What is upcasting in Java and how is it related to reference variables?
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what is reference variable in java Informational
- How can you use reflection to access and modify the fields of an object (obtained through a reference variable) at runtime?
- How do reference variables relate to string objects in Java?
- How can you obtain Class objects using reference variables or class literals?
- Explain the concept of off-heap memory and how it can be used in Java to store data outside the garbage-collected heap, potentially using direct ByteBuffer objects and references to them.
- How are multi-dimensional arrays of objects handled using reference variables in Java?
- Can a reference variable point to null in Java?
- How do local inner classes and anonymous inner classes interact with reference variables in their enclosing scope?
- What happens to GUI components when there are no more references to them?
- If an exception is caught and handled, what happens to the reference variables declared within the try block?
- Explain how reference variables are used in implementing linked data structures like linked lists or trees.
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