Briefly describe what autoboxing is inJava. Write code that would create an Arra

Question

• Briefly describe what autoboxing is inJava.
• Write code that would create an ArrayList that can store typeint. The list should be stored in a reference called "nums". Notethat you cannot make an ArrayList that directly stores a primitivetype.
• Write a line of code that would create an array (not ArrayList)of 20 integers called "data".
• Given an array of doubles called "values", write a loop thatwould set each element to 1.0. Hint: you'll need to use a regular"for" loop and figure out how to find out how many elements thereare in the list.

Explanation / Answer

Briefly describe whatautoboxing is in Java. Autoboxing occurs when the compiler convertsprimitive data types to objects, when an object is required. For example, suppose you have a method publicvoid fun(Object o) { System.out.println(o.toString()); } Now, because int is a primitive datatype, the method cannot be passed an int. However, the following code is legalbecause of autoboxing: int i = 2; fun(2); The compiler turns that primitive data type intoan object. Essentially what happens is the following: int i = 2; fun(new Integer(2)); ____________________ Write aline of code that would create an array (not ArrayList) of 20integers called "data". Integer[]array = new Integer[20]; ____________________ Givenan array of doubles called "values", write a loop that would seteach element to 1.0. Hint: you'll need to use a regular "for" loopand figure out how to find out how many elements there are in thelist. double[]values; for(int i= 0; i

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