在java中实例化递归定义的复合泛型类。

class RecursiveGeneric<T extends RecursiveGeneric<T>> {
    private T value;

    public RecursiveGeneric(T value) {
        this.value = value;
    }

    public T getValue() {
        return value;
    }

    public void setValue(T value) {
        this.value = value;
    }
}

RecursiveGeneric<RecursiveGeneric<RecursiveGeneric<Integer>>> instance = 
    new RecursiveGeneric<>(new RecursiveGeneric<>(new RecursiveGeneric<>(42)));

RecursiveGeneric<RecursiveGeneric<RecursiveGeneric<Integer>>> instance = 
    new RecursiveGeneric<>(new RecursiveGeneric<>(new RecursiveGeneric<>(42)));

int value = instance.getValue().getValue().getValue(); // 获取最内层的Integer值
System.out.println(value); // 输出: 42

instance.setValue(new RecursiveGeneric<>(new RecursiveGeneric<>(new RecursiveGeneric<>(100))));
int newValue = instance.getValue().getValue().getValue(); // 获取更新后的Integer值
System.out.println(newValue); // 输出: 100