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POWhy doesn't autoboxing overrule varargs when using method overloading in Java 7?
 

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  1. POWhy doesn't autoboxing overrule varargs when using method overloading in Java 7?
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    <p>We have a class LogManager in our Java project which looks like this:</p> <pre><code>public class LogManager { public void log(Level logLevel, Object... args) { // do something } public void log(Level logLevel, int value, Object... args) { // do something else } } </code></pre> <p>When compiling the project with <em>OpenJDK 6</em> under Debian everyting works fine. When using <em>OpenJDK 7</em> the build (done with ant) produces the following errors and the build fails:</p> <pre><code>[javac] /…/LogManager.java:123: error: reference to log is ambiguous, both method log(Level,Object...) in LogManager and method log(Level,int,Object...) in LogManager match [javac] log(logLevel, 1, logMessage); [javac] ^ [javac] /…/SomeOtherClass.java:123: error: reference to log is ambiguous, both method log(Level,Object...) in LogManager and method log(Level,int,Object...) in LogManager match [javac] logger.log(logLevel, 1, logMessage); [javac] ^ </code></pre> <p>As long as the <em>1</em> is not autoboxed, the method call should be unambiguous as <em>1</em> is an int and cannot be upcast to Object. So why doesn't autoboxing overrule varargs here?</p> <p>Eclipse (installed using the tar.gz from eclipse.org) compiles it no matter if OpenJDK 6 is installed or not.</p> <p>Thank's a lot for your help!</p> <p><strong>Edit:</strong></p> <p>The compiler gets the option <code>source="1.6"</code> and <code>target="1.6"</code> in both cases. The Eclipse compiling note is just meant as a comment.</p>
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