Authors:
Stuart Reges, Marty Stepp
Chapter:
Program Logic And Indefinite Loops
Exercise:
Exercises
Question:4 | ISBN:9780136091813 | Edition: 2
Question
Write a method called randomX that prints a lines that contain a random number of “x” characters (between 5 and 20 inclusive) until it prints a line that contains 16 or more characters. For example, the output might look like the following:
xxxxxxx
xxxxxxxxxxxxxxx
xxxxxxxxxxxx
xxxxxxxxxxxxxx
xxxxxx
xxxxxxxxxxx
xxxxxxxxxxxxxxxxx
Answer
import java.util.Random;
public class RandomCharacter {
// pass two interger values as a range
public void randomX(int origin, int bound) {
// use Random class to generate numbers between a range
Random random = new Random();
int range = bound - origin + 1;
int randomNum;
// it continously generate the random numbers till one time it generate 16 or
// more
while (true) {
// nextInt gives the random number in the bounded range. we add origin value to
// get
// a random number between those two.
randomNum = random.nextInt(range) + origin;
// run through loop
for (int i = 1; i <= randomNum; i++) {
System.out.print("*");
}
System.out.println();
// if it met our conditions, return
if (randomNum >= 17)
return;
}
}
public static void main(String[] args) {
new RandomCharacter().randomX(5, 20);
}
}
Output:
*********
*************
************
*********
****************
********
*******
**************
*******************