Java / Data types
When does autoboxing and unboxing occur in Java?
Autoboxing and unboxing can happen where an object is expected and primitive type is provided, for example, In a method invocation where an object argument is expected but primitive values are provided, Java automatically converts primitive into its equal value Object.
lassic use of autoboxing is adding primitive types into Collection like ArrayList in Java.
ArrayList<Integer> intsList = new ArrayList<Integer>(); intsList.add(1); //autoboxing - primitive to object intsList.add(2);
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