如何在 Java 中迭代整数数组列表的元素
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How to iterate elements of an integer arraylist in Java
提问by Abushawish
I understand that when you iterate a regular array element it is like so:
我知道当您迭代常规数组元素时，它是这样的：
int[] counter = new int[10];
for loop{
counter[i] = 0;
}
when button clicked{
counter[0]++; //For example
counter[6]++;
}
However I'm not understanding how to iterate through elements of an arraylist. If someone could help me understand I'll be appreciative. Thanks!
但是我不明白如何遍历数组列表的元素。如果有人能帮助我理解，我将不胜感激。谢谢！
回答by Benjamin Gruenbaum
The easiest way would be to use a for each loop
最简单的方法是为每个循环使用一个
for(int elem : yourArrayList){
elem;//do whatever with the element
}
回答by Achintya Jha
for (int i = 0; i < arrayList.size(); i++) {
}
Or
或者
Iterator<Object> it = arrayList.iterator();
while(it.hasNext())
{
Object obj = it.next();
//Do something with obj
}
回答by kaysush
Iterating over an array list is really simple.
遍历数组列表非常简单。
You can use either the good old for loopor can use the enhanced for loop
您可以使用旧的for loop，也可以使用enhanced for loop
Good Old for loop
好老的 for 循环
int len=arrayList.size();
for(int i = o ; i < len ; i++){
int a =arrayList.get(i);
}
Enhanced for loop
增强的 for 循环
for(int a : arrayList){
//you can use the variable a as you wish.
}
