无法从静态上下文中引用非静态方法

Question

public   class  WUYU
{
 public static void main(String[] args)
 {
          person p= new person();
          p.name="张三";
          p.age= 18; 
          p.gender = true;
         System.out.println("姓名；"  + p.name +    "年龄"  + p.age );
        
          eat();
          sleep();

   }
 static class person{
 String name;
 int age;
 boolean gender;
}
  public void eat(){
     System.out.println("用嘴吃");
  }
   public void sleep(){
     System.out.println("躺着睡");
  }
}

Answer 1

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

Answer 2

在方法前加p.又显示找不到符号 这是为什么呢