From 2e2f7735d6b99bb73f0b96f11c205fe70fa774a2 Mon Sep 17 00:00:00 2001
From: nanhuaibeian <49868746+nanhuaibeian@users.noreply.github.com>
Date: Thu, 13 May 2021 09:37:33 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=89=91=E6=8C=87Offer05.?=
 =?UTF-8?q?=E6=9B=BF=E6=8D=A2=E7=A9=BA=E6=A0=BC.md=20Java=E7=89=88?=
 =?UTF-8?q?=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/剑指Offer05.替换空格.md | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/problems/剑指Offer05.替换空格.md b/problems/剑指Offer05.替换空格.md
index 7881adf3..5f89241b 100644
--- a/problems/剑指Offer05.替换空格.md
+++ b/problems/剑指Offer05.替换空格.md
@@ -129,7 +129,26 @@ for (int i = 0; i < a.size(); i++) {
 
 
 Java：
-
+```Java
+//使用一个新的对象，复制 str，复制的过程对其判断，是空格则替换，否则直接复制，类似于数组复制
+public static String replaceSpace(StringBuffer str) {
+        if (str == null) {
+            return null;
+        }
+		//选用 StringBuilder 单线程使用，比较快，选不选都行
+        StringBuilder sb = new StringBuilder();
+		//使用 sb 逐个复制 str ，碰到空格则替换，否则直接复制
+        for (int i = 0; i < str.length(); i++) {
+		//str.charAt(i) 为 char 类型，为了比较需要将其转为和 " " 相同的字符串类型
+            if (" ".equals(String.valueOf(str.charAt(i)))){
+                sb.append("%20");
+            } else {
+                sb.append(str.charAt(i));
+            }
+        }
+        return sb.toString();
+    }
+```
 
 Python：