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Maze Generator
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Maze Generator
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import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//This maze is generated and solved assuming that the generator and solver/user is always facing down and just steps the directions, but does not turn
public class Adventure extends JFrame implements ActionListener
{
/**
*
*/
private static final long serialVersionUID = 1L;
//Class level variables
static final int left = 0;
static final int forward = 1;
static final int right = 2;
static final int backward = 3;
static final int mazeSize = 20;
int[][] maze = new int[mazeSize][mazeSize]; //All elements in 2D array are initialized to zero
Random randGenerator = new Random();
int startLocation = ((mazeSize-1) / 2) + randGenerator.nextInt(2);
Location currPlayerLocation = new Location(1, startLocation);
int endLocationRow;
int endLocationColumn;
//GUI class level variables
Container mainPanel;
JPanel pnlCenterDisplay;
JLabel lblStartText;
JLabel lblDisplayText;
JButton btnRestart;
JButton btnForward;
JButton btnBackward;
JButton btnRight;
JButton btnLeft;
public static void main(String[] args)
{
new Adventure();
}//End main
public Adventure()
{
generateMaze();
setupGUI();
}//End Adventure constructor
public void setupGUI()
{
//Setup the GUI
//Setup the buttons and CenterPanel
pnlCenterDisplay = new JPanel();
lblStartText = new JLabel("<HTML>Welcome to the Adventure Maze.<BR>"
+ "It is a first person maze crawler.<BR>"
+ "I hope you enjoy it!</HTML>", SwingConstants.CENTER);
lblDisplayText = new JLabel("");
btnRestart = new JButton("Restart");
btnForward = new JButton("Forward");
btnBackward = new JButton("Backward");
btnRight = new JButton("Right");
btnLeft = new JButton("Left");
pnlCenterDisplay.setLayout(new BoxLayout(pnlCenterDisplay, BoxLayout.PAGE_AXIS));
pnlCenterDisplay.add(Box.createRigidArea(new Dimension(0,125)));
lblStartText.setAlignmentX(CENTER_ALIGNMENT);
lblStartText.setAlignmentY(CENTER_ALIGNMENT);
pnlCenterDisplay.add(lblStartText);
lblDisplayText.setAlignmentX(CENTER_ALIGNMENT);
lblDisplayText.setAlignmentY(CENTER_ALIGNMENT);
pnlCenterDisplay.add(lblDisplayText);
btnRestart.setAlignmentX(CENTER_ALIGNMENT);
btnRestart.setAlignmentY(CENTER_ALIGNMENT);
pnlCenterDisplay.add(btnRestart);
//Setup container and layout
mainPanel = this.getContentPane();
mainPanel.setLayout(new BorderLayout());
mainPanel.add(pnlCenterDisplay, BorderLayout.CENTER);
mainPanel.add(btnForward, BorderLayout.NORTH);
mainPanel.add(btnBackward, BorderLayout.SOUTH);
mainPanel.add(btnRight, BorderLayout.EAST);
mainPanel.add(btnLeft, BorderLayout.WEST);
updateGUI();
this.setSize(600, 400);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
btnRestart.setVisible(false);
//Setup ActionListeners
btnRestart.addActionListener(this);
btnForward.addActionListener(this);
btnBackward.addActionListener(this);
btnRight.addActionListener(this);
btnLeft.addActionListener(this);
}//End setupGUI method
public void actionPerformed(ActionEvent e)
{
System.out.println(e.getActionCommand());
//Check button clicks
if(e.getSource() == btnForward)
{
lblStartText.setVisible(false);
currPlayerLocation.setRow(currPlayerLocation.getRow()+1);
//Check for the end
if(currPlayerLocation.getRow() == endLocationRow && currPlayerLocation.getColumn() == endLocationColumn)
{
lblDisplayText.setText("Congratulations! You made it out alive!");
btnRestart.setVisible(true);
btnForward.setVisible(false);
btnBackward.setVisible(false);
btnRight.setVisible(false);
btnLeft.setVisible(false);
}//End if to check for end
else
{
updateGUI();
}//End else to update the GUI
}//End if btnForward
else if(e.getSource() == btnBackward)
{
lblStartText.setVisible(false);
currPlayerLocation.setRow(currPlayerLocation.getRow()-1);
//Check for the end
if(currPlayerLocation.getRow() == endLocationRow && currPlayerLocation.getColumn() == endLocationColumn)
{
lblDisplayText.setText("Congratulations! You made it out alive!");
btnRestart.setVisible(true);
btnForward.setVisible(false);
btnBackward.setVisible(false);
btnRight.setVisible(false);
btnLeft.setVisible(false);
}//End if to check for end
else
{
updateGUI();
}//End else to update the GUI
}//End else if btnBackward
else if(e.getSource() == btnRight)
{
lblStartText.setVisible(false);
currPlayerLocation.setColumn(currPlayerLocation.getColumn()-1);
//Check for the end
if(currPlayerLocation.getRow() == endLocationRow && currPlayerLocation.getColumn() == endLocationColumn)
{
lblDisplayText.setText("Congratulations! You made it out alive!");
btnRestart.setVisible(true);
btnForward.setVisible(false);
btnBackward.setVisible(false);
btnRight.setVisible(false);
btnLeft.setVisible(false);
}//End if check for end
else
{
updateGUI();
}//End else to update the GUI
}//End else if btnRight
else if(e.getSource() == btnLeft)
{
lblStartText.setVisible(false);
currPlayerLocation.setColumn(currPlayerLocation.getColumn()+1);
//Check for the end
if(currPlayerLocation.getRow() == endLocationRow && currPlayerLocation.getColumn() == endLocationColumn)
{
lblDisplayText.setText("Congratulations! You made it out alive!");
btnRestart.setVisible(true);
btnForward.setVisible(false);
btnBackward.setVisible(false);
btnRight.setVisible(false);
btnLeft.setVisible(false);
}//End if to check for end
else
{
updateGUI();
}//End else to update the GUI
}//End else if btnLeft
else if(e.getSource() == btnRestart)
{
//Reset maze to all zeroes
for(int i = 0; i < mazeSize; i++)
{
for(int j = 0; j < mazeSize; j++)
{
maze[i][j] = 0;
}//End j for loop
}//End i for loop
//Regenerate maze, reset player location, and reset GUI
generateMaze();
currPlayerLocation.setRow(1);
currPlayerLocation.setColumn(startLocation);
updateGUI();
btnRestart.setVisible(false);
}//End else it btnRestart
}//End actionPerformed method
public void updateGUI()
{
//Update the GUI buttons
lblDisplayText.setText("Current Location: Row,Column = " + currPlayerLocation.getRow() + "," + currPlayerLocation.getColumn());
try
{
//Check forward
if(maze[currPlayerLocation.getRow()+1][currPlayerLocation.getColumn()] == 0 || maze[currPlayerLocation.getRow()+1][currPlayerLocation.getColumn()] == 2)
{
btnForward.setVisible(false);
}//End if forward
else
{
btnForward.setVisible(true);
}//End else forward
//Check backward
if(maze[currPlayerLocation.getRow()-1][currPlayerLocation.getColumn()] == 0 || maze[currPlayerLocation.getRow()-1][currPlayerLocation.getColumn()] == 2)
{
btnBackward.setVisible(false);
}//End if backward
else
{
btnBackward.setVisible(true);
}//End else backward
//Check right
if(maze[currPlayerLocation.getRow()][currPlayerLocation.getColumn()-1] == 0 || maze[currPlayerLocation.getRow()][currPlayerLocation.getColumn()-1] == 2)
{
btnRight.setVisible(false);
}//End if right
else
{
btnRight.setVisible(true);
}//End else right
//Check left
if(maze[currPlayerLocation.getRow()][currPlayerLocation.getColumn()+1] == 0 || maze[currPlayerLocation.getRow()][currPlayerLocation.getColumn()+1] == 2)
{
btnLeft.setVisible(false);
}//End if left
else
{
btnLeft.setVisible(true);
}//End else left
}//End try
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println(e.getMessage());
}//End catch
}//End updateGUI method
public void generateMaze()
{
//Limit movement options for generation
//Iteration to test cases until all options are eliminated
//Use stack for spiral maze case
//Randomly generates a path from beginning to end
//Declare and initialize/instantiate local variables
boolean keepgoing1 = true;
boolean keepgoing2 = true;
boolean leftChecked = false;
boolean forwardChecked = false;
boolean rightChecked = false;
boolean backwardChecked = false;
int randomDirection = 0;
Stack<Integer> path = new Stack<Integer>();
//Generate the outer walls
for(int i = 0; i < mazeSize; i++)
{
for(int j = 0; j < mazeSize; j++)
{
if(i == 0 || i == (mazeSize-1) || j == 0 || j == (mazeSize-1))
{
maze[i][j] = 2;
}//End if
}//End j for loop
}//End i for loop
//Start near the middle
Location currLocation = new Location(0, startLocation);
maze[currLocation.getRow()][currLocation.getColumn()] = 1;
//Go forward first to get into the maze
currLocation.setRow(currLocation.getRow()+1);
maze[currLocation.getRow()][currLocation.getColumn()] = 1;
//While loop to randomly generate the maze until at the last row
while(keepgoing1)
{
keepgoing2 = true;
leftChecked = false;
forwardChecked = false;
rightChecked = false;
backwardChecked = false;
//While loop to store random number in randomDirection
while(keepgoing2)
{
randomDirection = randGenerator.nextInt(4);
//Determine if direction is possible
//Regenerate random if necessary
//Check if not at edge of maze
if(currLocation.getRow() != 0 && currLocation.getColumn() != 0 && currLocation.getColumn() != (mazeSize-1))
{
if(randomDirection == left)
{
//Check if not already a path
if(maze[currLocation.getRow()][currLocation.getColumn()+1] == 0)
{
currLocation.setColumn(currLocation.getColumn()+1);
maze[currLocation.getRow()][currLocation.getColumn()] = 1;
//Store row then column on a stack
path.push(currLocation.getRow());
path.push(currLocation.getColumn());
keepgoing2 = false;
}//End if not already a path
else
{
leftChecked = true;
}//End else
}//End if left
else if(randomDirection == forward)
{
//Check if not already a path
if(maze[currLocation.getRow()+1][currLocation.getColumn()] == 0)
{
currLocation.setRow(currLocation.getRow()+1);
maze[currLocation.getRow()][currLocation.getColumn()] = 1;
path.push(currLocation.getRow());
path.push(currLocation.getColumn());
keepgoing2 = false;
}//End if not already a path
//Check for the end of the maze
else if(maze[currLocation.getRow()+1][currLocation.getColumn()] == 2)
{
currLocation.setRow(currLocation.getRow()+1);
maze[currLocation.getRow()][currLocation.getColumn()] = 1;
path.push(currLocation.getRow());
path.push(currLocation.getColumn());
endLocationRow = currLocation.getRow();
endLocationColumn = currLocation.getColumn();
keepgoing2 = false;
keepgoing1 = false;
continue;
}//End if
else
{
forwardChecked = true;
}//End else
}//End if forward
else if(randomDirection == right)
{
//Check if not already a path
if(maze[currLocation.getRow()][currLocation.getColumn()-1] == 0)
{
currLocation.setColumn(currLocation.getColumn()-1);
maze[currLocation.getRow()][currLocation.getColumn()] = 1;
path.push(currLocation.getRow());
path.push(currLocation.getColumn());
keepgoing2 = false;
}//End if not already a path
else
{
rightChecked = true;
}//End else
}//End if right
else if(randomDirection == backward)
{
//Check if not already a path
if(maze[currLocation.getRow()-1][currLocation.getColumn()] == 0)
{
currLocation.setRow(currLocation.getRow()-1);
maze[currLocation.getRow()][currLocation.getColumn()] = 1;
path.push(currLocation.getRow());
path.push(currLocation.getColumn());
keepgoing2 = false;
}//End if not already a path
else
{
backwardChecked = true;
}//End else
}//End if backward
}//End if to check for edge of maze
//Check to see if at the last row
for(int i = 0; i < mazeSize; i++)
{
if(maze[mazeSize-1][i] == 1)
{
endLocationRow = mazeSize-1;
endLocationColumn = i;
System.out.println(endLocationRow);
System.out.println(endLocationColumn);
keepgoing2 = false;
keepgoing1 = false;
}//End if statement
}//End i for loop
//Check for spiral and edge of maze, then go back through path
if(maze[currLocation.getRow()][currLocation.getColumn()+1] > 0 &&
maze[currLocation.getRow()+1][currLocation.getColumn()] > 0 &&
maze[currLocation.getRow()][currLocation.getColumn()-1] > 0 &&
maze[currLocation.getRow()-1][currLocation.getColumn()] > 0)
{
if(path.empty())
{
//Check the outside edges to find a path to create an exit
for(int i = 0; i < mazeSize; i++)
{
//Check bottom edge
if(maze[mazeSize-2][i] == 1)
{
maze[mazeSize-1][i] = 1;
endLocationRow = mazeSize - 1;
endLocationColumn = i;
i = mazeSize;
}//End if bottom
//Check left edge
else if(maze[mazeSize-1-i][mazeSize-2] == 1)
{
maze[mazeSize-1-i][mazeSize-1] = 1;
endLocationRow = i;
endLocationColumn = mazeSize - 1;
i = mazeSize;
}//End else if left
//Check right edge
else if(maze[mazeSize-1-i][1] == 1)
{
maze[mazeSize-1-i][0] = 1;
endLocationRow = i;
endLocationColumn = 0;
i = mazeSize;
}//End else if right
//Check top edge
else if(maze[1][i] == 1 && (i != (mazeSize-1)/2 || i != mazeSize/2))
{
maze[0][i] = 1;
endLocationRow = 0;
endLocationColumn = i;
i = mazeSize;
}//End if top edge
}//End check edges for loop
keepgoing1 = false;
keepgoing2 = false;
}//End if path is empty
else
{
currLocation.setColumn(path.pop());
currLocation.setRow(path.pop());
keepgoing2 = false;
}//End else
}//End if to check for spiral
}//End while keepgoing2 loop
}//End while keepgoing1 loop
//Test maze generation
for(int k = 0; k < mazeSize; k++)
{
for(int m = 0; m < mazeSize; m++)
{
System.out.print(maze[k][m]);
}//End m for loop
System.out.print("\n");
}//End k for loop
}//End generateRealPath method
}//End Adventure class
class Location
{
private int row;
private int column;
public Location()
{
row = 0;
column = 0;
}//End null parameter constructor
public Location(int row, int column)
{
this.row = row;
this.column = column;
}//End parameter constructor
public int getRow()
{
return this.row;
}//End getRow method
public void setRow(int row)
{
this.row = row;
}//End setRow method
public int getColumn()
{
return this.column;
}//End getColumn method
public void setColumn(int column)
{
this.column = column;
}//End setColumn method
}//End Location class