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我正在纠正一个程序来帮助我跟踪我的工作里程。我只去特定的地方。我做了一个开关，它具有我可能拥有的所有可能的开始和结束位置，以及它们的距离。现在当我运行我的程序时，会弹出一个窗口询问我是否去了每个位置。我每次都必须输入结束位置作为下一个开始位置。我希望能够输入一个长字符串（例如：location1>location2+location3>location4）并让它计算总里程。 



import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Scanner;

import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

public class Main extends JFrame {
    public static void main(String[] agrs) {
        double total = 0;
        double d = 0;
        int c = 0;
        int t = 0;
        //Scanner input = new Scanner(System.in);
        // Scanner input1 = new Scanner(System.in);
        // String place;
        JOptionPane.showMessageDialog(null, "MILEAGE CALCULATOR \n\nLocations: ADMIN, AE, BE, CE, CHS, CJHS, IE, NSE, PKE, RHS, SMS, SPE \nFormat: Location1>Location2");
    //  JOptionPane.showMessagedialog(null,"Locations: ADMIN, AE, BE, CE, CHS, CJHS, IE, NSE, PKE, RHS, SMS, SPE");

        //System.out.println("MILAGE CALCULATOR \nLocations: ADMIN, AE, BE, CE, CHS, CJHS, IE, NSE, PKE, RHS, SMS, SPE \nFormat: LOCATION1>LOCATION2");
        t = Integer.parseInt(JOptionPane.showInputDialog(null, "How many places did you go to from the admin building?"));
        //t = input.nextInt();
        //t++;

        // System.out.println(t);
        // System.out.println(c);
        while (t > c) {
            String place = JOptionPane.showInputDialog(null, "where did you go?");
            //String place = input.nextLine();
        //  place.equalsIgnoreCase(place);
            d=0;
            switch (place.toUpperCase()) {
            case "ADMIN>AE":
            case "AE>ADMIN":
                d = 7;
                break;
            case "ADMIN>BE":
            case "BE>ADMIN":
                d = 2.8;
                break;
            case "ADMIN>CE":
            case "CE>ADMIN":
                d = 1.5;
                break;
            case "ADMIN>CHS":
            case "CHS>ADMIN":
                d = .6;
                break;
            case "ADMIN>CJHS":
            case "CJHS>ADMIN":
                d = 1.5;
                break;
            case "ADMIN>IE":
            case "IE>ADMIN":
                d = 2.3;
                break;
            case "ADMIN>NSE":
            case "NSE>ADMIN":
                d = 4.5;
                break;
            case "ADMIN>PKE":
            case "PKE>ADMIN":
                d = 2.6;
                break;
            case "ADMIN>RHS":
            case "RHS>ADMIN":
                d = 1.5;
                break;
            case "ADMIN>SMS":
            case "SMS>ADMIN":
                d = 3.9;
                break;
            case "ADMIN>SPE":
            case "SPE>ADMIN":
                d = 3.2;
                break;
            case "AE>BE":
            case "BE>AE":
                d = 9.5;
                break;
            case "AE>CE":
            case "CE>AE":
                d = 6.3;
                break;
            case "AE>CHS":
            case "CHS>AE":
                d = 7.6;
                break;
            case "AE>CJHS":
            case "CJHS>AE":
                d = 6.3;
                break;
            case "AE>IE":
            case "IE>AE":
                d = 6.3;
                break;
            case "AE>NSE":
            case "NSE>AE":
                d = 8;
                break;
            case "AE>PKE":
            case "PKE>AE":
                d = 7.6;
                break;
            case "AE>RHS":
            case "RHS>AE":
                d = 6.3;
                break;
            case "AE>SMS":
            case "SMS>AE":
                d = 8.2;
                break;
            case "AE>SPE":
            case "SPE>AE":
                d = 7.5;
                break;
            case "BE>CE":
            case "CE>BE":
                d = 3.7;
                break;
            case "BE>CHS":
            case "CHS>BE":
                d = 2.7;
                break;
            case "BE>CJHS":
            case "CJHS>BE":
                d = 3.7;
                break;
            case"BE>IE":
            case "IE>BE":
                d = 5;
                break;
            case "BE>NSE":
            case "NSE>BE":
                d = 4.2;
                break;
            case "BE>PKE":
            case "PKE>BE":
                d = 2.8;
                break;
            case "BE>RHS":
            case "RHS>BE":
                d = 3.7;
                break;
            case "BE>SMS":
            case "SMS>BE":
                d = 4.2;
                break;
            case "BE>SPE":
            case "SPE>BE":
                d = 7.4;
                break;
            case "CE>CHS":
            case "CHS>CE":
                d = 1.9;
                break;
            case "CE>CJHS":
            case "CJHS>CE":
                d = 0;
                break;
            case "CE>IE":
            case "IE>CE":
                d = 2.5;
                break;
            case "CE>NSE":
            case "NSE>CE":
                d = 3.5;
                break;
            case "CE>PKE":
            case "PKE>CE":
                d = 2.3;
                break;
            case "CE>RHS":
            case "RHS>CE":
                d = 0;
                break;
            case "CE>SMS":
            case "SMS>CE":
                d = 3.7;
                break;
            case "CE>SPE":
            case "SPE>CE":
                d = 3.3;
                break;
            case "CHS>CJHS":
            case "CJHS>CHS":
                d = 1.8;
                break;
            case "CHS>IE":
            case "IE>CHS":
                d = 2.9;
                break;
            case "CHS>NSE":
            case "NSE>CHS":
                d = 3.2;
                break;
            case "CHS>PKE":
            case "PKE>CHS":
                d = 2;
                break;
            case "CHS>RHS":
            case "RHS>CHS":
                d = 1.9;
                break;
            case "CHS>SMS":
            case "SMS>CHS":
                d = 3.3;
                break;
            case "CHS>SPE":
            case "SPE>CHS":
                d = 3.8;
                break;
            case "CJHS>IE":
            case "IE>CJHS":
                d = 2.5;
                break;
            case "CJHS>NSE":
            case "NSE>CJHS":
                d = 4.3;
                break;
            case "CJHS>PKE":
            case "PKE>CJHS":
                d = 2.3;
                break;
            case "CJHS>RHS":
            case "RHS>CJHS":
                d = 0;
                break;
            case "CJHS>SMS":
            case "SMS>CJHS":
                d = 3.7;
                break;
            case "CJHS>SPE":
            case "SPE>CJHS":
                d = 3.3;
                break;
            case "IE>NSE":
            case "NSE>IE":
                d = 5.8;
                break;
            case "IE>PKE":
            case "PKE>IE":
                d = 4.6;
                break;
            case "IE>RHS":
            case "RHS>IE":
                d = 2.5;
                break;
            case "IE>SMS":
            case "SMS>IE":
                d = 6;
                break;
            case "IE>SPE":
            case "SPE>IE":
                d = 3.1;
                break;
            case "NSE>PKE":
            case "PKE>NSE":
                d = 1.3;
                break;
            case "NSE>RHS":
            case "RHS>NSE":
                d = 3.5;
                break;
            case "NSE>SMS":
            case "SMS>NSE":
                d = .2;
            break;
            case "NSE>SPE":
            case "SPE>NSE":
                d = 7.2;
                break;
            case "PKE>RHS":
            case "RHS>PKE":
                d = 2.2;
                break;
            case "PKE>SMS":
            case "SMS>PKE":
                d = 1.5;
                break;
            case "PKE>SPE":
            case "SPE>PKE":
                d = 5.5;
                break;
            case "RHS>SMS":
            case "SMS>RHS":
                d = 3.7;
                break;
            case "RHS>SPE":
            case "SPE>RHS":
                d = 3.3;
                break;
            case "SMS>SPE":
            case "SPE>SMS":
                d = 7.4;
                break;
            }

            // System.out.println(total);
            total = d + total;
            // System.out.println(total);
            // JOptionPane.showMessageDialog("miles Driven ", d+total);
            c++;
        }
        JOptionPane.showMessageDialog(null, "Miles Driven: " + total);
        //System.out.println(total);

    }
}
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1 回答 1

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您可以执行以下操作：

int total = 0;
String[] places = place.split(">"); //Split your input string place into a list 
for(int i = 0; i < places.length - 1; i++){
    String leg = places[i] + ">" + places[i+1]; //Create string representing this leg of the journey

    //Figure out the length of this leg of the journey using your switch statement

    total += d; //d is the variable you were using in the switch

}

因此，如果您输入“AE>Admin>BE>CJHS”，则循环的第一次迭代会将大小写设置为 AE>Admin，并使用您的开关将距离设置为 7，总距离为 7，第二次通过应该得到 Admin>BE，距离 = 2.8 和总计 = 9.8，第三次迭代 BE>CJHS，距离 = 3.7 和总计 = 13.5，如果我的心算正确的话。然后 i 将递增到 3，由于数组的长度只有 4，它会跳出循环。

如果您希望以不同的方式格式化您的字符串，这里是字符串类的 java 文档和它的 split 方法。http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/String.html#split(java.lang.String )

于 2012-08-14T13:46:29.600 回答