diff --git a/src/class09_15/Code02_NumberOfIslands.java b/src/class09_15/Code02_NumberOfIslands.java
index 5ffdc55..df8d8df 100644
--- a/src/class09_15/Code02_NumberOfIslands.java
+++ b/src/class09_15/Code02_NumberOfIslands.java
@@ -5,6 +5,9 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Stack;
 
+// 本题为leetcode原题
+// 测试链接：https://leetcode.com/problems/number-of-islands/
+// 所有方法都可以直接通过
 public class Code02_NumberOfIslands {
 
 	public static int numIslands3(char[][] board) {
diff --git a/src/class09_15/Code03_NumberOfIslandsII.java b/src/class09_15/Code03_NumberOfIslandsII.java
index ab61ed3..f0049c2 100644
--- a/src/class09_15/Code03_NumberOfIslandsII.java
+++ b/src/class09_15/Code03_NumberOfIslandsII.java
@@ -3,6 +3,9 @@ package class09_15;
 import java.util.ArrayList;
 import java.util.List;
 
+// 本题为leetcode原题
+// 测试链接：https://leetcode.com/problems/number-of-islands-ii/
+// 所有方法都可以直接通过
 public class Code03_NumberOfIslandsII {
 
 	public static List<Integer> numIslands2(int m, int n, int[][] positions) {