Basic Java Question, variable in a sentence?

Hey ya'll, I'm in a Java class at school and I completed the assignment. It went like this...

public class DaysOld

{

public static void main(String[] args)

{

int myAge = 18;

int days = myAge*365;

int hours = days*24;

int minutes = hours*60;

int seconds = minutes*60;

System.out.println("I am " + myAge);

System.out.println("Days old is " + days);

System.out.println("Hours old is " + hours);

System.out.println("Minutes old is " + minutes);

System.out.println("Seconds old is " + seconds);

}

}

My question is I want to change the sentence structure to say ("I am " + myAge "years old"); but i am getting an error when i try and insert the variable in the middle of the sentence, how can I accomplish this?

Thanks!