merge

2018-02-01 09:58:39 +08:00
parent c100deaa9c
commit 74678c62c7
1 changed files with 7 additions and 0 deletions
@@ -1,5 +1,8 @@
 package com.xwbing.demo;

+import java.util.HashMap;
+import java.util.Map;
+
 /**
 * 项目名称: boot-module-demo
 * 创建时间: 2018/1/23 14:45
@@ -8,6 +11,10 @@ package com.xwbing.demo;
 */
 public class demo {
    public static void main(String[] args) {
+        Map<String, String> map = new HashMap<>();
+        String s = map.get(null);
+        System.out.println("");
+

    }
 }