- Comments can be used to explain Java code, and to make it more readable. It can also be used to prevent execution when testing alternative code
- Single-line comments start with two forward slashes (//).
- Any text between // and the end of the line is ignored by Java (will not be executed).
This example uses a single-line comment before a line of code:
Example
// This is a comment
System.out.println("Hello World");
This example uses a single-line comment at the end of a line of code:
Example
System.out.println("Hello World"); // This is a comment
Java Multi-line Comments
- Multi-line comments start with /* and ends with */.
- Any text between /* and */ will be ignored by Java.
- This example uses a multi-line comment (a comment block) to explain the code:
Example
/* The code below will print the words Hello World
to the screen, and it is amazing */
System.out.println("Hello World");
Single or multi-line comments
It is up to you which you want to use. Normally, we use // for short comments, and /* */ for longer.
