//外部類HelloWorld
public?class?HelloWorld?{
????
????//?內部類Inner，類Inner在類HelloWorld的內部
????public?class?Inner?{
????????
		//?內部類的方法
		public??void?show()?{
			System.out.println("welcome?to?imooc!");
		}
	}
????
	public?static?void?main(String[]?args)?{
????????
????????//?創建外部類對象
		HelloWorld?hello?=?new?HelloWorld();
????????//?創建內部類對象
		Inner?i?=?hello.new?Inner();
????????//?調用內部類對象的方法
		i.show();
	}
}