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2902467
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2010-05-25T06:25:29.943
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2010-05-25T06:33:25.927
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2017-05-23T12:17:20.353
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2902458
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<p>Method arguments in Java must be expressions. An operator by itself is not an expression. This is not possible in Java.</p> <p>You can, of course, pass objects (maybe <code>enum</code> constants) that represents those operators, and act accordingly, but you can't pass the operators themselves as parameters.</p> <hr> <h3>Additional tips</h3> <p>Since you're just starting Java, it's best to ingrain these informations early on to ease your future development. </p> <ul> <li>Method names starts with lowercase: <code>calculate</code> instead of <code>Calculate</code></li> <li>Variable names starts with lowercase: <code>operator</code> instead of <code>Operator</code></li> <li><code>Double</code> is a reference type, the box for primitive type <code>double</code>. <ul> <li><em>Effective Java 2nd Edition, Item 49: Prefer primitive types to boxed primitives</em></li> </ul></li> <li>Don't <code>return "error..."</code>. Instead, <code>throw new IllegalArgumentException("Invalid operator");</code></li> </ul> <h3>See also</h3> <ul> <li><a href="http://java.sun.com/j2se/1.5.0/docs/guide/language/autoboxing.html" rel="nofollow noreferrer">Java Language Guide/Autoboxing</a></li> <li><a href="http://java.sun.com/docs/books/tutorial/essential/exceptions/index.html" rel="nofollow noreferrer">Java Lessons/Exceptions</a></li> <li><a href="http://java.sun.com/docs/codeconv/html/CodeConventions.doc8.html" rel="nofollow noreferrer">Coding Conventions/Naming</a> <ul> <li>Unfortunate typo in this document: <a href="https://stackoverflow.com/questions/2711186/how-is-this-statement-making-sense-suns-naming-convention-for-java-variables">How is this statement making sense? (Sun’s naming convention for Java variables)</a></li> </ul></li> </ul>
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1. POIs it possible to pass arithmetic operators to a method in java?
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