java - 如何消除索引越界异常的错误

Question

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What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it? (25 个回答)

How do I compare strings in Java? (23 个回答)

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您好，我在 if(numList.get(x) == ""&& numList.get(x+1) == "") 行中不断收到 java.lang.IndexOutOfBoundsException。我该如何解决这个问题？

BufferedReader br = null;
        String row;
        String[] data = null;
        List<String> numList = new ArrayList<String>();

        BufferedReader csvReader = new BufferedReader(new FileReader("input file lab5.csv"));
        while ((row = csvReader.readLine()) != null) {
            data = row.split(",");
            // do something with the data

            for(int x=0; x<data.length; x++) {
                numList.add(data[x]);
            }
            numList.add(" ");
        }

        System.out.println("Make sure excel file is on src.\nNumbers extracted from file: "+numList);
        int n=0;

        for(int x=0; x<numList.size(); x++) {
            if(numList.get(x) == " " && numList.get(x+1) == " ") {
                n = x+1;
                break;

Answer 1

为最后一个索引处理添加一个检查 if 子句 (x < numList.size()-1)

if (numList.get(x) == " " && x < numList.size()-1 && numList.get(x+1) == " ") {