Java 列表索引值检索
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List index value retrieval
提问by sarah
I have list having data like a, b, c, d, e, f, g, h, i if i want this list i would say getList(); which returns me a arraylist,i need only the value at index 10 that is 'i' ,how would i do this ?
我有包含 a、b、c、d、e、f、g、h 等数据的列表，如果我想要这个列表，我会说 getList()；它返回一个数组列表，我只需要索引 10 处的值，即 'i'，我该怎么做？
采纳答案by Bozho
getList().get(8);
Have in mind that index is 0-based. So index 8means the 9thitem.
请记住，索引是基于 0 的。所以索引8意味着9th项目。
Advice: always look at the javadoc, or open the autocomplete of your IDE, to see what methods does your object have. Most of them are named and documented in a way that it is explicitly known what they actually do.
建议：始终查看javadoc，或打开 IDE 的自动完成功能，看看您的对象有哪些方法。它们中的大多数都以明确知道它们实际做什么的方式命名和记录。
For example, in your case, google for "ArrayList", open the first result (from java.sun.com), and look through the methods there.
例如，在您的情况下，谷歌搜索“ArrayList”，打开第一个结果（来自 java.sun.com），并查看那里的方法。
