How to display text once in a loop in Java ?

Question

In Java, how to display text once in a loop ? Example, in a countdown I want to display once the text "you have 10 seconds left." when the count arrives at 10.

Is there any other solution apart from this one ?
If (i==10) {
System.out.println() ;
}

Another example
Suppose that a program calculates the fall of an object and displays its speed from second to second. As soon as the object speed exceeds a given speed (10 m / s), the program displays (in addition, but only once) a message. The speed displayed is not always equal to 10m/s. Thanks for your help.

Answer 1

~ swim ~ it's like codemonkey says. Thank you all.

Answer 2

Thanks you. It's work.

Answer 3

it was not the answer I wanted. I misspoke my question. Please review my other example. Thank you.

Answer 4

System.out.println("You have " + i + "seconds left");