In Java, the correct syntax of a for loop includes three parts inside the parentheses, separated by semicolons. The first part is the initialization (int i = 0), the second part is the condition check (i < 10), and the third part is the increment (i++). The loop will continue executing until the condition becomes false. Option A is incorrect because commas are used instead of semicolons. Option C uses colons instead of semicolons, which is not valid in Java. Option D is the syntax for Python, not Java.