Exercise : AgeCheck

Copy/paste and save the following program in jGRASP, then see the instructions on the next slide.

public class AgeCheck {
    public static void main(String[] args) {
        int myAge = 19;   // I am 19; let me see if I can drive
        message(myAge);
    }

    // Displays message about driving to user based on given age
    public static void message(int age) {
        if (myAge >= 16) {
            System.out.println("I'm old enough to drive!");
        }
        if (myAge <= 16) {
            System.out.println("Not old enough yet... :*(");
        }
    }
}

Exercise - things to fix

The program has a few syntax errors. Fix them until it compiles.
The code has a logic problem. (For some value(s), it prints the wrong answer.) Find any such problems and fix them. (You may need to run the program a few times and try different values to see which ones fail.)
The program uses if and else in a clumsy way. Improve the style of the code.

Exercise - answer

The following is a corrected version of the program:

public class AgeCheck {
    public static void main(String[] args) {
        int myAge = 19;   // I am 19; let me see if I can drive
        message(myAge);
    }

    // Displays a message about driving to user based on given age
    public static void message(int age) {
        if (age >= 16) {
            System.out.println("I'm old enough to drive!");
        } else {
            System.out.println("Not old enough yet... :*(");
        }
    }
}