Java 使用 for-each 循环打印 ArrayList
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时间:2020-08-16 08:00:35 来源:igfitidea点击:
Print an ArrayList with a for-each loop
提问by Jordan Westlund
Given the following exists in a class, how do I write a for-each that prints each item in the list?
鉴于类中存在以下内容,我如何编写一个 for-each 来打印列表中的每个项目?
private ArrayList<String> list;
list = new ArrayList<String>();
I have:
我有:
for (String object: list) {
System.out.println(object);
}
回答by Andreas Dolk
Your code works. If you don't have any output, you may have "forgotten" to add some values to the list:
您的代码有效。如果您没有任何输出,您可能“忘记”将一些值添加到列表中:
// add values
list.add("one");
list.add("two");
// your code
for (String object: list) {
System.out.println(object);
}
回答by Pranjal Gupta
import java.util.ArrayList;
import java.util.List;
class ArrLst{
public static void main(String args[]){
List l=new ArrayList();
l.add(10);
l.add(11);
l.add(12);
l.add(13);
l.add(14);
l.forEach((a)->System.out.println(a));
}
}