The JVM uses three loaders: Bootstrap ClassLoader (loads core API classes from rt.jar ), Extension ClassLoader (loads classes from extension directories), and Application ClassLoader (loads classes from the defined classpath).
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Java support Multiple inheritance using classes to avoid ambiguity (The Diamond Problem). However, multiple inheritance is fully supported through interfaces. Polymorphism
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Cannot be instantiated; acts as a blueprint for subclasses. Member-Level Modifiers Private: Restricted strictly to the defining class. The JVM uses three loaders: Bootstrap ClassLoader (loads
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Collection (Interface) / | \ List (Interface) Set (Interface) Queue (Interface) / \ / \ ArrayList LinkedList HashSet TreeSet Key Framework Breakdowns
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Java is a strongly typed language, meaning every variable must have a declared type.
Non-synchronized, accepts one null key. Faster performance.