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. Let's add a Person type variable called ball into the program, and assign joanas its initial value. What happens then? The statement Person ball = joan; creates a new Person variable ball, and copies the value of the variable joan as its value. As a result, ball refers to the same object as joan. Let's inspect the same example a little more thoroug...
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