Web在咨询了大多数以前的答案之后，我仍然对我出错的地方感到困惑。我将JSON对象转换为字符串，然后将它们放到doListBackground方法中的arrayList中，然后在onPostExecte中调用intent，以便我可以将此arrayList传递到扩展ListActivity的另一个活动中，在那里我会出错并获取错误： 05-03 03:43:24.956 31502-31502/com.ex WebYou can also use a while or for loop to process list elements using the index. The ArrayList index starts at 0 just like arrays, but instead of using the square brackets [] to access elements, you use the get (index) to get the value at the index and set (index,value) to set the element at an index to a new value.

Java ArrayList (With Examples) - Programiz

WebYou can also loop through an ArrayList with the for-each loop: Example public class Main { public static void main(String[] args) { ArrayList cars = new … WebThe lambda expression multiplies each element of the arraylist by itself and prints the resultant value. To learn more about lambda expressions, visit Java Lambda … guts hoffman

ArrayLists and Iterators: Enhanced for Loop Saylor Academy

WebAnswer: Iterator visitor = primes.iterator () ; Enhanced for Loop The enhanced for loop (sometimes called a "for each" loop) can be used with any class that implements the Iterable interface, such as ArrayList. Here is the previous program, now written using an enhanced for loop. WebThe syntax of the forEach () method is: arraylist.forEach (Consumer action) Here, arraylist is an object of the ArrayList class. forEach () Parameters The forEach () method takes a single parameter. action - actions to be performed on each element of the arraylist forEach () Return Value The forEach () method does not return any value. WebJava 在ArrayList中查找项索引的更好方法？,java,for-loop,arraylist,Java,For Loop,Arraylist gutshof fratres