线程“主”中的异常java.lang.ArrayIndexOutOfBoundsException：4错误

我正在一个项目中，我想向一个数组分配5个随机数，然后按升序对这些数字进行排序，但是出现以下错误...。我将不胜感激。

import java.util.Scanner;

public class YahtzeeGame {
public static Scanner sc = new Scanner(System.in);
    // random = random  between 1.0 and (6 * .999) + 1 is forced to be   integer      1-6
public static int random = (int) (Math.random() * 6 + 1);
public static int[] dice = new int[4];
public static void main (String[] args) {
    System.out.println("welcome to Yahtzee!");
    roll(dice);


}public static void roll (int[] dice) {
    for (int i = 0; i < dice.length; i++) {
        dice[i] = random;
        sort(dice);
    }
} public static void sort(int[] dice) {
    int temp;
    for (int j = 0; j < dice.length - 1; j++) {
        for (int i = 1; i < dice.length - j; i++) {
            if( dice[i] > dice[i+1]) {
                temp = dice[i-1];
                dice[i-1] = dice[i];
                dice[i] = temp;
            }
        }
    }  
}
}