Question

How to shuffle an array randomly in Java

Answer 1

import java.util.Collections;
import java.util.Arrays;
import java.util.List;

public class MyClass {
    public static void main(String args[]) {
        String[] array = {"a", "b", "c", "d", "e", "f", "g"};
        
        List<String> list = Arrays.asList(array);
        
        Collections.shuffle(list);
        
        System.out.println(list);
    }
}
     
     
     
     
/*
run:
     
[d, f, e, c, g, a, b]

*/

 

70+ SQL courses for beginners and professionals

Answer 2

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

public class MyClass {
    public static void main(String args[]) {
        String[] array = {"a", "b", "c", "d", "e", "f", "g"};
        
        ArrayList<String> al = new ArrayList<String>(Arrays.asList(array));
 
        Collections.shuffle(al);
         
        array = al.toArray(array);
        
        System.out.println(Arrays.toString(array));
    }
}
     
     
     
     
/*
run:
     
[e, c, b, d, g, a, f]

*/

 

70+ SQL courses for beginners and professionals