Java TreeSet 添加失败的解决

public static void demo() {
    TreeSet<Person> ts = new TreeSet<>();
    ts.add(new Person("张三", 23));
    ts.add(new Person("李四", 13));
    ts.add(new Person("周七", 13));
    ts.add(new Person("王五", 43));
    ts.add(new Person("赵六", 33));
    System.out.println(ts);
  }

public class TreeEntity implements Comparable<Object> {
    @JsonProperty(value = "Name")
    private String name = "";

    /**
     * 名称(字段名）
     * 
     */
    public final String getName() {
      return name;
    }

    public final void setName(String value) {
      name = value;
    }

    @JsonProperty(value = "Header")
    private String header = "";

    /**
     * 显示的名称（字段别名）
     */
    public final String getHeader() {
      if (header.isEmpty()) {
        header = name;
      }
      return header;
    }

    public final void setHeader(String value) {
      header = value;
    }

    @Setter(AccessLevel.PROTECTED)
    @JsonProperty(value = "Childrens")
    private TreeSet<TreeEntity> childrens;

    /**
     * 子节点集合
     * 
     */
    public final TreeSet<TreeEntity> getChildrens() {
      return childrens;
    }

    public final void setChildrens(TreeSet<TreeEntity> value) {
      childrens = value;
    }

    @Override
    public int compareTo(Object o) {
      TreeEntity te = (TreeEntity) o;
      if (te == null)
        return 1;
      return this.getName().compareTo(te.getName());
    }

    /**
     * 构造函数
     */
    public TreeEntity() {
      childrens = new TreeSet<TreeEntity>();
    }
  }
  }
}

package test20160302;
import java.util.TreeSet;
class R implements Comparable<Object>{
  int count;
  public R(int count){
    this.count = count;
    System.out.println("count:"+count);
  }
  public String toString(){
    return "R[count:"+this.count+"]";
  }
  public boolean equals(Object obj){
    if(this == obj)return true;
    if(obj!=null && obj.getClass()==R.class){
      return this.count == ((R)obj).count;
    }else
      return false;
  }

  public int compareTo(Object obj){
    R r = (R)obj;
    System.out.println("用来比较的数："+this.count);
    System.out.println("被比较的数："+r.count);
    return this.count<r.count?-1:this.count>1?1:0;
  }
}

public class TreeSetTest3 {
  public static void main(String[] args) {
    TreeSet ts = new TreeSet();
    ts.add(new R(-3));
    ts.add(new R(-1));
    System.out.println(ts);
  }
}