package com.raysee.Demo1;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;

/**
 * 自动点名器
 * 从N多个人员中抽取
 * 要求：
 * 70%的概率随机到男士
 * 30%的概率随机到女士
 */
public class Test1 {
  public static void main(String[] args) {

    //1.创建集合
    ArrayList<Integer> list = new ArrayList<Integer>();
    //2.添加数据
    Collections.addAll(list, 1, 1, 1, 1, 1, 1, 1);
    Collections.addAll(list, 0, 0, 0);
    //3.打乱集合中的数据
    Collections.shuffle(list);

    //4.从list集合中随机抽取0或者1
    Random r = new Random();
    int index = r.nextInt(list.size());
    Integer number = list.get(index);
    //5.创建两个集合分别存储男生和女生的名字
    ArrayList<String> boyList = new ArrayList<>();
    ArrayList<String> girlList = new ArrayList<>();
    Collections.addAll(boyList, "张无忌", "王三方", "吴双", "张晓松", "李兆强", "王力", "孙金龙", "阚说");
    Collections.addAll(girlList, "韩丽", "张娜拉", "林心如", "张柏芝", "赵艳芝");
    //6.判断此时是从boyList里面抽取还是从girlList中抽取
    if (number == 1) {
      //从boyList中抽取
      int boyIndex = r.nextInt(boyList.size());
      String boyName = boyList.get(boyIndex);
      System.out.println(boyName);
    } else {
      //从girlList中抽取
      int girlIndex = r.nextInt(girlList.size());
      String girlName = girlList.get(girlIndex);
      System.out.println(girlName);
    }
  }
}
package com.raysee.Demo1;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;

/**
 * 自动点名器
 * 从N多个人员中抽取
 * 要求：
 * 70%的概率随机到男士
 * 30%的概率随机到女士
 */
public class Test1 {
  public static void main(String[] args) {

    //1.创建集合
    ArrayList<Integer> list = new ArrayList<Integer>();
    //2.添加数据
    Collections.addAll(list, 1, 1, 1, 1, 1, 1, 1);
    Collections.addAll(list, 0, 0, 0);
    //3.打乱集合中的数据
    Collections.shuffle(list);

    //4.从list集合中随机抽取0或者1
    Random r = new Random();
    int index = r.nextInt(list.size());
    Integer number = list.get(index);
    //5.创建两个集合分别存储男生和女生的名字
    ArrayList<String> boyList = new ArrayList<>();
    ArrayList<String> girlList = new ArrayList<>();
    Collections.addAll(boyList, "张无忌", "王三方", "吴双", "张晓松", "李兆强", "王力", "孙金龙", "阚说");
    Collections.addAll(girlList, "韩丽", "张娜拉", "林心如", "张柏芝", "赵艳芝");
    //6.判断此时是从boyList里面抽取还是从girlList中抽取
    if (number == 1) {
      //从boyList中抽取
      int boyIndex = r.nextInt(boyList.size());
      String boyName = boyList.get(boyIndex);
      System.out.println(boyName);
    } else {
      //从girlList中抽取
      int girlIndex = r.nextInt(girlList.size());
      String girlName = girlList.get(girlIndex);
      System.out.println(girlName);
    }
  }
}