JAVA非法启动类型

我的节目：

我收到以下错误：

m.java:31:类型的非法开始

。语法绝对正确，我已经检查过无数次了。怎么了

public class m
{
    public static void main (String[] args)
    {
        boolean bool = true;

        while(bool)
        {
            rand_number player_1 = new rand_number();
            System.out.println("Player_1 guessed " + player_1.rand_n);

            rand_number player_2 = new rand_number();
            System.out.println("Player_2 guessed " + player_2.rand_n);

            rand_number player_3 = new rand_number();    
            System.out.println("Player_3 guessed " + player_3.rand_n);

            if(player_1.guessed || player_2.guessed || player_3.guessed)
            {
                System.out.println("We have a winner");   
                bool = false;
            }
        }
    }
}

class rand_number
{
    int rand_n = (int)(Math.random() * 10);

    if(rand_n == 2) 
    {
        boolean guessed = true;
    }
}

只能在类级别进行字段声明。类似这样的if语句需要位于方法、构造函数或初始值设定项块中

您可以这样删除if语句：

class rand_number
{
    //...    
    if(rand_n == 2) 
    {
        boolean guessed = true;
    }
}

---

但我质疑，为什么您希望在创建时设置此值，而不是响应某些用户操作。

您的语法完全错误<代码>随机数不包含方法，但尝试执行条件

---

如果你想做随机数，你应该试试下面的

random

类：

boolean guessed = rand_n == 2;

---

您应该看看，它有助于获得任何java开发人员都能在一秒钟内理解的干净代码。例如，类名称以大写字母开头

Random random = new Random();
int numberToFind = random.nextInt(2);