Sorting Element of list using Comparable interface

  Here is an Example to sort list of added objects to an array list using Comparable  interface.
  import java.util.ArrayList;
    import java.util.Collections;

    public class Sort1 implements Comparable<Object>
    {
    int age;
    String name;
    Sort1(int age,String name)
    {
        this.age=age;
        this.name=name;
    }
    public String toString()
    {
        return "age:" +age+" "+ "name:" +name;
    }
    public int compareTo(Object o)
    {
        return ((Sort1)o).age-age;
    }
    public static void main(String[] args)
    {
        ArrayList<Sort1> list=new ArrayList<Sort1>();
        list.add(new Sort1(60,"byz"));
        list.add(new Sort1(10,"xbc"));
        list.add(new Sort1(20,"ahaitu"));
        Collections.sort(list);
        System.out.println(list);
      
      
    }
    }