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POHow is Java's notion of static different from C#'s?
 

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  1. POHow is Java's notion of static different from C#'s?
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    <p>I am reading Josh Bloch's book <em>Effective Java</em> and he suggests using a builder design pattern when building objects that have large amounts of members. From what I can see it isn't the vanilla design pattern but looks like his variation. I rather like the look of it and was trying to use it in a C# web application that I am writting. This is the code written in Java and works perfectly</p> <pre><code>public class Property { private String title; private String area; private int sleeps = 0; public static void main(String[] args) { Property newProperty = new Property.Builder("Test Property").Area("Test Area").Sleeps(7).build(); } private Property(Builder builder) { this.title = builder.title; this.area = builder.area; this.sleeps =builder.sleeps; } public static class Builder{ private String title; private String area; private int sleeps = 0; public Builder (String title){ this.title = title; } public Builder Area(String area){ this.area = area; return this; } public Builder Sleeps(int sleeps){ this.sleeps = sleeps; return this; } public Property build() { return new Property(this); } } } </code></pre> <p>When I put this into what I think is the C# equivalent</p> <pre><code> public class Property { private String title; private String area; private Property(Builder Builder) { title = Builder.title; area = Builder.area; } public static class Builder { // Required parameters private String title; private String area; // Optional parameters private int sleeps = 0; public Builder(String val) { this.title = val; } public Builder Area(String val) { this.area = val; return this; } public Builder Sleeps(int val) { this.sleeps = val; return this; } public Property build() { return new Property(this); } } } </code></pre> <p>Then I get compiler warnings. Most of them "cannot declare instance members in a static class".</p> <p>So my question is firstly what have I missed? If I have missed something, can I do it in the manner Josh Bloch recommends but in C#, and lastly, and this one important too, is this thread-safe?</p>
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    1. USMichael Myers
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    1. COWhat "version" :P do you have of Effective Java? I have an old one and it doesn't cover Builder. I read that was one of the new chapters added after Josh experience @ Google.
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