Write a program that initializes an array of 50 integers to random
numbers between 0 and 199. Write a method smooth that
takes the array and replaces each element with a weighted average of itself
(with weight 1/2) and its two neighbors (with weight 1/4 each).
The edge cases compute the average of itself and its only neighbor with weights
1/2.
Note that the method will need another array as a temporary storage.
Also write a method disturb that sets 3 randomly chosen elements in the array
to random numbers.
Write a loop that performs some number of smooth calls and one call to disturb. Use the method delay to pause between the calls. Watch "waves' created in the array.
import java.util.Random;
public class Waves {
private static Random rand = new Random();
public static void main(String [] args) {
int [] numbers = new int[50];
//initialize(numbers);
printIntArray(numbers);
//delay(1000);
}
/**
*
* The method prints its argument <code>arr</code>
* element by element on one line, separated by commas,
* with [ before the first element and ] after the last one
*
*/
public static void printIntArray(int [] arr) {
System.out.print("[");
for (int i = 0; i < arr.length; ++i) {
System.out.print(arr[i]);
if (i != arr.length - 1)
System.out.print(", ");
}
System.out.println("]");
}
/**
the method produces a time delay for the given
number of milliseconds
**/
public static void delay(int millisec) {
try {
Thread.sleep(millisec); // do nothing
}
catch(InterruptedException e) {
System.out.println("The program has been interrupted");
}
}
}