NullPointerException error on Maps

Discussion in 'Plugin Development' started by Jaker232, Jan 27, 2014.

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    Alright, so I'm fulfilling a plugin request. I've gotten around most of the features and decided to give a shot. However, the error I'm getting is passing event to the plugin error, caused by a NullPointerException on line 28 in my Listener class. When I go there, I have this line.
    2. if(!db.isInMemory(b.getLocation())) {

    I have a class variable that manages the plugin's main functionality, automatically restoring ores. However, isInMemory is a boolean and uses the Location parameter. This is what I have for the method:
    3. public boolean isInMemory(Location locBlock) {
    4. if(ore.containsKey(locBlock) && time.containsKey(locBlock)) {
    5. return true;
    6. } else {
    7. return false;
    8. }
    9. }

    What I don't get is, the containsKey if I remember should at least return true or false, not null. I do not know what is going on. Does anyone have an idea?
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    You're checking maps that the method doesn't know about? Unless it's somewhere else in the class.

    Another "b" actually defined? is db?
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    Db and b is defined. The maps are defined outside the class and are initialized in the constructor.
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