增加编辑距离解法代码

动态规划系列/编辑距离.md

@@ -262,7 +262,38 @@ class Node {
 
 ![labuladong](../pictures/labuladong.png)
 
-Jinglun Zhou 提供C++解法代码：
+[labuladong](https://github.com/labuladong) 提供Java解法代码：
+
+```
+int minDistance(String s1, String s2) {
+    int m = s1.length(), n = s2.length();
+    int[][] dp = new int[m + 1][n + 1];
+    // base case 
+    for (int i = 1; i <= m; i++)
+        dp[i][0] = i;
+    for (int j = 1; j <= n; j++)
+        dp[0][j] = j;
+    // 自底向上求解
+    for (int i = 1; i <= m; i++)
+        for (int j = 1; j <= n; j++)
+            if (s1.charAt(i-1) == s2.charAt(j-1))
+                dp[i][j] = dp[i - 1][j - 1];
+            else               
+                dp[i][j] = min(
+                    dp[i - 1][j] + 1,
+                    dp[i][j - 1] + 1,
+                    dp[i-1][j-1] + 1
+                );
+    // 储存着整个 s1 和 s2 的最小编辑距离
+    return dp[m][n];
+}
+
+int min(int a, int b, int c) {
+    return Math.min(a, Math.min(b, c));
+}
+```
+
+[Jinglun Zhou](https://github.com/Jasper-Joe) 提供C++解法代码：
 
 ```CPP