I have a code that crashes and gives the following message: java.lang.IndexOutOfBoundsException: Index: -1, Size: 9
What does Index -1 mean?
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`index` : the index you tried to access `size` the actual size. – AxelH Apr 28 '17 at 11:19
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Index -1 means you passed -1 as the index to an array. How about you show the code that causes this exception? – UnholySheep Apr 28 '17 at 11:19
2 Answers
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Somewhere in your code, your index variable is getting a negative value. Could you please provide some code?
kutsyk
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It is on "Vehicle vehicle = occasionMarket.get(model).remove(index);" that the code crashes. `public static Vehicle buyOccasionCar(String model, int index)` `{` `d_occasionSales++;` `Vehicle vehicle = occasionMarket.get(model).remove(index);` `vehicle.resetPurchaseTick();` `registered_vehicles.put(vehicle.getModel(),` `registered_vehicles.get(vehicle.getModel())+1);` `return vehicle;` } – Baboo335 Apr 28 '17 at 11:35
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You should check if you index has proper value before making any operation with array or list. So before executing: `occasionMarket.get(model).remove(index);` you should check if 'index >= 0 && index < occasionMarket.get(model).length` – kutsyk Apr 28 '17 at 11:37
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Thank you for the answer, I am really new at this! How do I check the index? – Baboo335 Apr 28 '17 at 11:38
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It means that the array/ list etc you are using have total size of 9 items. But you are trying to get a record/item with index "-1". Because in most languages, array/list indexes start from "0" to "size - 1", so you can't use index either smaller than 0, or greater than size of array/list
Afridi
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