feat: add lcci color fill java solution

lcci/08.10.Color Fill/README.md

@@ -42,7 +42,29 @@ sr = 1, sc = 1, newColor = 2
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```java
-
+class Solution {
+    public int[][] floodFill(int[][] image, int sr, int sc, int newColor) {
+        int oldColor = image[sr][sc];
+        dfs(image, sr, sc, oldColor, newColor);
+        return image;
+    }
+
+    private void dfs(int[][] image, int sr, int sc, int oldColor, int newColor) {
+        if (sr < 0 || sc < 0 || sr >= image.length || sc >= image[0].length) {
+            return;
+        }
+
+        int color = image[sr][sc];
+        if (color != newColor && color == oldColor) {
+            image[sr][sc] = newColor;
+            // up down left right
+            dfs(image, sr, sc + 1, oldColor, newColor);
+            dfs(image, sr, sc - 1, oldColor, newColor);
+            dfs(image, sr + 1, sc, oldColor, newColor);
+            dfs(image, sr - 1, sc, oldColor, newColor);
+        }
+    }
+}
 ```
 
 ### ...

lcci/08.10.Color Fill/README_EN.md

@@ -56,7 +56,29 @@ to the starting pixel.</pre>
 ### Java
 
 ```java
-
+class Solution {
+    public int[][] floodFill(int[][] image, int sr, int sc, int newColor) {
+        int oldColor = image[sr][sc];
+        dfs(image, sr, sc, oldColor, newColor);
+        return image;
+    }
+
+    private void dfs(int[][] image, int sr, int sc, int oldColor, int newColor) {
+        if (sr < 0 || sc < 0 || sr >= image.length || sc >= image[0].length) {
+            return;
+        }
+
+        int color = image[sr][sc];
+        if (color != newColor && color == oldColor) {
+            image[sr][sc] = newColor;
+            // up down left right
+            dfs(image, sr, sc + 1, oldColor, newColor);
+            dfs(image, sr, sc - 1, oldColor, newColor);
+            dfs(image, sr + 1, sc, oldColor, newColor);
+            dfs(image, sr - 1, sc, oldColor, newColor);
+        }
+    }
+}
 ```
 
 ### ...

lcci/08.10.Color Fill/Solution.java

@@ -0,0 +1,23 @@
+class Solution {
+    public int[][] floodFill(int[][] image, int sr, int sc, int newColor) {
+        int oldColor = image[sr][sc];
+        dfs(image, sr, sc, oldColor, newColor);
+        return image;
+    }
+
+    private void dfs(int[][] image, int sr, int sc, int oldColor, int newColor) {
+        if (sr < 0 || sc < 0 || sr >= image.length || sc >= image[0].length) {
+            return;
+        }
+
+        int color = image[sr][sc];
+        if (color != newColor && color == oldColor) {
+            image[sr][sc] = newColor;
+            // up down left right
+            dfs(image, sr, sc + 1, oldColor, newColor);
+            dfs(image, sr, sc - 1, oldColor, newColor);
+            dfs(image, sr + 1, sc, oldColor, newColor);
+            dfs(image, sr - 1, sc, oldColor, newColor);
+        }
+    }
+}