为什么会发生 ArrayIndexOutOfBoundsException 以及如何在 Android 中避免它? [英] Why does ArrayIndexOutOfBoundsException occur and how to avoid it in Android?

问题描述

为什么会出现ArrayIndexOutOfBoundsException以及在Android中如何避免?

Why does ArrayIndexOutOfBoundsException occur and how to avoid it in Android?

推荐答案

当您尝试访问不存在的数组项时抛出此异常:

This exception is thrown when you try to access an array item that doesn't exist:

String [] myArray = new String[2];

myArray[2] = "something"; // Throws exception
myArray[-1] = "something"; // Throws exception

在访问数组项之前，您应该检查索引是否为负且不大于数组长度.

You should check that your index is not negative and not higher than the array length before accessing an array item.

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