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POWarnings "unchecked call" and "unchecked conversion"
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  1. POWarnings "unchecked call" and "unchecked conversion"
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    copied!<p><strong>When I compile my code I get 4 warnings - but how do I make them disappear?</strong> (and I don't mean with @SuppressWarnings)</p> <p>PS: Obviously this must have been asked before - but either I cannot find it or I cannot apply it.</p> <hr> <p><em><strong>Output</em></strong></p> <pre><code>warning: [unchecked] unchecked call to BaseWorker(C) as a member of the raw type BaseWorker [warn] return new BaseWorker(this); warning: [unchecked] unchecked conversion [warn] found : com.crashnote.BaseWorker [warn] required: com.crashnote.BaseWorker&lt;C&gt; [warn] return new BaseWorker(this); warning: [unchecked] unchecked call to SubWorker(C) as a member of the raw type SubWorker [warn] return new SubWorker(this); warning: [unchecked] unchecked conversion [warn] found : com.crashnote.SubWorker [warn] required: com.crashnote.SubWorker&lt;C&gt; [warn] return new SubWorker(this); </code></pre> <hr> <p><em><strong>Source Code</em></strong></p> <p><strong>BaseConfig</strong>: instantiates <em>BaseWorker</em></p> <pre><code>public class BaseConfig&lt;C extends BaseConfig&gt; { public BaseConfig(final Object c) { } public BaseWorker&lt;C&gt; getWorker() { return new BaseWorker(this); } } </code></pre> <p><strong>BaseWorker</strong></p> <pre><code>public class BaseWorker&lt;C extends BaseConfig&gt; { public BaseWorker(final C config) { } } </code></pre> <p><strong>SubConfig</strong>: instantiates <em>SubWorker</em></p> <pre><code>class SubConfig&lt;C extends SubConfig&gt; extends BaseConfig&lt;C&gt; { public SubConfig(final Object c) { super(c); } @Override public SubWorker&lt;C&gt; getWorker() { return new SubWorker(this); } } </code></pre> <p><strong>SubWorker</strong>: inherits from SubWorker</p> <pre><code>public class SubWorker&lt;C extends BaseConfig&gt; extends BaseWorker&lt;C&gt; { public SubWorker(final C config) { super(config); } } </code></pre> <hr> <p><em><strong>Edit</em></strong></p> <p>I tried the provided solutions but for some reason it fails now.</p> <p><strong>A)</strong></p> <pre><code>return new BaseWorker&lt;BaseConfig&gt;(this); </code></pre> <p>results in</p> <pre><code>incompatible types [error] found : BaseWorker&lt;BaseConfig&gt; [error] required: BaseWorker&lt;C&gt; [error] return new BaseWorker&lt;BaseConfig&gt;(this); </code></pre> <p><strong>B)</strong></p> <pre><code>return new BaseWorker&lt;C&gt;(this); </code></pre> <p>results in</p> <pre><code>cannot find symbol [error] symbol : constructor BaseWorker(BaseConfig&lt;C&gt;) [error] location: class BaseWorker&lt;C&gt; [error] return new BaseWorker&lt;C&gt;(this); </code></pre> <p>Hm, maybe I'm doing something wrong. This is Java 6 by the way, in case it matters.</p>
 

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