【Java每日一题】20161031

20161028问题解析请点击今日问题下方的“【Java每日一题】20161031”查看

 

package Oct2016;

import java.util.SortedSet;
import java.util.TreeSet;

public class Ques1031 {
   public static void main(String[] args) {
      SortedSet<People> set = new TreeSet<People>();
      set.add(new People(170));
      set.add(new People(165));
      for(People people : set){
         System.out.println("身高："+people.getHeight());
      }
      System.out.println();
      
      // 将身高矮的人变高
      set.first().setHeight(175);  //之前排在第一位的人就是最矮的
      for(People people : set){
         System.out.println("身高："+people.getHeight());
      }
   }
}
      
class People implements Comparable<People>{

   private int height;
   
   public People(int height) {
      super();
      this.height = height;
   }
   public int getHeight() {
      return height;
   }    
   public void setHeight(int height) {
      this.height = height;
   } 
   
   @Override
   public int compareTo(People p) {
      // 按身高从矮到高排序
      return height - p.height;
   }
}

 

今日问题： 
请问主程序输出结果是？（点击以下“【Java每日一题】20161031”查看20161028问题解析） 


题目原发布于公众号、简书：【Java每日一题】20161031，【Java每日一题】20161031