“同义词”在Java中是什么意思？

Question

我阅读了来自http://docs.oracle.com/javase/8/docs/api/的JavaAPI文档。对于日历类，有以下段落：

DAY_OF_MONTH

public static final int DAY_OF_MONTH

Field number for get and set indicating the day of the month. This is a synonym for DATE. The first day of the month has value 1.

See Also:

DATE, Constant Field Values

我几乎听不懂描述，尤其是被“同义词”这个词弄糊涂了。如果有人能向我解释这段话，我将不胜感激

Answer 1

同义词的意思是有相同的意思

在Calendar的源代码中：

/**
 * Field number for <code>get</code> and <code>set</code> indicating the
 * day of the month. This is a synonym for <code>DAY_OF_MONTH</code>.
 * The first day of the month has value 1.
 *
 * @see #DAY_OF_MONTH
 */
public final static int DATE = 5;

/**
 * Field number for <code>get</code> and <code>set</code> indicating the
 * day of the month. This is a synonym for <code>DATE</code>.
 * The first day of the month has value 1.
 *
 * @see #DATE
 */
public final static int DAY_OF_MONTH = 5;

这里两个值都是5，所以都是相同的

Answer 2

A synonym is：

synonym noun. 1. a word having the same or nearly the same meaning as another in the language, as happy, joyful, elated. A dictionary of synonyms and antonyms (or opposites). 2. (...)

因此，它意味着某物有一个不同的（字段）名称来表示同一事物

因此，文档指定如果调用Calendar.DAY_OF_MONTH或Calendar.DATE。您将始终获得相同的值

我们可以在查看documentation for ^{}时验证这一点：

static int DATE

Field number for get and set indicating the day of the month.

static int DAY_OF_MONTH

Field number for get and set indicating the day of the month.

两个场的文档完全相同