Java: using a RuntimeException to escape from a Visitor

I am being powerfully tempted to use an unchecked exception as a short-circuit control-flow construct in a Java program. I hope somebody here can advise me on a better, cleaner way to handle this problem. The idea is that I want to cut short the recursive exploration of sub-trees by a visitor without having to check a "stop" flag in every method call. Specifically, I'm building

Java:使用RuntimeException从访客转义

我正强烈地试图在Java程序中使用未经检查的异常作为短路控制流构造。 我希望这里的某个人能够以更好,更清洁的方式向我提出建议,以解决这个问题。 这个想法是,我想减少访问者对子树的递归探索,而不必在每个方法调用中检查“停止”标志。 具体来说,我使用抽象语法树上的访问者构建控制流图。 AST中的return语句应停止对子树的探索,并将访问者发送回最近的包含if / then或loop块。 Visitor超类(来自XTC库)定义 Object

JavaBean and relation with BeanInfo, are they related?

Is there any relationship between JavaBean and BeanInfo? I read various posts/questions and about Java Bean it is mentioned a bean is a regular class which adheres to some rule (private data members, getters() , setters(), implements Serializabe interface...). I was going through book "Java Complete reference, 8th Edition" and came across BeanInfo, in chapter on "Java Beans"

JavaBean和与BeanInfo的关系,它们是相关的吗?

JavaBean和BeanInfo之间有任何关系吗? 我读过各种帖子/问题,关于Java Bean,它提到了bean是一个遵守某些规则的常规类(私有数据成员,getters(),setters(),实现Serializabe接口...)。 我正在阅读“Java Complete reference,8th Edition”一书,并在“Java Beans”一章中遇到了BeanInfo。 Java Bean与BeanInfo有什么关系? 虽然我试图找到各种帖子,但我仍然无法完全理解Java bean是如何有用的,如何遵循一些类的规则

Can a JavaBean have methods besides getters and setters?

According to definitions I find in the internet a JavaBean is a Java class that satisfies these conditions: All instance attributes are private All instance attributes have public getters and setters The class has a parameterless constructor The class implements the Serializable interface What I would like to know is that if I add method to a Javabean can we still call it a Javabean?

JavaBean除了getter和setter之外还有其他方法吗?

根据我在网上找到的定义,JavaBean是一个满足以下条件的Java类: 所有实例属性都是私有的 所有的实例属性都有公共的getter和setter 该类有一个无参数的构造函数 该类实现Serializable接口 我想知道的是, 如果我将方法添加到Javabean中,我们仍然可以将它称为Javabean? 例如, 我们可以说下面的类是JavaBean吗? public class Person implements Serializable { private String name; public Person(){}

JavaBean equivalent in Python

I am fairly new to using Python as a OOP. I am coming from a Java background. How would you write a javabean equivalent in python? Basically, I need a class that: Implements serializable. Has getters and setters -> private properties dummy constructor Any inputs? I am looking for a sample code! You don't, because Python is not Java. Most likely you should just write a less t

JavaBean在Python中是等效的

我是使用Python作为OOP的新手。 我来自Java背景。 你将如何在python中编写一个javabean等价物? 基本上,我需要一个类: 实现可序列化。 拥有getter和setter - >私有属性 虚拟构造函数 任何投入? 我正在寻找一个示例代码! 你不这样做,因为Python不是Java。 很可能你应该写一个不太平凡的类,构造一个namedtuple,传递一个字典或类似的东西。 但要回答这个问题: 无论是可serializable还是“实现接口”在P

What are JavaBeans in plain English?

Before I start I would just like everyone know that I did indeed spend a good time googling this and found a lot of explanations and definitions. But even so after spending hours reading the subject still seems rather vague. I know I have to ask questions that can better the community but this one is just for me to see if I have a clear understanding of JavaBeans. From what I can make out, a

简单英语中的JavaBeans是什么?

在我开始之前,我想让每个人都知道我确实花了很多时间在Google上搜索并找到了很多解释和定义。 但即使如此,花费数小时阅读该主题后,仍然显得相当模糊。 我知道我必须提出可以改善社区的问题,但这只是为了让我看看我是否对JavaBeans有清晰的认识。 从我所能做出的事情来看,JavaBean基本上就像其他任何java类一样,只是它遵循某些约定,即: 该类必须实现Serializeable 类属性被认为是私人的,他们的名字以小写字母开

What is the advantage of using Java Beans?

I believe I understand what Java Beans are: Java class(es) which contain a no-arg constructor, are serializable, and expose their fields with getters and setters. Does a Java Bean have to expose all of its fields in order to qualify as a bean? If no, does it even have to expose any? May Java Beans include constructors with arguments as well as a no-arg constructor? What is the purpose of J

使用Java Bean的优点是什么?

我相信我明白什么是Java Beans:包含无参数构造函数的Java类是可序列化的,并将它们的字段与getter和setter公开。 Java Bean是否必须公开其所有字段才能成为bean? 如果否,它甚至不得不公开任何? 可能Java Beans包含带有参数的构造函数以及无参数构造函数? 除了符合某种编码风格之外,Java Beans的目的是什么? 似乎有很多关于“豆类”或“豆类”的讨论,但我不知道为什么它们是有利的,具体而言。 我完全可以做出无参

Difference between DTO, VO, POJO, JavaBeans?

Have seen some similar questions: What is the difference between a JavaBean and a POJO? What is the Difference Between POJO (Plain Old Java Object) and DTO (Data Transfer Object)? Can you also please tell me the contexts in which they are used? Or the purpose of them? JavaBeans A JavaBean is a class that follows the JavaBeans conventions as defined by Sun. Wikipedia has a pretty good

DTO,VO,POJO,JavaBeans之间的区别?

已经看到一些类似的问题: JavaBean和POJO有什么区别? POJO(普通旧Java对象)和DTO(数据传输对象)之间的区别是什么? 你能否也请告诉我他们使用的背景? 还是他们的目的? 的JavaBeans JavaBean是一个遵循Sun定义的JavaBeans约定的类。 维基百科对JavaBeans是什么进行了很好的总结: JavaBeans是可重用的Java软件组件,可以在构建器工具中直观地操作。 实际上,它们是用符合特定约定的Java编程语言编写的类。

What is a "Java Bean"?

This question already has an answer here: What is a JavaBean exactly? 14 answers Any serializable java class (implementing java.io.Serializable) that follows specific conventions: a no-argument constructor, and properties accessible via get/set/is accessors. The idea is to make it predictable, so that properties etc can be discovered automatically through reflection - of great help in tool

什么是“Java Bean”?

这个问题在这里已经有了答案: 什么是JavaBean? 14个答案 任何遵循特定约定的可序列化java类(实现java.io.Serializable):无参数构造函数,以及可通过get / set /访问的属性是访问器。 这个想法是让它可以预测,以便通过反射自动发现属性等 - 对工具和框架开发有很大的帮助。 http://en.wikipedia.org/wiki/JavaBean JavaBeans是可重用的Java软件组件,可以在构建器工具中直观地操作。 实际上,它们是用符合特定

Places where JavaBeans are used?

What is a JavaBean and why do I need it? Since I can create all apps with the class and interface structure? Why do I need beans? And can you give me some examples where beans are essential instead of classes and interfaces? Please explain the essentiality of a bean in the below context: Wep apps Standalone apps They often just represents real world data. Here's a simple example o

使用JavaBeans的地方?

什么是JavaBean,为什么我需要它? 既然我可以用类和接口结构创建所有的应用程序? 为什么我需要豆子? 你能给我一些例子,说明bean是必不可少的,而不是类和接口? 请在下面的上下文中解释一下bean的本质: Wep应用程序 独立的应用程序 它们通常只代表真实世界的数据。 这里是一个Javabean的简单例子: public class User implements java.io.Serializable { // Properties. private Long id; private

Is Void really uninstantiable?

The javadoc for Void says: The Void class is an uninstantiable placeholder class to hold a reference to the Class object representing the Java keyword void. but the constructor is simply: private Void() {} and this code instantiates a Void : Constructor<Void> c = Void.class.getDeclaredConstructor(); c.setAccessible(true); Void v = c.newInstance(); // Hello sailor So Void is not unin

Void真的不可信吗?

Void的javadoc说: Void类是一个不合理的占位符类,用于保存对表示Java关键字void的Class对象的引用。 但构造函数很简单: private Void() {} 并且这段代码实例化一个Void : Constructor<Void> c = Void.class.getDeclaredConstructor(); c.setAccessible(true); Void v = c.newInstance(); // Hello sailor 所以Void并不是无稽之谈。 有没有办法让Void真正无法实现? 让你的构造函数是私有的,并且没有任何