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    <p>As posted elsewhere, the answer to your exact question is, "No." And my addition: "Use a more expressive language, like Lisp, Python, Ruby, or one like them."</p> <p>I suspect that you're asking the wrong question though. What you really want is a way to get the alpha value of an arbitrary color. The object-oriented design advocate would use this as an opportunity to fill your head with factory methods, subtype polymorphism, enumerated types, and other such things.</p> <p>Given my completely-uneducated guesstimate about your level of coding and the complexity of the project, it looks like an acceptable workaround (if not The Right Way) is a lot simpler:</p> <pre><code>int newAlpha = 0; if(colorName.equals("yellow") newAlpha = yellow.getAlpha(); else if(colorName.equals("red") newAlpha = red.getAlpha(); else if(colorName.equals("blue") newAlpha = blue.getAlpha(); else //raise some kind of exception, assert false, or do something else that seems sensible </code></pre> <p>(Note that I've slightly changed a few names to match Java's style.)</p> <p>I have no idea what's going on in the <code>Color</code> class (or even how <code>red</code>, <code>yellow</code>, and <code>blue</code> are different--with the current code they'll be the same thing (local variable names do not affect the object they refer to)), but it's probably appropriate to break the if-sequence into a separate method. And/or use a <code>HashMap</code> thus:</p> <pre><code>HashMap&lt;String, Integer&gt; alphaValues = new HashMap&lt;String, Integer&gt;(); alphaValues.put("red", /* something like red.getAlpha() */); //etc. // ... newAlpha = alphaValues.get(colorName); </code></pre> <p>I haven't really addressed the scope issue--I'm sure you can figure it out.</p> <p>Hope that helps!</p> <p><em>Edit: Dave Newton beat me to the punch about the hashmap--he edited his post while I was creating mine.</em></p>
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    1. POJava: Setting a variable to a variable of a class, where the name of the class is a string?
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    1. COThis would get no love in most of the "expressive" languages either. For the general sense a map *is* the appropriate structure -- some languages just support the idiom (or that of a nice "case expression") better.
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