JAVA双色球常规写法

package basic.Lianxi;

import java.util.Random;
import java.util.Arrays;

public class PoolDemo {
  public static void main(String[] args) {
    System.out.println(Arrays.toString(gen()));
  }

  public static String[] gen() {
    String pool[] = { "01", "02", "03", "04", "05", "06", "07", "08", "09",
        "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21",
        "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33" };
    boolean[] used=new boolean[pool.length];
    Random r=new Random();
    String[] bool=new String[6];
    int i=0;
    while(true){
      int index=r.nextInt(pool.length);
      if(used[index])
        continue;
      bool[i++]=pool[index];
      used[index]=true;
      if(i==bool.length)
        break;
    }
    Arrays.sort(bool);
    bool=Arrays.copyOf(bool, bool.length+1);
    bool[bool.length-1]=pool[r.nextInt(16)];
    return bool;
  }
}