java – Android随机数

发布时间：2020-12-15 08:34:44 所属栏目：Java 来源：网络整理

导读：我从数组生成一个随机卡.并分配它.’ 下面是代码..但它显示错误. 问题是什么？ public void rand() { String rank[]= {"tclub1.png","tclub2.png","tclub3.png","tclub4.png","tclub5.png","tclub6.png","tclub7.png","tclub8.png","tclub9.png","tclub10.pn

我从数组生成一个随机卡.并分配它.’
下面是代码..但它显示错误.
问题是什么？

public void rand() {
    String rank[]=  {"tclub1.png","tclub2.png","tclub3.png","tclub4.png","tclub5.png","tclub6.png","tclub7.png","tclub8.png","tclub9.png","tclub10.png","tclub11.png","tclub12.png","tclub13.png"};

    Random randInt = new Random();

    int b = randInt.nextInt((rank.length));
    showcard1.setBackgroundResource(b); 
}

解决方法

b是一个int

因此,您需要在代码中的某个位置对[b]数组进行排名

根据你的代码,也许应该阅读showcard1.setBackgroundResource(秩并[b]);

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!