Java jdk1.5中MessageFormat.format和String.format的区别？
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difference between MessageFormat.format and String.format in jdk1.5?
提问by kedar kamthe
What is the difference between MessageFormat.formatand String.formatin JDK 1.5?
JDK 1.5MessageFormat.format和String.formatJDK 1.5 中有什么区别？
回答by lbalazscs
String.format is just a shortcut to Formatter, this is a "printf-style" formatter. On the other side, MessageFormatuses a different formatting convention, as described in the linked documentation.
String.format 只是Formatter的快捷方式，这是一个“printf 风格”的格式化程序。另一方面，MessageFormat使用不同的格式约定，如链接文档中所述。
Use the first "for layout justification and alignment, common formats for numeric, string, and date/time data, and locale-specific output"and the second "to produce concatenated messages in language-neutral way".
使用第一个“用于布局调整和对齐，数字、字符串和日期/时间数据的通用格式以及特定于区域设置的输出”，第二个“以语言中立的方式生成连接消息”。
回答by Adam Dyga
Put simply, the main difference is in format string:
简而言之，主要区别在于格式字符串：
MessageFormat.format()format string accepts argument positions (eg.{0},{1}). Example:"This is year {0}!"The developer doesn't have to worry about argument types, because they are, most often, recognized and formated according to current
Locale.String.format()format string accepts argument type specifiers (eg.%dfor numbers,%sfor strings). Example:"This is year %d!"String.format()generally gives you much more control over how the argument is displayed thanks to many options you can specify with the type specifier. For instance, format string"%-6.2f"specifies to display a left-aligned floating point number with min. width 6 chars and precision of 2 decimal places.
MessageFormat.format()格式字符串接受参数位置（例如{0}，{1}）。例子："This is year {0}!"开发人员不必担心参数类型，因为它们通常是根据当前的
Locale.String.format()格式字符串接受参数类型说明符（例如，%d对于数字，%s对于字符串）。例子："This is year %d!"String.format()由于您可以使用类型说明符指定许多选项，因此通常可以让您更好地控制参数的显示方式。例如，格式字符串"%-6.2f"指定显示一个左对齐的带有 min 的浮点数。宽度为 6 个字符，精度为 2 位小数。
Just have a look at javadoc of both methods to find out more details.
只需查看这两种方法的 javadoc 即可了解更多详细信息。
