Compléter la classe ListMatrix

src/main/java/matrix/ListMatrix.java

 package matrix;
 
+import java.util.ArrayList;
 import java.util.List;
 
 
@@ -23,10 +24,9 @@ public class ListMatrix<T> implements Matrix<T> {
    * @param initializer A matrix initializer to set values in the {@link ListMatrix}.
    */
   public ListMatrix(int width, int height, MatrixInitializer<T> initializer) {
-    // TODO
-    this.width = 0;
-    this.height = 0;
-    this.matrix = null;
+    this.width = width;
+    this.height = height;
+    this.matrix = new ArrayList<>(width);
     this.initializeWith(initializer); // fills the matrix using initializer
   }
 
@@ -35,29 +35,33 @@ public class ListMatrix<T> implements Matrix<T> {
   }
 
   private void initializeWith(MatrixInitializer<T> initializer) {
-    // TODO initialize each cell of the matrix, with a value determined by initializer
+    for (int x=0; x<width; x++) {
+      List<T> column = new ArrayList<>(height);
+      for (int y=0; y<height; y++) {
+        column.add(initializer.initialValueAt(new Coordinate(x, y)));
+      }
+      matrix.add(column);
+    }
+
   }
 
   public int width() {
-    // TODO
-    return 0;
+    return width;
   }
 
   public int height() {
-    // TODO
-    return 0;
+    return height;
   }
 
   @Override
-  public T get(int x, int y) {
-    // TODO
-    return null;
+  public T get(int x, int y) { // une liste de listes
+    return matrix.get(x).get(y);
   }
 
 
   @Override
   public void set(int x, int y, T newValue) {
-    // TODO
+    matrix.get(x).set(y,newValue);
   }
 
 }