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public void check() { System.out.println(Math.min(-0.0,+0.0)); System.out.println(Math.max(-0.0,+0.0)); System.out.println(Math.min(-0.0,+0.0) == Math.max(0.0,+0.0)); } answer: -0.0 +0.0 true if there are positive and negative zero, why the answer of (Math.min(-0.0,+0.0) == Math.max(0.0,+0.0)) will be true?? thanks for help.

Hi, This has to do with the implementation of Math.min() and Math.max() methods.These methods treat -0.0 as less than +0.0.However, these are NOT numeric comparisions. When you test -0.0 == +0.0 you are doing a numeric comparision which results in true. Hope this helps, Sandeep SCJP2, OCSD(Oracle JDeveloper), OCED(Oracle Internet Platform)

<b>Sandeep</b> <br /> <br /><b>Sun Certified Programmer for Java 2 Platform</b><br /> <br /><b>Oracle Certified Solution Developer - JDeveloper</b><br /><b>-- Oracle JDeveloper Rel. 3.0 - Develop Database Applications with Java </b><br /><b>-- Object-Oriented Analysis and Design with UML</b><br /> <br /><b>Oracle Certified Enterprise Developer - Oracle Internet Platform</b><br /><b>-- Enterprise Connectivity with J2EE </b><br /><b>-- Enterprise Development on the Oracle Internet Platform </b>