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java code.

empty (boolean flag): requires: none. input: none. results: if the number of

elements in L is zero, then flag is set to true otherwise false. output: flag.

• full (boolean flag): requires: none. input: none. results: if the number of elements

in L has reached the maximum then flag is set to true otherwise false. output: flag.

• findFirst ( ): requires: list L is not empty. input: none. results: first element set

as the current element. output: none.

• findNext ( ): requires: list L is not empty. Current is not last. input: none.

results: element following the current element is made current. output: none.

• last (boolean flag): requires: L is not empty. input: none. results: if the last

element is the current element then flag is set to true otherwise false. output: flag.

• retrieve (Type e): requires: list L is not empty. input: none. results: current

element is copied into e. output: element e.

• update (Type e): requires: list L is not empty. input: e. results: the element e

is copied into the current node. output: none.

• insert (Type e): requires: list L is not full. input: e. results: a new node

containing element e is created and inserted after the current element in the list.

The new element e is made the current element. If the list is empty e is also made

the head element. output: none.

2

• remove ( ): requires: list L is not empty. input: none. results: the current

element is removed. If L is empty, current will point to null. If the next element

exists, it is made current, else the first element is made current. output: none.

New methods:

• insertBefore(T e): requires: list L is not full. input: e. results: a new node

containing element e is created and inserted before the current element in the list.

The new element e is made the current element. If the list is empty e is inserted at

the beginning and also made the head element. output: none

2. Write a class called ListUtils having the following static methods:

(a) public static List<Integer> insertInOrder(List<Integer> l, Integer a): A static method

that inserts an Integer a into the list of integers l. The input list l is assumed to be

in increasing order and must remain that way after inserting a.

(b) public static List<Integer> readValues(String fileName): A static method that reads

integer values from a file fileName and inserts them into a list in increasing order.

The method should return the created list. You may choose ArrayList or LinkedList

to build your List.

(c) public static List<Integer> merge(List<Integer> l1, List<Integer> l2): A static method

that merges the two lists l1 and l2, which are given in increasing order, and returns

the newly created list which must also be in increasing order.

Skills: Java, JavaFX, Javascript, PHP, Software Architecture

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