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POJava HashMap get works but containsKey does not
 

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  1. POJava HashMap get works but containsKey does not
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    <p>I am trying to locate a key in a HashMap. I can print the selected key by using 'get' but when I use 'containsKey' in an if statement, it is not found.</p> <p>I KNOW the key is present in the Map but it keeps returning false. Any ideas people?</p> <p>My code:</p> <pre><code>public static boolean checkLowerStructuralSupport(Location location) { boolean hasSupport = false; Location supportingLocation = new Location(location.getX(), location.getY(), location.getZ() - 1); System.out.println(_levels.get(supportingLocation.getZ()).getLevelSites2().get(supportingLocation)); //works if (_levels.get(supportingLocation.getZ()).getLevelSites2().containsKey(supportingLocation)) { hasSupport = true; } else { hasSupport = false; } return hasSupport; } </code></pre> <p>Here is the code for the Location class:</p> <pre><code>public class Location { protected int _x; protected int _y; protected int _z; public Location(int xAxis, int yAxis, int zAxis) { this._x = xAxis; this._y = yAxis; this._z = zAxis; } public void equals() { //not implemented yet } public void HashCode() { //not implemented yet } public String toString() { String locationString = Integer.toString(_x) + Integer.toString(_y) + Integer.toString(_z); return locationString; } public void setX(int XAxis) { this._x = XAxis; } public int getX() { return this._x; } public void setY(int YAxis) { this._y = YAxis; } public int getY() { return this._y; } public void setZ(int ZAxis) { this._z = ZAxis; } public int getZ() { return this._z; } } </code></pre>
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    1. USkakajan
    1. USburntsugar
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    1. COIs this the exact code you're running? If not please provide the exact code you're using (I only ask because in another question, what you provided was not representative of your problem, and caused much confusion).
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      1. USJack Leow
    2. COAlso, is this behavior consistent? I.e., get(...) *always* returns something when expected, and containsKey(...) *never* does?
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      1. USJack Leow
    3. COAre you developing with a JDK that includes the source code? If so, perhaps you should try debugging the code and stepping into the HashMap methods (containsKey and get) to see if you can find any unusually behavior. Don't worry, these methods are terribly complex.
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      1. USAdam Paynter
 

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