如何制作一个包含 ascii 文本和 ascii 十六进制代码的混合常量字符串？

Question

I want to define a constant string as following:
"Hello World$1F"

Where the '$1F' is the ASCII hex code.
Your help is highly appreciated.

Answer 1

你要找的是：

"Hello World\u001F"

Answer 2

Java String, char, Character use the UTF-16 encoding of the Unicode character set. (Just in like JavaScript, .NET, VB4, NCHAR, NVARCHAR, ….) Any similarity to ASCII is rarely relevant.

So, by $1F you must mean the Unicode codepoint U+001F , which is represented in a String literal as the single UTF-16 code unit "\". (Note: You can visualize it using a control picture character ␟, too.)