如何在Java中没有时间获取日期？ - How do I get a Date without time in Java?

问题：

Continuing from Stack Overflow question Java program to get the current date without timestamp : 继续Stack Overflow问题Java程序以获取没有时间戳的当前日期 ：

What is the most efficient way to get a Date object without the time? 没有时间获取Date对象的最有效方法是什么？ Is there any other way than these two? 除了这两个还有其他方法吗？

// Method 1
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date dateWithoutTime = sdf.parse(sdf.format(new Date()));

// Method 2
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
dateWithoutTime = cal.getTime();

Update : 更新 ：

1. I knew about Joda-Time ; 我知道Joda-Time ; I am just trying to avoid additional library for such a simple (I think) task. 我只是想为这么简单（我认为）的任务避免使用额外的库。 But based on the answers so far Joda-Time seems extremely popular, so I might consider it. 但基于迄今为止的答案，Joda-Time似乎非常受欢迎，所以我可能会考虑它。

2. By efficient , I mean I want to avoid temporary object String creation as used by method 1 , meanwhile method 2 seems like a hack instead of a solution. 通过有效 ，我的意思是我想避免method 1使用的临时对象String创建，同时method 2似乎是一个黑客而不是解决方案。

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解决方案：

参考一： https://stackoom.com/question/LBmM
参考二： How do I get a Date without time in Java?