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copied!<p>This question is listed with a Java tag so...</p> <p>Generic switch statement:</p> <pre><code>// ... within class scope private final int CONSTANT_1 = 1; private final int CONSTANT_2 = 2; private final int CONSTANT_3 = 3; // ... public void doStuff(MyObject myObject){ int variable = myObject.getIntValue(); switch(variable){ case CONSTANT_1: System.out.println(variable + " is equal to " + CONSTANT_1); // use a break statement to tell the switch to stop here // or else it will execute all subsequent cases: break; case CONSTANT_2: System.out.println(variable + " is equal to " + CONSTANT_2); // what happens if I leave out the break? case CONSTANT_3: System.out.println(variable + " is equal to " + CONSTANT_2); break; default: System.out.println(variable + " wasn't equal to anything!"); } </code></pre> <p>Let's say I run through this 3 times and "myObject.getIntValue()" returns these values in this order; 3, 1, 2, and finally 42. Then the following output would be generated: First time through using the value '3'...</p> <blockquote> <p>3 is equal to 3</p> </blockquote> <p>Second time through using the value '1'...</p> <blockquote> <p>1 is equal to 1</p> </blockquote> <p>Third time through using the value '2'...</p> <pre>2 is equal to 2 2 is equal to 3</pre> <p>Fourth time through using the value '42' ...</p> <blockquote> <p>42 wasn't equal to anything!</p> </blockquote> <p>Notice the third run has two lines (and one incorrect one) because I left out the break keyword for the second case.</p> <p>Now in Java 1.5 and up, you can also switch on the Enum type:</p> <pre><code>public void doStuff(MyObject myObject){ MyEnumType varType = myObject.getEnum(); switch(varType){ case MyTypeOne: // everything else is the same -- nothing special here. // put whatever code you want in. break; case MyTypeTwo: // everything else is the same -- nothing special here. // put whatever code you want in. break; case MyTypeThree: // everything else is the same -- nothing special here. // put whatever code you want in. break; default: // code for unknown case goes here } } </code></pre>

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