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    <p>Also, inlining of <code>public</code> constants may be a source of problems that are hard to target, since they don't cause exceptions or errors, but cause silent wrong behaviour.</p> <p>Lets say you have a class <strong>A</strong> with some <code>public static final</code> fields that are of a primitive type or a <code>String</code> and whose values can be determined at compile time.</p> <pre><code>public class A { public static final String GREETING = "Hello"; ... } </code></pre> <p>Then if another class <strong>B</strong> accesses this field, the compiler inlines the constant - i.e. replaces the <code>A.GREETING</code> reference with its value <code>"Hello"</code>. No information of where the constant value comes from is kept.</p> <p>Now comes the trouble - if you change the value of <code>GREETING</code> to lets say <code>"Hi"</code> and recompile only the class <strong>A</strong>, the inlined value in class <strong>B</strong> will remain unchanged until you recompile it too. Therefore, <strong>it is usually a better idea to rebuild the entire application from scratch</strong>, as others have already pointed out.</p> <p>A nice article discussing this problem: <a href="http://marxsoftware.blogspot.com/2009/09/inconstant-constants-in-java.html" rel="nofollow noreferrer">http://marxsoftware.blogspot.com/2009/09/inconstant-constants-in-java.html</a></p> <p>Some related SO questions:</p> <p><a href="https://stackoverflow.com/questions/1406616/is-java-guaranteed-to-inline-string-constants-if-they-can-be-determined-at-compi">Is Java guaranteed to inline string constants if they can be determined at compile time</a></p> <p><a href="https://stackoverflow.com/questions/377819/are-all-compile-time-constants-inlined">Are all compile-time constants inlined?</a></p>
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