• How to write a program called CommandLine that uses a for-each loop to output each command line argument, one per line. For example,

$ java CommandLine apple ball cat

apple

ball

cat

$ java CommandLine "Mr Wuf" "Mrs Wuf"

Mr Wuf

Mrs Wuf

How to write a program called Grades program in which the name of a student and one or more grades are entered on the command line. If there are less than 2 command line arguments, print a "Usage message" as shown below:

$ java Grades

Usage: java Grades name grade1 [grade2 ...]

$ java Grades Billy

Usage: java Grades name grade1 [grade2 ...]

If there are 2 or more command line arguments, you may assume that the first is the student's name and the following command line arguments are Strings that can be converted into integers. Output the student's name and the average of their grades (with 2 decimal places) as shown in the examples below:

$ java Grades Tonya 94

Tonya: 94.00

$ java Grades "Jesse Jones"98 78 89 70

Jesse Jones: 83.75

• Complete the Append program below that contains an append() method that creates and returns a new array that contains the contents of the first array followed by the second array. :

import java.util.*;

public class Append {

public static void main(String[] args) {

Scanner scnr = new Scanner(System.in);

int[] a = {2, 4, 6};

int[] b = {1, 3};

int[] c = append(a, b);

System.out.println(Arrays.toString(c));

int[] d = {23, 89, 107, 54};

int[] e = {101, 42, 34, 67, 91, 99};

int[] f = append(d, e);

System.out.println(Arrays.toString(f));

}

public static int[] append(int[] first, int[] second) {

//Add code here

}

}

• Here is the expected program output:

$ java Append

[2, 4, 6, 1, 3]

[23, 89, 107, 54, 101, 42, 34, 67, 91, 99]

Complete the MultiplicationTable program below that contains methods that create multiplication tables with a given number of rows and columns and prints them.

public class MultiplicationTable {

public static void main(String[] args) {

System.out.println();

int[][] smallTable = createMultiplicationTable(3);

printMultiplicationTable(smallTable);

System.out.println();

int[][] largeTable = createMultiplicationTable(10);

printMultiplicationTable(largeTable);

}

return a multiplication table witn n rows and n columns

//HINT: Set each array value to (i + 1) * (j + 1), where i and j

//represent the ith row and jth col.

public static int[][] createMultiplicationTable(int n) {

//Add code here

}

//Print multiplication table using %4d to print each value

public static void printMultiplicationTable(int[][] table) {

//Add code here

}

}

Here is the expected program output:

$ java MultiplicationTable

1 2 3

2 4 6

3 6 9

1 2 3 4 5 6 7 8 9 10

2 4 6 8 10 12 14 16 18 20

3 6 9 12 15 18 21 24 27 30

4 8 12 16 20 24 28 32 36 40

5 10 15 20 25 30 35 40 45 50

6 12 18 24 30 36 42 48 54 60

7 14 21 28 35 42 49 56 63 70

8 16 24 32 40 48 56 64 72 80

9 18 27 36 45 54 63 72 81 90

10 20 30 40 50 60 70 80 90 100