A11 ‣ Lambda Expressions – Intermediate Programming

Create a directory in your repository named a11 and include all of the files for this assignment in the a11 directory.

Create a class named Driver that includes the following interfaces:

interface MatrixGen {
    Integer[][] generate(int m, int n);
}

interface MatrixSet {
    Integer[][] set(int m, int n, String pattern);
}

interface MatrixClone {
    Integer[][] clone(Integer[][] matrix);
}

interface MatrixPrint {
    void print(Integer[][] matrix);
}

interface MatrixCompare {
    int compare(Integer[][] matrix1, Integer[][] matrix2);
}

In your driver class, create instances of the above interfaces using lambda expressions. You are not allowed to use methods that have been deprecated in Java 9.

The generate method should create an m x n matrix of Integer objects, each with the value of 0. We’ll assume n and m are non-negative integers.
The set method should create an m x n matrix of Integer objects with each object having the value of a digit (0-9) specified in the String pattern. For example, if pattern is “000111000” the corresponding matrix would be

000
111
000

If the pattern contains non-digit characters the method should return a 0 x 0 Integer matrix. If the length of the pattern is not equal to n x m, the method should return a 0 x 0 Integer matrix. We’ll assume n and m are non-negative integers.

The clone method should return an exact copy of the matrix that is passed in as an argument. If either dimension of argument is 0 then the method should return a 0 x 0 Integer matrix.
The print method should print the matrix to the console with each row on a separate line.
The compare method should return:
- -1 if the sum of the Integers in m1 is less than the sum of the Integers in m2
- 0 if the sum of the Integers in m1 is equal to the sum of the Integers in m2
- 1 if the sum of the Integers in m1 is greater than the sum of the Integers in m2