From a56e5d68d9977042c0bba023f3cde014e348d3e4 Mon Sep 17 00:00:00 2001
From: shuzheng <469741414@qq.com>
Date: Mon, 27 May 2019 11:43:09 +0800
Subject: [PATCH 1/2] =?UTF-8?q?=E5=AD=97=E7=AC=A6=E4=B8=B2split=E4=BD=BF?=
 =?UTF-8?q?=E7=94=A8=E5=9C=BA=E6=99=AF=E6=AF=94=E8=BE=83=E9=A2=91=E7=B9=81?=
 =?UTF-8?q?=EF=BC=8C=E6=AD=A4=E5=A4=84=E6=9C=89=E4=B8=80=E4=B8=AA=E6=9E=81?=
 =?UTF-8?q?=E6=98=93=E6=8E=89=E5=9D=91=E7=9A=84=E6=93=8D=E4=BD=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 java/Split | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 java/Split

diff --git a/java/Split b/java/Split
new file mode 100644
index 0000000..b2c0519
--- /dev/null
+++ b/java/Split
@@ -0,0 +1,28 @@
+/**
+ * 字符串split使用场景比较频繁，此处有一个极易掉坑的操作
+ *
+ * @author shuzheng
+ * @date 2019/5/27
+ */
+public class Split {
+
+    public static void main(String[] args) {
+        String param1 = "1,2";
+        String param2 = "1,2,";
+        String param3 = ",1,2,";
+
+        System.out.println(param1.split(",").length);
+        System.out.println(param2.split(",").length);
+        System.out.println(param3.split(",").length);
+    }
+
+    /*
+     * 输出结果：
+     * 2
+     * 2
+     * 3
+     *
+     * 惊喜不惊喜？结尾的空字符串被丢弃，可使用重载方法 public String [] split (String  regex, int limit) 中 limit 参数控制模式应用的次数，-1 则不会丢弃结尾空字符。
+     */
+
+}
-- 
Gitee


From d69a1953accc7bcb911c956b7716ed0c55e6bea7 Mon Sep 17 00:00:00 2001
From: shuzheng <469741414@qq.com>
Date: Mon, 27 May 2019 12:05:31 +0800
Subject: [PATCH 2/2] =?UTF-8?q?Arrays.asList()=20=E6=95=99=E4=BD=A0?=
 =?UTF-8?q?=E9=87=8D=E6=96=B0=E5=81=9A=E4=BA=BA?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 java/FuckArrays | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 java/FuckArrays

diff --git a/java/FuckArrays b/java/FuckArrays
new file mode 100644
index 0000000..77c2813
--- /dev/null
+++ b/java/FuckArrays
@@ -0,0 +1,24 @@
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Arrays.asList() 教你重新做人
+ *
+ * @author shuzheng
+ * @date 2019/5/27
+ */
+public class FuckArrays {
+
+    public static void main(String[] args) {
+        int[] datas = new int[]{1, 2, 3, 4, 5};
+        List list = Arrays.asList(datas);
+
+        // 输出：1
+        System.out.println(list.size());
+
+        list.add(6);
+
+        // 输出：上一步抛出 Exception in thread "main" java.lang.UnsupportedOperationException
+        System.out.println(list.size());
+    }
+}
-- 
Gitee