how to format a string with same value for all placeholders

Question

I have a template string

str = "Hello %s, your name is %s, %s 's born in 1990."

I want to format this string, as below: Hello Mr.P, your name is Mr.P, Mr.P 's born in 1990. I can do the following below:

String.format(str, "Mr.P","Mr.P","Mr.P");

产生以上。还有什么其他方式可以格式化字符串，而不必重复与n参数相同的值次数

Answer 1

您可以简单地引用一个特定的参数：

String.format("Hello %1$s, your name is %1$s", "Mr.P")

% =格式字符串的开头

1$ =第一个论点

s =类型字符串