JAVA!!! UTF8 Please don\'t change the method type or use additional import state

Question

JAVA!!! UTF8

Please don't change the method type or use additional import statements. Two methods before main need to be written.

Thank you!

import java.util.Scanner;
import java.util.Random;
import java.lang.StringBuilder;

public class Battleship {

public static int coordAlphaToNum(String coord) {
int ret = 0, mul = 1;
coord = coord.toUpperCase();
for(int i = coord.length() - 1; i >= 0; i--){
ret += ((int)coord.charAt(i) - (int)'A') * mul;
mul *= 26; //pow is not necessary in this simple version, saves time complexity
}
return ret;
}

public static String coordNumToAlpha(int coord) {
String ret = "";
while(coord > 0){
int mod = coord % 26;
coord /= 26;
ret += (char)('A' + mod);   
}
return new StringBuilder(ret).reverse().toString();
}

public static int promptInt(Scanner sc, String valName, int min, int max) {
System.out.print("Enter the " + valName + " (" + min + " to " + max + "): ");
int line = sc.nextInt();

if(min <= line && line <= max)
return line;
else{
System.out.println("Invalid value.");
return promptInt(sc, valName, min, max);
}
}

public static String promptStr(Scanner sc, String valName, String min, String max) {
System.out.print("Enter the " + valName + " (" + min + " to " + max + "): ");
String line = sc.nextLine();
line = line.trim(); //trim spaces leading and trailing

String min_ = min.toUpperCase(); //for ignoring case
String max_ = max.toUpperCase();
line = line.toUpperCase();
if(min_.compareTo(line) <= 0 && line.compareTo(max_) <= 0)
return line;
else{
System.out.println("Invalid value.");
return promptStr(sc, valName, min, max);
}
}


/**
* Initializes a game board so that all the entries are Config.WATER_CHAR.
*
* @param board The game board to initialize.
*/
public static void initBoard(char board[][]) {
//FIXME
}

/**
* Prints the game boards as viewed by the user. This method is used to print the
* game boards as the user is placing their ships and during the game play.
*
* Some notes on the display:
* - Each column printed will have a width of Config.MAX_COL_WIDTH.
* - Each row is followed by an empty line.
* - The values in the headers and cells are to be right justified.
*
* @param board The board to print.
* @param caption The board caption.
*/
public static void printBoard(char board[][], String caption) {
//FIXME
}

public static void main(String[] args) {
  
System.out.println("Welcome to Battleship!");
Scanner sc = new Scanner(System.in);
  
char again = 'y';
while(again == 'y' || again == 'Y'){
promptInt(sc, "board height", Config.MIN_HEIGHT, Config.MAX_HEIGHT);
promptInt(sc, "board width", Config.MIN_WIDTH, Config.MAX_WIDTH);

System.out.print(" Would you like to play again? (y/n): ");
again = sc.next().charAt(0);
}
System.out.println("Thanks for playing!");
}

public class Config {

/**
* Minimum and maximum values used in the program
*/
public static final int MIN_WIDTH = 1; //Minimum number of columns
public static final int MAX_WIDTH = 675; //Maximum number of columns
public static final int MIN_HEIGHT = 1; //Minimum number of rows
public static final int MAX_HEIGHT = 99; //Maximum number of rows
public static final int MAX_COL_WIDTH = 3; //Maximum number of characters per column
public static final int MIN_SHIPS = 1; //Minimum number of ships
public static final int MAX_SHIPS = 9; //Maximum number of ships
public static final int MIN_SHIP_LEN = 1; //Minimum ship length

/**
* Character values for displaying the different statuses of the game board cells.
*/
public static final char WATER_CHAR = '~'; // Water character (not yet targeted)
public static final char HIT_CHAR = '*'; // Hit character
public static final char MISS_CHAR = '@'; // Miss character

/**
* Constants for the random processes.
*/
public static final long SEED = 1234; // The random seed
public static final int RAND_SHIP_TRIES = 20; // Maximum number of tries to place a ship
  
}
}

SAMPLE OUTPUT:
Welcome to Battleship!
Enter the board height (1 to 99): 8
Enter the board width (1 to 675): 5

Enter the number of ships (1 to 9): 3
My Ships:   
A B C D E
0 ~ ~ ~ ~ ~

1 ~ ~ ~ ~ ~

2 ~ ~ ~ ~ ~

3 ~ ~ ~ ~ ~

4 ~ ~ ~ ~ ~

5 ~ ~ ~ ~ ~

6 ~ ~ ~ ~ ~

7 ~ ~ ~ ~ ~

Vertical or horizontal? (v/h): v
Enter the ship length (1 to 8): 3
Enter the x-coord (A to E): C
Enter the y-coord (0 to 5): 3
My Ships:   
A B C D E
0 ~ ~ ~ ~ ~

1 ~ ~ ~ ~ ~

2 ~ ~ ~ ~ ~

3 ~ ~ 1 ~ ~

4 ~ ~ 1 ~ ~

5 ~ ~ 1 ~ ~

6 ~ ~ ~ ~ ~

7 ~ ~ ~ ~ ~

Vertical or horizontal? (v/h): H
Enter the ship length (1 to 5): 4
Enter the x-coord (A to B): A
Enter the y-coord (0 to 7): 0
My Ships:   
A B C D E
0 2 2 2 2 ~

1 ~ ~ ~ ~ ~

2 ~ ~ ~ ~ ~

3 ~ ~ 1 ~ ~

4 ~ ~ 1 ~ ~

5 ~ ~ 1 ~ ~

6 ~ ~ ~ ~ ~

7 ~ ~ ~ ~ ~

Vertical or horizontal? (v/h): v
Enter the ship length (1 to 8): 5
Enter the x-coord (A to E): e
Enter the y-coord (0 to 3): 2
Would you like to play again? (y/n): y
Enter the board height (1 to 99): 2
Enter the board width (1 to 675): 1

Enter the number of ships (1 to 9): 1
My Ships:
A
0 ~

1 ~

Vertical or horizontal? (v/h): h
Enter the ship length (1 to 1): 1
Enter the x-coord (A to A): a
Enter the y-coord (0 to 1): 1
Would you like to play again? (y/n): w
Thanks for playing!

Explanation / Answer

import java.util.Scanner; import java.util.Random; import java.lang.StringBuilder; public class Battleship { public static int coordAlphaToNum(String coord) { int ret = 0, mul = 1; coord = coord.toUpperCase(); for(int i = coord.length() - 1; i >= 0; i--){ ret += ((int)coord.charAt(i) - (int)'A') * mul; mul *= 26; //pow is not necessary in this simple version, saves time complexity } return ret; } public static String coordNumToAlpha(int coord) { String ret = ""; while(coord > 0){ int mod = coord % 26; coord /= 26; ret += (char)('A' + mod); } return new StringBuilder(ret).reverse().toString(); } public static int promptInt(Scanner sc, String valName, int min, int max) { System.out.print("Enter the " + valName + " (" + min + " to " + max + "): "); int line = sc.nextInt(); if(min

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