在下面的 if 语句中,如果为 false,则会正确打印 else 语句。 “不存在具有此编号的订单,请创建一个新订单。”
如果为真,它也会正确打印第一个语句,但后面总是跟着 else
语句。为什么 break;
在打印第一个 if case 后没有终止?
case(3):{
System.out.println("");
System.out.println("Please Enter The Order Number: ");
int orderno = input.nextInt();
Iterator<Order> orderIterator3 = orders.getIterator();
Order currentorder;
String itemRemoved = null;
StackInterface <String> newItems = new ArrayStack<String>();
while ( orderIterator3.hasNext()) { //iterate through the list until an order with a matching order no is found
currentorder = orderIterator3.next();
if(currentorder.getNumber() == orderno) { //access the Items in the list by their order number
newItems = currentorder.getItems(); //Copy the existing items into a new stack
if (!newItems.isEmpty())
itemRemoved = newItems.pop();
System.out.println("The last item: " + itemRemoved + "\n was successfully removed from your order!"); break;
}//End if
}//End While
System.out.println("No order with this number exists, please create a new order."); break;
}// End Case 3
最佳答案
当您在 while-loop
内部中断时,您将中断 while-loop
,而不是 case
。
有几种不同的方法可以实现此目的,但最简单的可能是添加一个 boolean 值,如果它应该打破这种情况,则将其设置为 true,例如:
boolean shouldBreak = false;
while( ... ) {
if( ... ) {
shouldBreak = true;
break; // break out of the while.
}
}
if(shouldBreak) {
break; // break out of the switch/case.
}
关于java - 为什么在打印第一个 if case 后 switch case 没有中断?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29715786/