Removing a number from array in Java-CodePudding

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

CodePudding user response：

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 and in addition you also need to change the condition of the for loop to arr.length 1 or i <= arr.length, so it will count up to 7.

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

What you also can do instead of changing the loop itself, is to change the loop body. Just add 1 to i when assigning it to arr[i]:

for (int i = 0; i < arr.length; i  ) {
    arr[i] = i   1;
}

In this case i will count from 0 to 6, and assign 1 to 7 to your array

CodePudding user response：

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

   Integer[] arr = new Integer[7];
        for(int i = 1; i <8; i  ){
            int value = i-1;
            arr[value] = i;
        }

        Collections.shuffle(Arrays.asList(arr));
        for(int i = 0; i < arr.length; i  ){
                System.out.println("Result:" arr[i]);
        }

Console message:

Result:7
Result:2
Result:6
Result:5
Result:4
Result:1
Result:3