Sort me out! Sorting help

Question

I am working on a project for class that simulates a card game. I need to group the cards by suit and arrange the cards in decreasing order within that suit. I am going to put all of the hearts in one array, clubs in another, and so on. However, I can not figure out how to sort the array (lets say hearts for this example) so that the numbers appear in decreasing order. The code below is my most recent snippet and it gives me an out of bounds error. FYI, the array is an array of card objects. The getValue method pulls an integer value from 1 to 13 depending on the card. PLEASE SAVE ME!!!
//Arrange the hearts in decreasing order
for(int i=0; i < hearts.length; i++){
for(int j=0; j < hearts.length; j++){
if(hearts[j].getValue() > hearts[j+1].getValue()){
temp [0]=hearts[j];
hearts[j] = hearts[j+1];
hearts[j+1] = temp [0];
}

Answer 1

if(hearts[j].getValue() > hearts[j+1].getValue()){
temp [0]=hearts[j];
hearts[j] = hearts[j+1];
hearts[j+1] = temp [0];
} What happens when getValue() returns 13? Figure that out and you will find the reason for your ArrayOutOfBoundsException. [Hint: walk through your code with the j=13).