如何在while循环中填充数组列表 [英] How to populate an array list in a while loop

问题描述

我的问题是这个

Scanner sf = new Scanner(f);
ArrayList<String> teamArr = new ArrayList<String>();
int counterPopulate = 0;

while(sf.hasNextLine()){
    teamArr[counterPopulate] = sf.nextLine();
    counterPopulate++;           
}

任何解决方案，这都被 try catch 包围.在这部分得到问题 teamArr[counterPopulate] = sf.nextLine();

Any solutions, this is surrounded by a try catch. Getting the problem at this part teamArr[counterPopulate] = sf.nextLine();

推荐答案

因为ArrayList与普通的arrays不同，需要使用ArrayList的方法 类来填充 ArrayList.

Because ArrayList is different than normal arrays, you need to use methods of the ArrayList class to populate the ArrayList.

在你的情况下，你需要做:

In your case you need to do:

while(sf.hasNextLine()){
            teamArr.add(sf.nextLine());
        }

假设您使用的是 Java.

Assuming you're using Java.

看看 http://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html

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