是否有使用缓存格式的String.format替代品？

Are there any alternatives to Java's String.format which can cache the format String insead of requiring a format parse on each run? it would probably look something like this

Java的String.format是否有任何替代方法可以缓存每次运行时需要格式解析的格式String insead？它可能看起来像这样

Formatter formatter = new Formatter( "oh %s" );

formatter.format("my"); // oh my

3 个解决方案

#1

You could use the MessageFormat class.

您可以使用MessageFormat类。

MessageFormat mf = new MessageFormat("oh {0}");
System.out.println(mf.format(new Object[] {"my"}));
System.out.println(mf.format(new Object[] {"this will do it!"}));

Output:

输出：

oh my
oh this will do it!

#2

You could look into MessageFormat you can create one instance for a pattern and use it like this:

您可以查看MessageFormat，您可以为模式创建一个实例，并像这样使用它：

MessageFormat messageFormat = new MessageFormat(pattern); // initialize once
messageFormat.format(arguments, new StringBuffer(), null).toString(); // use often

#3

-8

String.format() can do the trick in a single line of code, try:

String.format（）可以在一行代码中完成这个技巧，尝试：

String s = String.format("oh %s", "my"); // oh my

#1