please write down both java and output. Thank you!
Homework Answers
Here is the code for the question with output. In case of any issues, post a comment. If happy with the answer, please rate it. Thank you
Chip.java
public class Chip {
public static final String RED = "RED";
public static final String YELLOW = "YELLOW";
private String colour;
public Chip(String c)
{
colour = c;
}
public boolean equals(Chip c)
{
if(c == null)
return false;
if(c.colour.equalsIgnoreCase(colour))
return true;
else
return false;
}
public void setColour(String c)
{
colour = c;
}
public String getColour()
{
return colour;
}
public String toString()
{
return colour.charAt(0)+"";
}
}
Board.java
public class Board {
private int rows;
private int cols;
protected Chip[][] board;
public Board(int r, int c)
{
rows = r;
cols = c;
board = new Chip[rows][cols];
}
public int getRows()
{
return rows;
}
public int getCols()
{
return cols;
}
public boolean isEmpty(int r, int c)
{
return (board[r][c] == null);
}
public boolean add(int r, int c, Chip chip)
{
if(isEmpty(r, c))
{
board[r][c] = chip;
return true;
}
else
return false;
}
}
Connect4Board.java
public class Connect4Board extends Board {
private Chip winner;
public Connect4Board()
{
super(6, 7);
}
public boolean add(int c, String colour)
{
//check for empty row from bottom in the column c
for(int r = 5; r >= 0; r--)
{
if(isEmpty(r, c))
{
add(r, c, new Chip(colour));
return true;
}
}
return false;
}
public String winType()
{
int total = 0;
for( int r = 0; r < getRows(); r++)
{
for(int c = 0; c < getCols(); c++)
{
if(board[r][c] == null) continue;
winner = board[r][c];
//for each of the current location of r,c , check 8 different directions to see if
//4 were connected in that direction
//check +ve x horizontal direction
total = 0;
for(int i = 0; i < 4 && c+i < getCols(); i++)
{
if(board[r][c].equals(board[r][c+i]) )
total++;
}
if(total == 4)
return "Horizontal";
//check -ve horizontal direction
total = 0;
for(int i = 0; i < 4 && c-i >= 0; i++)
{
if(board[r][c].equals(board[r][c-i] ))
total++;
}
if(total == 4)
return "Horizontal";
//check +ve vertical direction
total = 0;
for(int i = 0; i < 4 && r-i >= 0; i++)
{
if(board[r][c].equals(board[r - i][c] ))
total++;
}
if(total == 4)
return "Vertical";
//check -ve vertical direction
total = 0;
for(int i = 0; i < 4 && r+i < getRows(); i++)
{
if(board[r][c].equals(board[r + i][c]) )
total++;
}
if(total == 4)
return "Vertical";
//check diagonal 1 quadrant
total = 0;
for(int i = 0; i < 4 && r-i >= 0 && c+i < getCols(); i++)
{
if(board[r][c].equals(board[r - i][c + i] ))
total++;
}
if(total == 4)
return "Diagonal";
//check diagonal 2nd quadrant
total = 0;
for(int i = 0; i < 4 && r - i >= 0 && c - i >= 0; i++)
{
if(board[r][c].equals(board[r - i][c - i] ))
total++;
}
if(total == 4)
return "Diagonal";
//check diagonal 3rd quadrant
total = 0;
for(int i = 0; i < 4 && r + i < getRows() && c - i >= 0; i++)
{
if(board[r][c].equals(board[r + i][c - i] ))
total++;
}
if(total == 4)
return "Diagonal";
//check diagonal 4th quadrant
total = 0;
for(int i = 0; i < 4 && r + i < getRows() && c + i < getCols(); i++)
{
if(board[r][c].equals(board[r + i][c + i] ))
total++;
}
if(total == 4)
return "Diagonal";
}
}
winner = null;
return null;
}
public boolean winner()
{
if(winType() == null)
return false;
else
return true;
}
public boolean isFull()
{
for(int i = 0; i < getRows(); i++)
{
for(int j = 0; j < getCols(); j++)
if(board[i][j] == null)
return false;
}
return true;
}
public Chip getWinningChip()
{
return winner;
}
public String toString()
{
String str ="\n";
for(int i = 1 ; i <= getCols(); i ++)
str += "\t" + i;
for(int r = 0; r < getRows(); r++)
{
str += "\n" + (r+1) ;
for(int c = 0; c < getCols(); c++)
{
str += "\t" ;
if(board[r][c] == null)
str += " ";
else
str += board[r][c];
}
str += "\n";
}
return str;
}
}
Play.java
import java.util.Scanner;
public class Play {
public static void main(String[] args) {
Scanner keybd = new Scanner(System.in);
String ans;
do
{
String player1, player2;
int totalTurns = 0;
int currTurn = 0;
System.out.println("Welcome to Connect 4. Please enter your names.");
System.out.print("Player 1 name: ");
player1 = keybd.nextLine().trim();
System.out.print("Player 2 name: ");
player2 = keybd.nextLine().trim();
System.out.println(player1 + " - You have red chips \"R\" and you go first");
System.out.println(player2 + " - You have yellow chips \"Y\" and you go second");
Connect4Board board = new Connect4Board();
String currChip = Chip.RED;
int col;
while(!board.isFull() && board.winner() == false)
{
System.out.println(board);
do{
System.out.print("\n"+ currChip + " - Please input a column # between 1-7: ");
col = keybd.nextInt();
}while(col < 1 || col > 7);
if(board.add(col - 1, currChip))
{
totalTurns++;
//change turn and colours
if(currChip.equals(Chip.RED))
currChip = Chip.YELLOW;
else
currChip = Chip.RED;
}
else
System.out.println("Chip could not be added in the column. Try another column!");
}
Chip winner = board.getWinningChip();
if(winner == null)
System.out.println("There is no winner");
else
{
if(winner.getColour() == Chip.RED)
System.out.println("RED - Connect 4 ! Congratulations " + player1 + "! You win in " + totalTurns + " turns");
else
System.out.println("YELLOW - Connect 4 ! Congratulations " + player2 + "! You win in " + totalTurns + " turns");
}
System.out.print("\n\nDo you want to play again ? y/n: ");
ans = keybd.next().trim();
}while(ans.equalsIgnoreCase("y"));
}
}
output
Welcome to Connect 4. Please enter your names.
Player 1 name: Bob
Player 2 name: Jane
Bob - You have red chips "R" and you go first
Jane - You have yellow chips "Y" and you go second
1 2 3 4 5 6 7
1
2
3
4
5
6
RED - Please input a column # between 1-7: 1
1 2 3 4 5 6 7
1
2
3
4
5
6 R
YELLOW - Please input a column # between 1-7: 2
1 2 3 4 5 6 7
1
2
3
4
5
6 R Y
RED - Please input a column # between 1-7: 1
1 2 3 4 5 6 7
1
2
3
4
5 R
6 R Y
YELLOW - Please input a column # between 1-7: 1
1 2 3 4 5 6 7
1
2
3
4 Y
5 R
6 R Y
RED - Please input a column # between 1-7: 3
1 2 3 4 5 6 7
1
2
3
4 Y
5 R
6 R Y R
YELLOW - Please input a column # between 1-7: 2
1 2 3 4 5 6 7
1
2
3
4 Y
5 R Y
6 R Y R
RED - Please input a column # between 1-7: 1
1 2 3 4 5 6 7
1
2
3 R
4 Y
5 R Y
6 R Y R
YELLOW - Please input a column # between 1-7: 2
1 2 3 4 5 6 7
1
2
3 R
4 Y Y
5 R Y
6 R Y R
RED - Please input a column # between 1-7: 4
1 2 3 4 5 6 7
1
2
3 R
4 Y Y
5 R Y
6 R Y R R
YELLOW - Please input a column # between 1-7: 2
YELLOW - Connect 4 ! Congratulations Jane! You win in 10 turns
Do you want to play again ? y/n: n
Add Answer to:
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