Your Essential Resource for Understanding the sssniperwolf Leak Fallout and its Causes - Postcolonial Perspectives
@Borat - "resource leak" implies that some system resource (usually memory) is being lost or wasted needlessly. Usually this will impact you when you start getting OutOfMemoryErrors thrown during the normal operation of your program. In the above snippet, there is a resource leak, as if an IOException was thrown by write(), close() will never be called.
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Now my question is : What exactly is a resource leak? How can they cause harm to me? If each java program is executed in it's own instance of the JVM, in an enclosed environment, how exactly can these "resource leaks" cause me harm? Is it possible for other malicious ...
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The warning continues to be emitted because you haven't guaranteed the resource will be closed in all cases, normal and exceptional. But you should ignore the warning in this case. Closing your scanner will close the underlying standard input stream as well, and it is rare to want to close standard input (if ever). What is happening is that you are never closing your Scanner, so that resource might be getting "leaked". What this means is that the JVM is allocating, deallocating, and managing objects (resources) behind the scenes and needs to know if your Scanner object is still being used, or if it can free the memory (do "garbage collection") to use for something else.
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When the resource is closed, you ... Scanner is a Closable, so your IDE correctly recognizes that you've opened it but haven't explicitly called close() on it when you're done with it, so there's a theoretical resource leak here. However, in this case, input is a Scanner based on System.in, which you should never close explicitly. To make a long story short, you should dismiss this warning.