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    <p>Don't compare Strings using <code>==</code>. Use the equals or the equalsIgnoreCase(...) method instead. Understand that == checks if the two <em>objects</em> are the same which is not what you're interested in. The methods on the other hand check if the two Strings have the same characters in the same order, and that's what matters here. So instead of</p> <pre><code>if (fu == "bar") { // do something } </code></pre> <p>do, </p> <pre><code>if ("bar".equals(fu)) { // do something } </code></pre> <p>or,</p> <pre><code>if ("bar".equalsIgnoreCase(fu)) { // do something } </code></pre> <p>One way to simplify your code is to create a RockPaperScissors enum and give it its on compare method. Something like:</p> <pre><code>enum RockPaperScissors { ROCK("Rock"), PAPER("Paper"), SCISSORS("Scissors"); private String text; private static int[][] winMatrix = {{0, -1, 1}, {1, 0, -1}, {-1, 1, 0}}; private RockPaperScissors(String text) { this.text = text; } @Override public String toString() { return text; } // can't use compareTo since it is a final method for enums public int compareVs(RockPaperScissors other) { int thisOrdinal = ordinal(); int otherOrdinal = other.ordinal(); return winMatrix[thisOrdinal][otherOrdinal]; } } </code></pre> <p>Then to compare one enum vs. another, simply call its compareVs(...) method passing in the other enum.</p> <p>So your huge if/else block would reduce down to:</p> <pre><code>// assuming that user and comp are RockPaperScissors variables int result = user.compareVs(comp); if (result == 1) { System.out.println("You've won!"); } else if (result == 0) { System.out.println("It's a tie!"); } if (result == -1) { System.out.println("You've lost!"); } </code></pre>
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    1. POJava Else If Block Not Working Correctly
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    1. USHovercraft Full Of Eels
    1. USHovercraft Full Of Eels
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    1. COTo avoid NullPointerException it's better with "bar".equals(fu)
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      1. USUhlen
    2. CO@Uhlen: thank you for the excellent suggestion! Code changed.
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      1. USHovercraft Full Of Eels
    3. COThank you for showing me how to optimize the code! I'm not very familiar with enums, but when I read about them I'll definitely check back here.
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      1. USPhilip Rego
 

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