在下面的if语句中,如果它为假,则将正确打印else语句。 "No order with this number exists, please create a new order."
,如果为true,则也可以正确打印第一个语句,但始终跟随else
语句。为什么break;
不能在第一个if字符打印后终止?
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
在while-loop
内部中断时,将破坏while-loop
,而不是case
。
有几种不同的方法可以完成这项工作,但最简单的方法可能是添加一个布尔值,如果该值应打破常规,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.
}