简单复选框程序上的数组超出范围异常

问题描述

我有4个复选框，当被选择时，他们应该串联到单个串上的JLabel显示.它在排序之前一直在工作，不确定我是怎么做的，现在我得到了数组异常超出范围的错误.每当复选框与之交互时，这就是运行的update()方法.

I have 4 checkboxes, when selected they should concatenate onto a single string displayed on a Jlabel. It was working before sort-of, not sure whatI did to break it, now I get array exception out of bounds errors. This is the update() method being run whenever a checkbox is interacted with.

http://pastebin.com/tbSpx7jA

谢谢大家的回答，只是弄乱了我的初始数组声明.

It's been answered thanks all, just messed up my initial array declaration.

推荐答案

您似乎正在迭代到不存在的索引:

It looks like you're iterating to an index that does not exist:

for (int j = 0; j <= oslist2.length; j++)

应该是

for (int j = 0; j < oslist2.length; j++)

Java数组索引为(0，1，2 ... length-1)

Java array indexes are (0, 1, 2... length-1)

您也有

oslist2[3]="";

这意味着您应该使数组更大，或者不要使用该索引.这应该起作用:

which means, you should make the array bigger, or don't use that index.This should work:

String[] oslist2 = new String[4];

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