(Java) How to sort this array of objects?

Question

Java

How to sort the given List array by the id string, so that the object with id=true comes first, and after false. Or is it unrealistic?

public class Met {
    public static void main(String[] args){

        Object[] List = {
            new Student(),
            new Schoolboy()
        };

    }

    public static class Student{
       private boolean id=true;
        public boolean isId() {
            return id;
        }
    }

    public static class Schoolboy{
        private boolean id=false;
        public boolean isId() {
            return id;
        }

    }
}

Answer 1

Call Collections.sort() and pass the required comparator there

Answer 2

Read the basics, and not even java in particular.