Cell.java

@@ -4,9 +4,11 @@
 
 public class Cell {
     private boolean isAlive;
+    private boolean isBlue;
 
     public Cell() {
         this.isAlive = false;
+        this.isBlue = false;
     }
 
     /**
@@ -19,6 +21,10 @@ public class Cell {
         return this.isAlive;
     }
 
+    public boolean isBlue() {
+        return this.isBlue;
+    }
+
     /**
      * Determines whether this {@link Cell} is dead or not.
      *
@@ -29,6 +35,10 @@ public class Cell {
         return !this.isAlive;
     }
 
+    public boolean isRed() {
+        return !this.isBlue;
+    }
+
     /**
      * Sets the state of this {@link Cell} to alive.
      *
@@ -39,6 +49,11 @@ public class Cell {
         this.isAlive = true;
     }
 
+    public void setBlue() {
+        this.isBlue = true;
+    }
+
+
     /**
      * Sets the state of this {@link Cell} to dead.
      *
@@ -49,6 +64,10 @@ public class Cell {
         this.isAlive = false;
     }
 
+    public void setRed() {
+        this.isBlue = false;
+    }
+
 
     /**
      * Change the state of this {@link Cell} from ALIVE to DEAD or from DEAD to ALIVE.
@@ -67,8 +86,7 @@ public class Cell {
                 return true;
             else
                 return false;
-	}
-	else{
+        } else {
             if (numberOfAliveNeighbours == 3)
                 return true;
             else

GameOfLifeGUI.java

@@ -17,16 +17,23 @@ public class GameOfLifeGUI extends JFrame {
         gridLayout = new GridLayout(numberOfRows, numberOfColumns);
         gridPanel = new JPanel(gridLayout);
         labelGrid = new JLabel[numberOfRows][numberOfColumns];
-        for (int x = 0; x < numberOfColumns; x++)
+        for (int x = 0; x < numberOfColumns; x++) {
             for (int y = 0; y < numberOfRows; y++) {
                 labelGrid[x][y] = new JLabel("*");
                 JLabel label;
-		if(g.getCell(x,y).isAlive())
+                if (g.getCell(x, y).isAlive()) {
+                    if (g.getCell(x, y).isRed()) {
                         labelGrid[x][y].setForeground(Color.red);
-		else
+                    } else {
+                        labelGrid[x][y].setForeground(Color.blue);
+                    }
+                } else {
                     labelGrid[x][y].setForeground(Color.white);
+                }
                 gridPanel.add(labelGrid[x][y]);
             }
+        }
+
         frame = new JFrame("Game of Life");
         frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
         frame.setContentPane(gridPanel);
@@ -36,13 +43,19 @@ public class GameOfLifeGUI extends JFrame {
     }
 
     public void update(Grid g) {
-        for (int x = 0; x < numberOfColumns; x++)
+        for (int x = 0; x < numberOfColumns; x++) {
             for (int y = 0; y < numberOfRows; y++) {
                 JLabel label = labelGrid[x][y];
-		if(g.getCell(x,y).isAlive())
+                if (g.getCell(x, y).isAlive()) {
+                    if (g.getCell(x, y).isBlue()) {
+                        label.setForeground(Color.blue);
+                    } else {
                         label.setForeground(Color.red);
-		else
+                    }
+                } else {
                     label.setForeground(Color.white);
                 }
             }
         }
+    }
+}

Grid.java

-import java.util.Arrays;
+import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Random;
@@ -98,29 +98,110 @@ public class Grid implements Iterable<Cell> {
     }
 
     private boolean[][] calculateNextStates() {
-        return null;
+        boolean[][] states = new boolean[numberOfRows][numberOfColumns];
+        for (int i = 0; i < numberOfRows; i++) {
+            for (int j = 0; j < numberOfColumns; j++) {
+                states[i][j] = calculateNextState(i, j, cells[i][j]);
+            }
+        }
+
+        return states;
     }
 
     private boolean calculateNextState(int rowIndex, int columnIndex, Cell cell) {
-	return false;
+        int neighboursAlive = countAliveNeighbours(rowIndex, columnIndex);
+        int blueNeighbours = countBlueNeighbours(rowIndex, columnIndex);
+        boolean nextStateAlive = cell.isAlive();
+        if (cell.isAlive()) {
+            if (neighboursAlive == 2) {
+                nextStateAlive = true;
+            }
+            else if (neighboursAlive == 3) {
+                nextStateAlive = true;
+            }
+            else {
+                cell.isDead();
+                nextStateAlive = false;
+            }
+        }
+        else if (cell.isDead()) {
+            if (neighboursAlive == 3) {
+                cell.isAlive();
+                nextStateAlive = true;
+                if (blueNeighbours >= 2) {
+                    cell.setBlue();
+                }
+                else {
+                    cell.setRed();
+                }
+            }
+            else {
+                nextStateAlive = false;
+            }
+        }
+
+
+        return nextStateAlive;
     }
 
     private int countAliveNeighbours(int rowIndex, int columnIndex) {
-        return 0;
+        int nbAlive = 0;
+        for (Cell cell : getNeighbours(rowIndex, columnIndex)) {
+            nbAlive += cell.isAlive() ? 1 : 0;
+        }
+        return nbAlive;
+    }
+
+    private int countBlueNeighbours(int rowIndex, int columnIndex) {
+        int nbBlue = 0;
+        for (Cell cell : getNeighbours(rowIndex, columnIndex)) {
+            if (cell.isAlive()) {
+                nbBlue += cell.isBlue() ? 1 : 0;
+
+            }
+        }
+        return nbBlue;
     }
 
 
     private List<Cell> getNeighbours(int rowIndex, int columnIndex) {
-	return null;
+        List<Cell> neighbourCells = new ArrayList<Cell>();
+        neighbourCells.add(cells[rowIndex - 1 < 0 ? numberOfRows - 1 : rowIndex - 1][columnIndex - 1 < 0 ? numberOfColumns - 1 : columnIndex - 1]);
+        neighbourCells.add(cells[rowIndex][columnIndex - 1 < 0 ? numberOfColumns - 1 : columnIndex - 1]);
+        neighbourCells.add(cells[rowIndex + 1 > numberOfRows - 1 ? 0 : rowIndex + 1][columnIndex - 1 < 0 ? numberOfColumns - 1 : columnIndex - 1]);
+
+        neighbourCells.add(cells[rowIndex - 1 < 0 ? numberOfRows - 1 : rowIndex - 1][columnIndex]);
+        neighbourCells.add(cells[rowIndex + 1 > numberOfRows - 1 ? 0 : rowIndex + 1][columnIndex]);
+
+        neighbourCells.add(cells[rowIndex - 1 < 0 ? numberOfRows - 1 : rowIndex - 1][columnIndex + 1 > numberOfColumns - 1 ? 0 : columnIndex + 1]);
+        neighbourCells.add(cells[rowIndex][columnIndex + 1 > numberOfColumns - 1 ? 0 : columnIndex + 1]);
+        neighbourCells.add(cells[rowIndex + 1 > numberOfRows - 1 ? 0 : rowIndex + 1][columnIndex + 1 > numberOfColumns - 1 ? 0 : columnIndex + 1]);
+
+        return neighbourCells;
     }
 
     private void goToNextState(boolean[][] nextState) {
+        for (int i = 0; i < numberOfRows; i++) {
+            for (int j = 0; j < numberOfColumns; j++) {
+                if (nextState[i][j] == true) {
+                    cells[i][j].setAlive();
+                } else {
+                    cells[i][j].setDead();
+                }
+            }
+        }
+
     }
 
     /**
      * Sets all {@link Cell}s in this {@code Grid} as dead.
      */
     void clear() {
+        for (int i = 0; i < numberOfRows; i++) {
+            for (int j = 0; j < numberOfColumns; j++) {
+                cells[i][j].setDead();
+            }
+        }
     }
 
     /**
@@ -131,6 +212,21 @@ public class Grid implements Iterable<Cell> {
      */
 
     void randomGeneration(Random random) {
+        for (int i = 0; i < numberOfRows; i++) {
+            for (int j = 0; j < numberOfColumns; j++) {
+                if (random.nextBoolean()) {
+                    cells[i][j].setAlive();
+                    if (random.nextBoolean()) {
+                        cells[i][j].setBlue();
+                    } else {
+                        cells[i][j].setRed();
+                    }
+                } else {
+                    cells[i][j].setDead();
+
+                }
+            }
+        }
     }
 
 }

Main.java

@@ -17,6 +17,7 @@ public class Main{
 			} catch (InterruptedException ie) {
 
 			}
+
 			gameOfLife.next();
 			gui.update(gameOfLife.getGrid());
 		}