class Studentx implements Comparable<Studentx> {

    private String name;

    private int age;

    private float score;

    public Studentx(String name, int age, float score) {

        this.name = name;

        this.age = age;

        this.score = score;

    }

    public String toString() {

        return "Studentx [name=" + name + ", age=" + age + ", score=" + score

                + "]";

    }

    public int compareTo(Studentx o) {

        if (this.score > o.score) {

            return -1;

        } else if (this.score < o.score) {

            return 1;

        } else {

            if (this.age > o.age) {

                return 1;

            } else {

                return 0;

            }

        }

    }

}

public class ComparableDemo01 {

    public static void main(String[] args) {

        Studentx studentx[] = { new Studentx("von", 20, 90.0f),

                new Studentx("korea", 24, 92.0f),

                new Studentx("susan", 18, 90.0f),

                new Studentx("lily", 30, 92.0f),

                new Studentx("boy", 28, 84.2f), new Studentx("cais", 23, 97.3f) };

        java.util.Arrays.sort(studentx);

        for (int i = 0; i < studentx.length; i++) {

            System.out.println(studentx[i]);

        }

    }

}