Web Reference: Jul 23, 2025 · Reference variable is used to point object/values. 2. Classes, interfaces, arrays, enumerations, and, annotations are reference types in Java. Reference variables hold the objects/values of reference types in Java. 3. Reference variable can also store null value. Aug 14, 2015 · Variables hold onto a value, so if two variables held onto an object, they'd have to make two copies, one for each variable. References are the go-between that resolves this. Jan 16, 2026 · In Java, when you create an object using the new keyword, memory is allocated on the heap to store the object's state. However, you don't directly access the object in the heap. Instead, you use a reference variable. A reference variable holds the memory address of the object in the heap.
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