Java

/* package whatever; // don't place package name! */

/* Name of the class has to be "Main" only if the class is public. */
import java.util.ArrayList;
class Demo
{
	public static void main(String[] args) {
		ArrayList<String> list1 = new ArrayList<String>();
		ArrayList<String> list2 = new ArrayList<String>();
		int index = 0;
		list1.add("ahio");
		list1.add("bro");
		list1.add("higoodbye");
		list2.add("hi");
		list2.add("goodbye");
		for (String x : list1) {
			for (String y : list2) {
				if (x.contains(y)) {
					index = list1.indexOf(x);
					list1.set(index, x.replaceAll(y, y.replaceAll("[a-zA-Z]", "*")));
				}
			}
		}
		System.out.println(String.join(" ", list1));
	}
}

Warning\Error

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1
	at java.util.ArrayList.elementData(ArrayList.java:418)
	at java.util.ArrayList.set(ArrayList.java:446)
	at Demo.main(Main.java:20)

<pre>public PriorityNotes[] getPriorityNotes(){
	
PriorityNotes[] PriorityNotes = new PriorityNotes[notes.size()];
	
PriorityNotes = notes.toArray(PriorityNotes);

int i;

for(i = 0 ; i < notes.size(); i++){


}
	
return PriorityNotes;}