Java 需要重新编译一条语句，但我的代码将继续执行下一条语句，

在while语句中，键入错误的方向后，我得到一个错误，但随后继续下一个问题。如何将其格式化为有效的方向？不知道我是否应该使用do while或not对我来说这似乎是正确的方法，但似乎不起作用

import javax.swing.JOptionPane;
public class taxiService {

public static void main(String [] args) {

//Declare constants
double fareCharge = 5;
double totalMiles = 0;
double finalFareCharged = 0;
double finalxCoord = 0;
double finalyCoord = 0;
double numOfMiles = 0;
double finalCoord = 0;
String error = "Invalid data, please enter valid data!";

String directions = "";
boolean reprompt = true;
//Prompt for direction and miles

while (reprompt) {
   totalMiles = numOfMiles + numOfMiles;
   directions = JOptionPane.showInputDialog(null, "Please enter a direction: ");
   if (directions.equalsIgnoreCase("East")) {
      finalxCoord = finalxCoord + numOfMiles;
      reprompt = false;
      }
      else if (directions.equalsIgnoreCase("West")) {
               finalxCoord = finalxCoord - numOfMiles;
               reprompt = false;
               }
             else if (directions.equalsIgnoreCase("North")) {
                     finalyCoord = finalyCoord + numOfMiles;
                     reprompt = false;
                     }
                     else if (directions.equalsIgnoreCase("South")) {
                             finalyCoord = finalyCoord - numOfMiles;
                             reprompt = false;
                             }
             else {
                 reprompt = true;
                 JOptionPane.showMessageDialog(null, error);

        }
   numOfMiles = Double.parseDouble(JOptionPane.showInputDialog(null, "Please enter distance in miles: "));
   if (numOfMiles > 0) {
   JOptionPane.showMessageDialog(null, "miles: " + totalMiles);
   }
   else 
   JOptionPane.showMessageDialog(null, error);


   }
}
}

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将第二个问题移出循环。我认为这是你最初的想法，但由于把第二个问题放在循环中而犯了一个逻辑错误

import javax.swing.JOptionPane;
public class taxiService {

public static void main(String [] args) {

//Declare constants
double fareCharge = 5;
double totalMiles = 0;
double finalFareCharged = 0;
double finalxCoord = 0;
double finalyCoord = 0;
double numOfMiles = 0;
double finalCoord = 0;
String error = "Invalid data, please enter valid data!";

String directions = "";
boolean reprompt = true;
//Prompt for direction and miles

while (reprompt) {
   totalMiles = numOfMiles + numOfMiles;
   directions = JOptionPane.showInputDialog(null, "Please enter a direction: ");
   if (directions.equalsIgnoreCase("East")) {
      finalxCoord = finalxCoord + numOfMiles;
      reprompt = false;
      }
      else if (directions.equalsIgnoreCase("West")) {
               finalxCoord = finalxCoord - numOfMiles;
               reprompt = false;
               }
             else if (directions.equalsIgnoreCase("North")) {
                     finalyCoord = finalyCoord + numOfMiles;
                     reprompt = false;
                     }
                     else if (directions.equalsIgnoreCase("South")) {
                             finalyCoord = finalyCoord - numOfMiles;
                             reprompt = false;
                             }
             else {
                 reprompt = true;
                 JOptionPane.showMessageDialog(null, error);

        }
   }
   numOfMiles = Double.parseDouble(JOptionPane.showInputDialog(null, "Please enter distance in miles: "));
   if (numOfMiles > 0) {
   JOptionPane.showMessageDialog(null, "miles: " + totalMiles);
   }else {
   JOptionPane.showMessageDialog(null, error);


   }
}
}

或

---

添加

继续显示错误作业窗格后。这将迫使它跳回循环的起点并再次提示。
输入英里数如何。如果你输入了无效的东西，比如一个字母，它会关闭而不是循环。我可以再进去一会儿吗？我觉得循环会很奇怪，就像我说的，如果你真的需要在循环中使用它，你可以使用
continue语句。但是，我建议您使用两个循环。