public class Test1{

public static void main(String[] args){

Student s1 = new Student("z3", 23, 180);

Student s2 = new Student("z4", 26, 190);

int c = s1.compareTo(s2);

System.out.println(c);

}

}

class Student implements Comparable{

private String name;

private int age;

private double height;

public void setName(String name){

this.name = name;

}

public String getName(){

return name;

}

public void setAge(int age){

this.age = age;

}

public int getAge(){

return age;

}

public void setHeight(double height){

this.height = height;

}

public double getHeight(){

return height;

}

public Student(String name, int age, double height){

this.name = name;

this.age = age;

this.height = height;

}

public Student(){}

@Override

public int compareTo(Object o){

Student other = (Student)o;

//return this.getAge() - other.getAge();

return this.getName().compareTo(other.getName());

}

}