java – 用于数组倒计时的反向循环

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
    at Reverse.main(Reverse.java:20).

语法没有错,所以我不确定为什么编译时会出错？

public class Reverse {

public static void main(String [] args){
    int i,j;


    System.out.print("Countdownn");

    int[] numIndex = new int[10]; // array with 10 elements.

    for (i = 0; i<11 ; i++) {
        numIndex[i] = i;// element i = number of iterations (index 0=0,1=1,ect.)
    }

    for (j=10; j>=0; j--){ // could have used i,doesn't matter.
        System.out.println(numIndex[j]);//indexes should print in reverse order from here but it throws an exception?
    }
}

}