[java] In Java, should I escape a single quotation mark (') in String (double quoted)?

In Java, \' denotes a single quotation mark (single quote) character, and \" denotes a double quotation mark (double quote) character.

So, String s = "I\'m a human."; works well.

However, String s = "I'm a human." does not make any compile errors, either.

Likewise, char c = '\"'; works, but char c = '"'; also works.

In Java, which is better to use? In HTML or CSS, things like style="font-family:'Arial Unicode MS';" are more often (and for such tags, I think it's the only way to use quotation marks), but in Java, I usually saw people use escape characters like "I\'m a human."

It's best practice only to escape the quotes when you need to - if you can get away without escaping it, then do!

The only times you should need to escape are when trying to put " inside a string, or ' in a character:

String quotes = "He said \"Hello, World!\"";
char quote = '\'';