java：Object对象进行排序

package arrays.compara;
import java.util.Arrays;
public class Student {
 public static void main(String[] args) {
  Stu[] stus = new Stu[]{
    new Stu(156,34,"ad"),
    new Stu(153,24,"cc"),
    new Stu(126,37,"ab"),
    new Stu(176,45,"as"),
    new Stu(156,34,"bd")
  };
  Arrays.sort(stus);
  for (int i = 0; i < stus.length; i++) {
   System.out.println(stus[i].toString());
  }
 }
}
class Stu implements Comparable<Object> {
 int hight;
 int age;
 String name;
 public Stu(int hight, int age, String name) {
  this.hight = hight;
  this.age = age;
  this.name = name;
 }
 //年龄比较
 /*public int compareTo(Object obj) {
  return (this.age > ((Stu)obj).age) ? 1 : (this.age == ((Stu)obj).age) ? 0 : -1;
 }*/
 //身高比较
 /*public int compareTo(Object obj) {
  return (this.hight > ((Stu)obj).hight) ? 1 : (this.hight == ((Stu)obj).hight) ? 0 : -1;
 }*/
 //姓名比较
 public int compareTo(Object obj) {
  return this.name.compareTo(((Stu)obj).name);
 }
 //重写toString()方法
 @Override
 public String toString() {
  return this.hight+"-->"+this.age+"-->"+this.name;
 }
 
}