Java object reference which points to another object reference
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Is Java "pass-by-reference" or "pass-by-value"?
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Does C++ pass objects by value or reference?
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Compare two objects in Java with possible null values
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How do I copy an object in Java?
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Comparing references in Java
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What's the difference between primitive and reference types?
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How to pass an object from one activity to another on Android
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A Base Class pointer can point to a derived class object. Why is the vice-versa not true?
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Are objects in PHP passed by value or reference?
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Reference type still needs pass by ref?
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Pointer vs. Reference
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Map of with object references as keys?
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Using two (or more) objects as a HashMap key
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How to compare two java objects
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Referencing other points(rows) in field calculator
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System.NullPointerException: Attempt to de-reference a null object
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Object referencing its own property on initialization