Yeah I want to make a snake game, but for this I have to find a way to shift the data from an array. IE, an array contains those numbers:
{12, 95, 25, 68, 45}
Now I need to add a data at the very begining, and shift all the data right. Say I insert 89, this is how it should look:
{89, 12, 95, 25, 68}
Now I guess I could use Java's Queue class to add data and remove the last, but I cant find a way to make it work in Processing.

Anybody got an idea?

if you're just doing a series of integers, using modulo (%) is the best:

Code:

int[] nums = new int[10];
int numIndex = 0;

int addNum(int what) {
  nums[numIndex] = what;

  if (numIndex == 0) {
    numIndex = nums.length-1;
  } else {
    numIndex--;
  }
}

void retrieveNums() {
  for (int i = 0; i < nums.length; i++) {
    int index = (i + numIndex) % nums.length;
    // do something with 'index' here
  }
} 

or you can use arraycopy to shift things over:

Code:

int[] nums = new int[10];

void addNum(int what) {
  arraycopy(nums, 0, nums, 1, nums.length-1);
  nums[0] = what;
} 

...or you can use a for() loop to shift it by hand. but the % method is best/fastest.

if you're not using int[] arrays, you can do the same thing as above with objects.