关于java接口的简单问题，在线等，急，谢谢谢谢

这是题目

package q;
import  java.util.Arrays;

class  Person implements Comparable<Person>  {
        private static String getHeight;
        private static  String  name;
        private  float  height;
        private static float weight;

        public  Person(String  name,  float  height,  float  weight)  {
        name = this.name;
        height = this.height;
        weight = this.weight;

        }

        public    String  getName()  {
                return  name;
        }

        public  void  setName(String  name)  {
                this.name  =  name;
        }

        public  float  getHeight()  {
                return  height;
        }

        public  void  setHeight(float  height)  {
                this.height  =  height;
        }

        public  float  getWeight()  {
                return  weight;
        }

        public  void  setWeight(float  weight)  {
                this.weight  =  weight;
        }


        public  void  speak()  {
        System.out.println("I am "+name+",my height "+height+",my weight "+weight);

        }

        public  int  compareTo(Person  o)  {
            int m = (int) (o.getWeight()*0.5+o.getHeight()*0.5);
            return m;
        }

        @Override
        public String toString() {
            return "Person [name=" + name + ",height=" + height + ",weight="+ weight + "]";


        }



}

public  class  TestCompare  {
        public  static  void  main(String[]  args)  {
                int  i;
                Person  ps[]  =  new  Person[6];
                ps[0]  =  new  Person("zhangsan",  170,  110);
                ps[1]  =  new  Person("lisi",  168,  120);
                ps[2]  =  new  Person("wangwu",  165,  115);
                ps[3]  =  new  Person("zhaoliu",  172,  121);
                ps[4]  =  new  Person("zhouqi",  160,  100);
                ps[5]  =  new  Person("zhengba",  166,  119);
                System.out.println("array  sort  before:");
                for  (i  =  0;  i  <  ps.length;  i++)  {
                        ps[i].speak();
                }

                Arrays.sort(ps); //  call  sort  method
                System.out.println("\narray  sort  after:");
                for  (i  =  0;  i  <  ps.length;  i++)  {
                        System.out.println(ps[i]);
                }
        }
}

这是我的答案

请问怎么改？谢谢谢谢

public class TestCompare {
    public static void main(String[] args) {
        int i;
        Person ps[] = new Person[6];
        ps[0] = new Person("zhangsan", 170, 110);
        ps[1] = new Person("lisi", 168, 120);
        ps[2] = new Person("wangwu", 165, 115);
        ps[3] = new Person("zhaoliu", 172, 121);
        ps[4] = new Person("zhouqi", 160, 100);
        ps[5] = new Person("zhengba", 166, 119);
        System.out.println("array  sort  before:");
        for (i = 0; i < ps.length; i++) {
            ps[i].speak();
        }

        Arrays.sort(ps); // call sort method
        System.out.println("\narray  sort  after:");
        for (i = 0; i < ps.length; i++) {
            System.out.println(ps[i]);
        }
    }
}

class Person implements Comparable<Person> {
    private String name;
    private float height;
    private float weight;

    public Person(String name, float height, float weight) {
        this.name = name;
        this.height = height;
        this.weight = weight;

    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public float getHeight() {
        return height;
    }

    public void setHeight(float height) {
        this.height = height;
    }

    public float getWeight() {
        return weight;
    }

    public void setWeight(float weight) {
        this.weight = weight;
    }

    public void speak() {
        System.out.println("I am " + name + ",my height " + height + ",my weight " + weight);

    }

    @Override
    public int compareTo(Person o) {
        int m = (int) (this.getWeight() * 0.5 + this.getHeight() * 0.5)
                - (int) (o.getWeight() * 0.5 + o.getHeight() * 0.5);
        return m;
    }

    @Override
    public String toString() {
        return "Person [name=" + name + ",height=" + height + ",weight=" + weight + "]";

    }
}

1、构造器方法有问题，是this.name=name,对this的参数进行赋值。
2、比较器有问题。