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[JAVA] Scattering ArrayList contents?
Hello!
Say I have:
ArrayList<String> example = new ArrayList<String>();
example.add("Hello");
example.add("World");
example.add("How");
example.add("Are");
example.add("You");
What is the best method to completely randomize this?
Is there a specific method I missed or maybe a package ready-for-use?
Thanks!
I came up with a pretty interesting method that IDK if it works.
public void shuffle(){
int deck_length = cards.size(); // how big the deck is
int cur_num = 0;
ArrayList used_numbers = new ArrayList ();
ArrayList new_arrl = new ArrayList ();
do {
Random ran = new Random();
cur_num = ran.nextInt(deck_length);
} while(used_numbers.contains(cur_num));
used_numbers.add(cur_num);
for (int i=0; i
1 Answer
- deonejuanLv 77 years agoFavorite Answer
use java.util.Collections.shuffle
import java.util.*;
public class CollectionsDemo {
public static void main(String args[]) {
// create array list object
List arrlist = new ArrayList();
// populate the list
arrlist.add("A");
arrlist.add("B");
arrlist.add("C");
System.out.println("Initial collection: "+arrlist);
// shuffle the list
Collections.shuffle(arrlist);
System.out.println("Final collection after shuffle: "+arrlist);
}
}
