JAVA编译报错-No enclosing instance of type Test is accessible

java编译出错：

No enclosing instance of type Test is accessible. Must qualify the allocation with an enclosing instance of type Test (e.g. x.new A() where x is an instance of Test).

代码demo

public class Test
{
	interface Some
	{
		void dosome();
	}
	
	interface Other
	{
		void doOther();
	}
	
	class SomeImpl implements Some,Other
	{
		@Override
		public void dosome()
		{
			System.out.println("hha");
		}
		
		@Override
		public void doOther()
		{
			System.out.println("123");
		}
	}

	public static void main(String[] args)
	{
		// TODO Auto-generated method stub
		//Some some = new Test().new SomeImpl();
		Some some = new SomeImpl();
		some.dosome();
		
		Other other = (Other)some;
		other.doOther();
	}

}

解决方式：

报错代码改为Some some = new Test().new SomeImpl();即可

原因是是因为内部类是动态的（无static关键字修饰），而main方法是静态的，普通的内部类对象隐含地保存了一个引用，指向创建它的外围类对象，所以要在static方法（类加载时已经初始化）调用内部类的必须先创建外部类。