From afaca167dc4166584e6d7ba3db7ad1c25524cf1f Mon Sep 17 00:00:00 2001
From: wzs <1014355013@qq.com>
Date: Wed, 12 May 2021 23:22:42 +0800
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---
 .../0122.买卖股票的最佳时机II.md     | 22 ++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/problems/0122.买卖股票的最佳时机II.md b/problems/0122.买卖股票的最佳时机II.md
index 1a9b4f7f..2e973217 100644
--- a/problems/0122.买卖股票的最佳时机II.md
+++ b/problems/0122.买卖股票的最佳时机II.md
@@ -133,9 +133,29 @@ public:
 
 ## 其他语言版本
 
-
 Java：
 
+```java
+class Solution { // 动态规划
+    public int maxProfit(int[] prices) {
+        // [天数][是否持有股票]
+        int[][] dp = new int[prices.length][2];
+
+        // bad case
+        dp[0][0] = 0;
+        dp[0][1] = -prices[0];
+
+        for (int i = 1; i < prices.length; i++) {
+            // dp公式
+            dp[i][0] = Math.max(dp[i - 1][0], dp[i - 1][1] + prices[i]);
+            dp[i][1] = Math.max(dp[i - 1][1], dp[i - 1][0] - prices[i]);
+        }
+
+        return dp[prices.length - 1][0];
+    }
+}
+```
+
 
 Python：