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Java Array Size and Length Basics

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Size and Initialization: Java array size is fixed and cannot be changed after initialization
Theoretical maximum size is 2,147,483,647 elements
Array size is set when initialized with new keyword
Elements are initialized to null or zero for primitive types
Length Property: Array size is accessed through length property
Length property is not a method, unlike String and ArrayList
Length includes both null and non-null characters
Length property cannot be accessed with round brackets
Size vs Length: Java arrays don't have size() or length() methods
Collection classes like ArrayList have size() method
String class has length() method for element count
Confusing length property with String's length() causes compile time error