JDK 1.5中的MessageFormat.format和String.format有什么区别? [英] What is the difference between MessageFormat.format and String.format in JDK 1.5?
问题描述
JDK 1.5中的 MessageFormat.format 和 String.format 有什么区别?
What is the difference between MessageFormat.format and String.format in JDK 1.5?
推荐答案
简单地说，主要区别在于格式字符串:
Put simply, the main difference is in format string:
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MessageFormat.format()格式字符串接受参数位置(例如{0}，{1}).示例:
MessageFormat.format()format string accepts argument positions (eg.{0},{1}). Example:
今年{0}！"
开发人员不必担心参数类型，因为它们通常根据当前的 Locale 进行识别和格式化.
The developer doesn't have to worry about argument types, because they are, most often, recognized and formated according to current Locale.
String.format()格式字符串接受参数类型说明符(例如，％d 用于数字，％s 用于字符串).示例:
String.format() format string accepts argument type specifiers (eg. %d for numbers, %s for strings). Example:
这是％d年！"
String.format()通常可让您更好地控制参数的显示方式.例如，格式字符串％-6.2f" 指定显示带有最小值的左对齐浮点数.宽度为6个字符，精度为2个小数位.
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.
只需看看这两种方法的javadoc即可了解更多详细信息.
Just have a look at javadoc of both methods to find out more details.
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