Question

为什么第一个工作而另一个不工作？

for (int v=0; v< student1.size();v++) {
    readLine = student1.get(v);

    if (readLine.contains(sbB)){

        while(!(readLine1.contains(sbA) || readLine1.contains(sbC) || readLine1.contains(sbD) )){

            readLine1 = student1.get(ii);
            if(readLine1.contains("Homework ")){
                String[] tokens = readLine1.split(": "); st1marksHwB.add(tokens[1]);summHw = summHw + Integer.parseInt(tokens[1]);}
            if (readLine1.contains("Exam ")){
                String[] tokens = readLine1.split(": "); st1marksExB.add(tokens[1]);summEx = summEx + Integer.parseInt(tokens[1]);;}
            ii++;}}}   
double avSt1B = summHw*0.2 + summEx*0.8; summHw=0;summEx=0;

//Stundent 1 Subject C---------------------------------------------------
for (int v=0; v< student1.size();v++) {
      readLine = student1.get(v);

    if (readLine.contains(sbC)){

        while(!(readLine1.contains(sbA) || readLine1.contains(sbB) || readLine1.contains(sbD) )){

            readLine1 = student1.get(ii);
                if(readLine1.contains("Homework ")){
                    String[] tokens = readLine1.split(": "); st1marksHwC.add(tokens[1]);summHw = summHw + Integer.parseInt(tokens[1]);}
                if (readLine1.contains("Exam ")){
                    String[] tokens = readLine1.split(": "); st1marksExC.add(tokens[1]);summEx = summEx + Integer.parseInt(tokens[1]);;}
                ii++;}}}
double avSt1C = summHw*0.2 + summEx*0.8; summHw=0;summEx=0;

Answer 1

这是因为您使用ii在第一个for循环中增加了ii++的值。然后将ii的最后一个增加值传递给第二个for循环。

循环不起作用并产生IndexOutOfBoundsException

1 个答案: