Java - 带连字符的String.format

Question

Writing my first real bit of Java code and I'm struggling to figure out this one out. 编写我的第一个真正的Java代码，我正在努力弄清楚这个。

I need to generate a string in set format: 我需要以set格式生成一个字符串：

code:100-100-100

I'm using String.format to try and generate it: 我正在使用String.format来尝试生成它：

String templateFormat = "code:%1$-%2$s-100";
String code = String.format(templateFormat, "100", "100", "100");

But the hyphen has special meaning to the formatter, how can I escape it? 但连字符对格式化程序有特殊意义，我怎么能逃脱呢？

Tried to escape the hyphen with a "\\" but Eclipse rightly informed me: 试图用“\\”来逃避连字符，但Eclipse正确告诉我：

Invalid escape sequence (valid ones are \\b \\t \\n \\f \\r \\" \\' \\ ) 无效的转义序列（有效转义序列为\\ b \\ t \\ n \\ f \\ r \\“\\ \\ \\ \\）

Cheers 干杯

Answer 1

The problem isn't with your hyphen so much as with your templateFormat: 问题不在于你的连字符，而在于你的templateFormat：

You have... String templateFormat = "code:%1$-%2$s-100"; 你有...... String templateFormat = "code:%1$-%2$s-100";

Where you need... String templateFormat = "code:%1$s-%2$s-100"; 你需要的地方...... String templateFormat = "code:%1$s-%2$s-100";

Notice the missing s in the %1$ part 注意%1$部分中缺少的s