In Java, you can iterate over an enum using a for loop. Here's an example:

public class EnumIteration {
    enum Fruit {
        APPLE,
        BANANA,
        CHERRY,
        DATE
    }

    public static void main(String[] args) {
        for (Fruit f : Fruit.values()) {
            System.out.println(f);
        }
    }
}

In the above example, we define an enum type Fruit with four constants. We use the values() method of the Fruitenum to get an array of all the enum constants.

We use a for-each loop to iterate over the enum constants. Inside the loop, we use the : operator to iterate over each enum constant of the Fruitenum. We store the enum constant in a Fruit variable f. Finally, we print the enum constant to the console using the System.out.println() method.

After running the above code, the output would be:

APPLE
BANANA
CHERRY
DATE

This program iterates over the enum and prints each enum constant to the console using a for loop.