Java bogosort

import java.math.*;
import java.util.Arrays;

public class Test {
	
	public static void shuffle(int[] arr) {
		for(int i = 0; i < arr.length; i++) {
	        int index = (int) (Math.random() * arr.length);
	        int temp = arr[i];
	        arr[i] = arr[index];
	        arr[index] = temp;
		}
	}
	
	public static boolean isSorted(int[] arr) {
		for(int i = 1; i < arr.length; i++) {
			if(arr[i] < arr[i-1]) {
				return false;
			}
		}
		return true;
	}
	
	public static void bogoSort(int[] arr) {
		while(!isSorted(arr)) {
			shuffle(arr);
		}
	}
	
	public static void main(String[] args) {
		int[] arr = {3, 31, 16, 8};
		bogoSort(arr);
	    System.out.println(Arrays.toString(arr));
	}
}
Jacob Burns