![]() To create a HashMap with 60 mappings you would have to calculate the capacity by dividing the number of mappings by the load factor. Thus the HashMap initialized with the argument 60 can actually hold just 45 mappings. Here comes the curveball - the HashMap is initialized with a default load factor of 0.75, meaning that as soon as the HashMap is 75% full, it is rebuilt with double the size. When generating a HashMap with the argument 60, one might think that means that this HashMap offers space for 60 mappings. Changes to Preallocated HashMap Creationīefore we get into the changes, some background on HashMaps and their flaws for those not familiar. Changes to Preallocated HashMap CreationĪs of March 2023, Java 20 is out! See our latest post covering everything you need to know on JDK 20.Let's take a look at what Java 19 brings us and what it leaves behind. ![]() This release has been noted to be in "Rampdown Phase One," as it does not include any new JDK Enhancement Proposals (JEPs), only bug fixes and minor improvements. Not being a long-term support release means the Premier Support for this version will end in March 2023. ![]()
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