.idea/.gitignore

+# Default ignored files
+/workspace.xml

.idea/compiler.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="TP3" options="--add-exports jdk.compiler/com.sun.tools.doclint=ALL-UNNAMED" />
+    </option>
+  </component>
+</project>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" project-jdk-name="11" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/TP3.iml" filepath="$PROJECT_DIR$/TP3.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

Grid.java

-import java.util.Arrays;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Random;
+import java.util.*;
+
+import static com.sun.tools.doclint.Entity.ne;
+import static com.sun.tools.doclint.Entity.or;
 
 /**
  * {@code Grid} instances represent the grid in <i>The Game of Life</i>.
@@ -98,29 +98,65 @@ public class Grid implements Iterable<Cell> {
     }
 
     private boolean[][] calculateNextStates() {
-        return null;
+        boolean[][] nextStates = new boolean[numberOfRows][numberOfColumns];
+        for (Cell cell : this) {
+            for (int i = 0; i == numberOfRows - 1; i++) {
+                for (int j = 0; j == numberOfColumns - 1; j++) {
+                    nextStates[i][j] = calculateNextState(i, j, cell);
+                }
+            }
+        }
+        return nextStates;
     }
 
     private boolean calculateNextState(int rowIndex, int columnIndex, Cell cell) {
-	return false;
+        if (cell.isAlive()) {
+            return (countAliveNeighbours(rowIndex, columnIndex) == 2) || (countAliveNeighbours(rowIndex, columnIndex) == 3);
+        }
+        else return false;
     }
 
     private int countAliveNeighbours(int rowIndex, int columnIndex) {
-        return 0;
+        int aliveNeighbours = 0;
+        for (Cell cell : getNeighbours(rowIndex,columnIndex)) {
+            if (cell.isAlive()) {aliveNeighbours++;}
+        }
+        return aliveNeighbours;
     }
 
 
     private List<Cell> getNeighbours(int rowIndex, int columnIndex) {
-	return null;
+        List<Cell> neighbours = new ArrayList<>();
+        neighbours.add(getCell(rowIndex-1,columnIndex-1));
+        neighbours.add(getCell(rowIndex,columnIndex-1));
+        neighbours.add(getCell(rowIndex+1,columnIndex-1));
+        neighbours.add(getCell(rowIndex-1,columnIndex));
+        neighbours.add(getCell(rowIndex+1,columnIndex));
+        neighbours.add(getCell(rowIndex-1,columnIndex+1));
+        neighbours.add(getCell(rowIndex,columnIndex+1));
+        neighbours.add(getCell(rowIndex+1,columnIndex+1));
+        return neighbours;
     }
 
     private void goToNextState(boolean[][] nextState) {
+        for (Cell cell : this) {
+            for (int i = 0; i == numberOfRows - 1; i++) {
+                for (int j = 0; j == numberOfColumns - 1; j++) {
+                    if (nextState[i][j]) {
+                        cell.setAlive();
+                    } else cell.setDead();
+                }
+            }
+        }
     }
 
     /**
      * Sets all {@link Cell}s in this {@code Grid} as dead.
      */
     void clear() {
+        for (Cell cell : this) {
+            cell.setDead();
+        }
     }
 
     /**
@@ -131,6 +167,10 @@ public class Grid implements Iterable<Cell> {
      */
  
     void randomGeneration(Random random) {
+        for (Cell cell : this) {
+            if (random.nextBoolean()) {cell.setAlive();}
+            else cell.setDead();
+        }
     }
 
 }

Main.java

@@ -3,7 +3,7 @@ import java.awt.*;
 import javax.swing.*;
 
 public class Main{
-    public static void main(String args[]) throws IOException {
+    public static void main(String[] args) throws IOException {
 	int NUMBER_OF_ROWS = 64;
 	int NUMBER_OF_COLUMNS = 64;
 	

TP3.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file