Final answer:
To convert the integer 65 to the character 'A' in Java, use the casting keyword 'char' to cast the number as a character type.
Step-by-step explanation:
If you want to manually convert the number 65 to the letter 'A' in Java, you need to use a type casting keyword to convert the integer to a character type. Specifically, you would use the keyword char to cast the integer 65 to its equivalent character value.
The correct line of code would be:
char letter = (char) 65;
When you execute System.out.println(letter);, it will print out the letter 'A', which is the ASCII character corresponding to the integer value 65.