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POWhat does void do in java?
 

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    <blockquote> <p>The return type—the data type of the value returned by the method, or void if the method does not return a value.</p> </blockquote> <p><a href="http://download.oracle.com/javase/tutorial/java/javaOO/methods.html" rel="noreferrer">http://download.oracle.com/javase/tutorial/java/javaOO/methods.html</a></p> <p>Okay, then.. Here is my question:</p> <pre><code>public class EnumTest { Day day; public EnumTest(Day day) { this.day = day; } public void tellItLikeItIs() { switch (day) { case MONDAY: System.out.println("Mondays are bad."); break; case FRIDAY: System.out.println("Fridays are better."); break; case SATURDAY: case SUNDAY: System.out.println("Weekends are best."); break; default: System.out.println("Midweek days are so-so."); break; } } public static void main(String[] args) { EnumTest firstDay = new EnumTest(Day.MONDAY); firstDay.tellItLikeItIs(); EnumTest thirdDay = new EnumTest(Day.WEDNESDAY); thirdDay.tellItLikeItIs(); EnumTest fifthDay = new EnumTest(Day.FRIDAY); fifthDay.tellItLikeItIs(); EnumTest sixthDay = new EnumTest(Day.SATURDAY); sixthDay.tellItLikeItIs(); EnumTest seventhDay = new EnumTest(Day.SUNDAY); seventhDay.tellItLikeItIs(); } } </code></pre> <p><a href="http://download.oracle.com/javase/tutorial/java/javaOO/enum.html" rel="noreferrer">http://download.oracle.com/javase/tutorial/java/javaOO/enum.html</a></p> <p>The above code does not work without void.</p> <pre><code>Exception in thread "main" java.lang.Error: Unresolved compilation problems: The method tellItLikeItIs() is undefined for the type EnumTest </code></pre> <p>What did I miss out? Why is there a void in there? And it does return a string?</p>
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    1. COAll methods in Java must be one return type. void tell's to the VM that that specific method will not return anything.
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    2. COThey picked void because it goes hand and hand with "null". I would have preferred they used "empty" (which sounds awkward, but wouldn't if we'd've been using it for 20 or 30 years.)
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