Easy task indeed - like in C# - you must know for loop and know that instead of numbers you can use char data type - from 'a' to 'Z'; Here is my solution:
public class PrintCharacters04 {
public static void main(String[] args) {
for (char i = 'a'; i < 'z'; i++) {
System.out.print(i + " ");
}
System.out.println();
}
}