system1__currentTimeMillis

Author: CPU-Code

README.md

@@ -2,7 +2,7 @@
  * @由于个人水平有限, 难免有些错误, 还请指点:  
  * @Author: cpu_code
  * @Date: 2020-07-12 12:03:11
- * @LastEditTime: 2020-09-16 09:16:32
+ * @LastEditTime: 2020-09-16 09:32:32
  * @FilePath: \java\README.md
  * @Gitee: [https://gitee.com/cpu_code](https://gitee.com/cpu_code)
  * @Github: [https://github.com/CPU-Code](https://github.com/CPU-Code)
@@ -226,6 +226,18 @@ java编程基础 面向对象 javaAPI 集合 IO GUI JD8C 多线程 网络编程
 - [x] [date9__Calendar_add](javaAPI/date/date9.java)
 - [x] [date10__Calendar_getTime](javaAPI/date/date10.java)
 
+### [System类](javaAPI/system)
+
+- [x] [system1__currentTimeMillis](javaAPI/system/system1.java)
+
+
+
+### [StringBuilder类](javaAPI/stringBuilder)
+
+
+### [包装类](javaAPI/stringBuilder)
+
+
 -----------------------
 
 ## [异常处理](Exception)

javaAPI/system/system1.java

@@ -0,0 +1,23 @@
+/*
+ * @由于个人水平有限, 难免有些错误, 还请指点:  
+ * @Author: cpu_code
+ * @Date: 2020-09-16 09:33:07
+ * @LastEditTime: 2020-09-16 09:33:59
+ * @FilePath: \java\javaAPI\system\system1.java
+ * @Gitee: [https://gitee.com/cpu_code](https://gitee.com/cpu_code)
+ * @Github: [https://github.com/CPU-Code](https://github.com/CPU-Code)
+ * @CSDN: [https://blog.csdn.net/qq_44226094](https://blog.csdn.net/qq_44226094)
+ * @Gitbook: [https://923992029.gitbook.io/cpucode/](https://923992029.gitbook.io/cpucode/)
+ */
+package javaAPI.system;
+
+public class system1 {
+    public static void main(String[] args) {
+        //获取当前时间毫秒值
+        System.out.println(System.currentTimeMillis());
+    }
+}
+
+/*
+1600220019161
+*/