增加淘宝群内容，修改部分文件组织

数据结构(双语)/数据结构 day16【瑞客论坛 www.ruike1.com】/代码/10-映射/src/com/mj/Times.java

@@ -0,0 +1,26 @@
+package com.mj;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class Times {
+	private static final SimpleDateFormat fmt = new SimpleDateFormat("HH:mm:ss.SSS");
+	
+	public interface Task {
+		void execute();
+	}
+	
+	public static void test(String title, Task task) {
+		if (task == null) return;
+		title = (title == null) ? "" : ("【" + title + "】");
+		System.out.println(title);
+		System.out.println("开始：" + fmt.format(new Date()));
+		long begin = System.currentTimeMillis();
+		task.execute();
+		long end = System.currentTimeMillis();
+		System.out.println("结束：" + fmt.format(new Date()));
+		double delta = (end - begin) / 1000.0;
+		System.out.println("耗时：" + delta + "秒");
+		System.out.println("-------------------------------------");
+	}
+}