How are comments in Java typically denoted for a single line?

In Java, single-line comments are designated using the two forward slashes, which is represented by the syntax "//". When this syntax is used, everything that follows the slashes on that line is treated as a comment and ignored by the compiler. This allows programmers to write brief comments about their code, making it easier to understand and maintain without affecting the execution of the program.

For instance, if a developer writes:

int x = 5; // This is a variable

The text after the // is a comment that provides information about the variable x. It's important for documentation and clarity, especially in complex codebases.

Other options, such as the use of a single hash symbol or the /* symbol, are not used for single-line comments in Java. The /* ... */ syntax is specifically for multi-line comments, providing a way to comment out several lines at once. Additionally, the --> symbol is not a valid comment syntax in Java at all. Thus, understanding the correct syntax for comments is pivotal for clean and maintainable code.