){
if (list.get(i).id == id){
res = i;
break;
}
}
return res;
}then use stream to simplify operations
List<User> list = list2.stream()
.filter(user -> find(user.id, list1) > -1)
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