Java arraylist超出范围索引：1，大小：1

改变

到

---

列表

的有效索引必须小于其大小（或者更准确地说，从

0

到

size（）-1

）。

Java经常使用基于0的索引。如果大小为1，请尝试使用索引0。这里有很多代码。当你发布一个问题时，请尽量把它减少到刚好足够的代码来重现这个问题。现在，第一个结果Bs的读取器和文件的其余部分还没有存储在arraylist中

ArrayList<String> accon = new ArrayList<String>();
ArrayList<Double> balance = new ArrayList<Double>();
try{
    BufferedReader Buffer = new BufferedReader(new FileReader(new File(
    "D://transactions.txt")));
    String line = null;
    while ((line = Buffer.readLine()) != null) {
        // String arr[] = line.split(" ");

        String Id = line.substring(0, 17);
        String Case = line.substring(18, 19);
        double a = Double.parseDouble(line.substring(20));
        //System.out.print(""+Id+" "+Case+" "+a);
        //System.out.println("  "+accon);

        if (accon.isEmpty()) {
            accon.add(Id);
            //balance.add(0.0);
            System.out.println("found A" + balance);
            System.out.println("found Id " + Id);
            if (Case.toUpperCase().trim().equals("D")) {
                balance.add(a = a*-1);
                System.out.println("Found Case " + Case);
                System.out.println("Found balance" + balance);
            } else if (Case.toUpperCase().trim().equals("C")) {
                System.out.println("Found Case C = " + Case);
                balance.add(a);
                System.out.println("Found balance C =" + balance);
            }
        } else {
            System.out.println("Hi");
            int ii = 0;
            System.out.println("not empty");
            do {
                System.out.println("welcome" + "II=" + ii);
                if (accon.get(ii).equals(Id.trim())) {
                    System.out.println(accon + " = " + Id);
                    if (Case.toUpperCase().trim().equals("D")) {
                        System.out.println("Found Case D = " + Case);
                        System.out.println("balance.get(ii) = " + balance.get(ii));
                        balance.set(ii, balance.get(ii) - a);
                        System.out.println("II=" + ii);
                        System.out.println("balance.get(ii) = " + balance.get(ii));

                        System.out.println("the II =" + ii + " the balance D =" + balance);
                    } else if (Case.toUpperCase().trim().equals("C")) {
                        balance.set(ii, balance.get(ii) + a);
                        System.out.println("the II =" + ii + " the balance C =" + balance);
                    }
                }

                ii++;
            } while (accon.size() >= ii);
            System.out.println("----------------------------------------------");
        }

    }
    for (int i = 0; i < accon.size(); i++) {
        System.out.println(accon.get(i));
        System.out.println(balance.get(i));
        // System.out.println(accon.size());

    }

}

catch(Exception e) {
    System.out.print("" + e);
}

 found A[]
    found Id 00001500205568600
    Found Case D
    Found balance[-1520.15]
    Hi
    not empty
    welcomeII=0
    [00001500205568600] = 00001500205568600
    Found Case D = D
    balance.get(ii) = -1520.15
    II=0
    balance.get(ii) = -14020.15
    the II =0 the balance D =[-14020.15]
    welcomeII=1
    java.lang.IndexOutOfBoundsException: Index: 1, Size: 1

while (accon.size()>=ii)

while (accon.size()>ii)