1. Use the Java code below to draw the diagram and identify the values of the va

Question

1. Use the Java code below to draw the diagram and identify the values of the variables/expressions that follow. The value may be undefined, or the expression may be invalid. NOTE: For this exercise, each node has 3 components (number-character-link).

    LinkedListNode current = new LinkedListNode();
    LinkedListNode last;

    current.number = 37;
    current.character = 'z';
    current.link = new LinkedListNode();
    last = current.link;
    last.number = 9;

    LinkedListNode first = new LinkedListNode();
    last.link = first;
    first.number = 9;
    first.character = 'h';
    first.link = current;

Expression:

1) first.link.number

2) first.link.link.character
3) first.link == last
4) current.link.number
5) first == last.link
6) first.number < first.link.number

Explanation / Answer

current [37, ‘z’] -> last[9] -> first [9, ‘h’] -> current

1) Since

LinkedListNode first = new LinkedListNode();

first.link = current;

current.number = 37;

hence first.link.number is 37

2) Since first.link.link is last but last has no character hence answer is nothing. I mean blank

3) false (because first.link is current)

4) 9 (Since current.link is last and last.number is 9)

5) true (see 1st line diagram)

6) true (since first.number = 9 and first.link.number = 37)

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