How to remove duplicate objects in a List without equals/hashcode?

Question

I have to remove duplicated objects in a List. It is a List from the object Blog that looks like this:

public class Blog {
    private String title;
    priv         


        

Answer 1

We can also use Comparator to check duplicate elements. Sample code is given below,

private boolean checkDuplicate(List studentDTOs){

    Comparator studentCmp = ( obj1,  obj2)
            ->{
        if(obj1.getName().equalsIgnoreCase(obj2.getName())
                && obj1.getAddress().equalsIgnoreCase(obj2.getAddress())
                && obj1.getDateOfBrith().equals(obj2.getDateOfBrith())) {
            return 0;
        }
        return 1;
    };
    Set setObj = new TreeSet<>(studentCmp);
    setObj.addAll(studentDTOs);
    return setObj.size()==studentDTOs.size();
}