匿名类声明中的语句

我正在浏览oracle文档中的匿名类教程(https://docs.oracle.com/javase/tutorial/java/javaOO/anonymousclasses.html)

我已经复制了本教程中使用的代码.(注释Statement1和Statement2由我添加):

public class HelloWorldAnonymousClasses {

    interface HelloWorld {
        public void greet();
        public void greetSomeone(String someone);
    }

    public void sayHello() {

        class EnglishGreeting implements HelloWorld {
            String name = "world";
            public void greet() {
                greetSomeone("world");
            }
            public void greetSomeone(String someone) {
                name = someone;
                System.out.println("Hello " + name);
            }
        }

        HelloWorld englishGreeting = new EnglishGreeting();

        HelloWorld frenchGreeting = new HelloWorld() {
            String name = "tout le monde"; //Statement1
            public void greet() {
                greetSomeone("tout le monde");
            }
            public void greetSomeone(String someone) {
                name = someone;
                System.out.println("Salut " + name);
            }
        };

        HelloWorld spanishGreeting = new HelloWorld() {
            String name = "mundo"; //Statement2
            public void greet() {
                greetSomeone("mundo");
            }
            public void greetSomeone(String someone) {
                name = someone;
                System.out.println("Hola, " + name);
            }
        };
        englishGreeting.greet();
        frenchGreeting.greetSomeone("Fred");
        spanishGreeting.greet();
    }

    public static void main(String[] args) {
        HelloWorldAnonymousClasses myApp =
            new HelloWorldAnonymousClasses();
        myApp.sayHello();
    }            
}

本教程继续解释:匿名类表达式包含以下内容:

新的运营商

要实现的接口的名称或要扩展的类.在此示例中,匿名类正在实现接口HelloWorld.

括号,包含构造函数的参数,就像普通的类实例创建表达式一样.注意:实现接口时,没有构造函数,因此您使用一对空括号,如本例所示.

身体,是一个类声明体.更具体地说,在正文中,方法声明是允许的,但语句不是.

我对此没有感到困惑.4以上.它说匿名类声明体中不允许声明,但我可以看到它内部使用的语句.(我已经发表评论Statement1和Statement2来突出它们).

你可以解释一下教程想要从点号来传达的内容.4？

提前致谢.

不允许声明意味着不允许以下任何一种情况.

赋值表达式(aValue = 8933.234;)

任何使用++或 - (aValue++;)

方法调用(System.out.println("Hello World!");)

对象创建表达式(Bicycle myBike = new Bicycle();)

但是这份文件也说,

请注意,您可以在匿名类中声明以下内容:

字段

额外的方法(即使他们没有实现超类型的任何方法)

实例初始化器

本地课程

    HelloWorld spanishGreeting = new HelloWorld() {

        String name = "mundo"; //Statement2

        double aValue = 0.0;

        String s = "Hi"; //instance variable initializers are allowed

       // assignment statement
        aValue = 8933.234; // not allowed

        // increment statement
        aValue++; // not allowed

        // method invocation statement
        System.out.println("Hello World!"); // not allowed

        // object creation statement
        Bicycle myBike = new Bicycle(); //instance variable initializers are allowed

        public void greet() {
            greetSomeone("mundo");
        }
        public void greetSomeone(String someone) {
            name = someone;
            System.out.println("Hola, " + name);
        }
    };

希望这可以帮助.