if(e.getSource() == register)
{
String registerIndex = coursesAvailable.getSelectedValue().toString();
for(int i = 0; i < cTitle.length; i++)
{
double runningTotal = 0;
if(cTitle[i].equals(registerIndex))
{
runningTotal += cPrice[i];
cSeatsAvail[i] = cSeatsAvail[i] - 1;
seatsAvailable.setText(String.valueOf(cSeatsAvail[i]));
courseSelected.replaceSelection(cTitle[i] + " === $" + cPrice[i] + "\n");
total.setText("Total: $" + runningTotal);
break;
}
else
{
continue;
}
}
}
“注册”按钮的代码。当您单击它时,无论您在JList中选择的大学课程,它都会在课程选择的文本区域中显示课程标题和价格,并在总文本字段中显示您的总计课程。问题是,我的runningTotal没有将值一起添加,它似乎只是将总文本字段中的值替换为新课程的价格。
答案 0 :(得分:6)
目前你在循环中重置 runningTotal - 所以它不起作用:
for(int i = 0; i < cTitle.length; i++)
{
double runningTotal = 0; // Resets every iteration!!!
尝试将其移出循环:
double runningTotal = 0; //Init once before the loop !
for(int i = 0; i < cTitle.length; i++)
{
答案 1 :(得分:2)
替换它,
for(int i = 0; i < cTitle.length; i++)
{
double runningTotal = 0;
通过
double runningTotal = 0;
for(int i = 0; i < cTitle.length; i++)
{