Strange Jsoup OutOfBoundsException when fetching html

Question

When using 12 in iteration (inside for) it output correctly, when assigning 13 to iterator (inside for) throws IndexOutOfBoundsException on line

imageUrl[i]=images.select("img").get(i).absUrl("data-original");`.

Note: class lazy in hasClass("lazy") has 12 elements:

Elements headlines = document.select("div.newscat a[href] h3");
Elements images=document.select("div.newscat").select("a[href]");
int lengthHeadline = headlines.size(); // outputs 13
String[] newsHeadline=new String[lengthHeadline];
String[] imageUrl=new String[lengthHeadline]

for(int i=0; i<12; i++){

    if (images.get(i).children().hasClass("lazy")){
        imageUrl[i] = images.select("img").get(i).absUrl("data-original");
    }else{
        imageUrl[i] = "http://something.com/8046.png";
    }
    System.out.println(imageUrl[i]);

}

EDIT:

HTML code

Here I have let say n number of .newscat classes and each of them contains picture and headlines, but in some cases they hold no image but headline only, so instead of blank-display I want to display any other image. So my image array should math that of headline.

The View that I want to be displayed (something like that).

Answer 1

  

将13分配给迭代器（inside for）时抛出IndexOutOfBoundsException行

imageUrl[i] = images.select("img").get(i).absUrl("data-original");

不检查Element返回的images.select("img")列表大小。

而是试试这个：

if (images.get(i).children().hasClass("lazy")) {
    Elements imgs = images.select("img");
    if (imgs.size() < i) {
       imageUrl[i] = imgs.get(i).absUrl("data-original");
    } else {
       // Handle the edge case here...
    }
} else {
    imageUrl[i] = "http://something.com/8046.png";
}