从 Java 中的数组中删除一个数字

Question

I would like to remove a particular number from the array

Integer[] arr = new Integer[7];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = i;
        }
        Collections.shuffle(Arrays.asList(arr));

This is creating numbers from 0-7 But I dont need 0,I need value from 1-7

Answer 1

Change your int i = 0 to int i = 1 like this:

Integer[] arr = new Integer[7];
        for (int i = 1; i < arr.length; i++) {
            arr[i] = i;
        }
        Collections.shuffle(Arrays.asList(arr));

Answer 2

The first value written into your array is 0 because you initialize i with 0 in the for loop.

Therefore your loop will only insert the values 0 - 6 .

Change this initialisation to i = 1 .

Integer[] arr = new Integer[7];
for (int i = 1; i < arr.length; i++) {
    arr[i] = i;
}