双色球预测完美Java代码
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package org.tarena.day05;
import java.util.Arrays;
import java.util.Random;
public class Double {
public static void main(String[] args) {
// TODO Auto-generated method stub
String balls[] = {"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","3 3"};
//定义一个boolean类型数组b，其中全部的balls.length个元素都默认是false
boolean[] b = new boolean[balls.length];
String [] redBalls = new String[6];
Random r = new Random();
int i = 0;
while(true){
//nextInt(n)它是生成一个随机的int值，范围是从0（包括）和n（不包括）之间。
int index = r.nextInt(balls.length);
if(b[index]){
continue;
}
redBalls[i++] = balls[index];
b[index] = true;
//检查redballs数组是否存满,
if(i == redBalls.length) break;
}
//红球数组排序
Arrays.sort(redBalls);
//红球数组扩容后形成新数组
String[]
allBalls=Arrays.copyOf(redBalls,redBalls.length+1);
//随机抽取"0"-"16"号码的球放在新数组的最后一个位置
allBalls[allBalls.length-1]=balls[r.nextInt(16)];
System.out.println(Arrays.toString(allBalls));
}
}。