SingleQuoteString
DRAFT
Observed

SingleQuoteString
Incorrect

String literals can be in single quotes

Correct

String literals must be in double quotes

Correction
Here is what's right.

In Java, String literals must be in double quotes.

Origin
Where could this misconception come from?

In other programming langauges, strings can be delimited both by single quotes and double quotes (e.g, in Python or JavaScript).

Symptoms
How do you know your students might have this misconception?

Students may liberally use single quotes to delimit String literals, as they would in other programming languages.