java - 找不到符号java错误

Question

我对 java 和编程还比较陌生。我正在尝试为分配给我的作业编写一个程序。但是，我收到以下错误:

cannot find symbol
symbol: variable carMake
location: class CarTransferClient

以下代码行中的每个变量都会出现此错误:

System.out.println("Result = " + carTransfer(carMake, carModel, carEngine, carPetrolDiesel, location, destination, distance));

这是我尝试编写的部分的完整代码:

public class CarTransferClient {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        System.out.println("Result = " + carTransfer(carMake, carModel, carEngine, carPetrolDiesel, location, destination, distance));
    }

    private static String carTransfer(java.lang.String carMake, java.lang.String carModel, java.lang.String carEngine, java.lang.String carPetrolDiesel, java.lang.String location, java.lang.String destination, java.lang.String distance) {
        webservices.CarTransfer_Service service = new webservices.CarTransfer_Service();
        webservices.CarTransfer port = service.getCarTransferPort();
        return port.carTransfer(carMake, carModel, carEngine, carPetrolDiesel, location, destination, distance);
    }
}

我做错了什么以及如何解决？

我得到了以下工作代码作为示例(如果有帮助的话):

public class ConvertClient {

public static void main(String[] args) {
        System.out.println("Result = " + feetToMetres(1));
}

private static String feetToMetres(double feet) {
        webservices.Convert_Service service = new webservices.Convert_Service();
        webservices.Convert port = service.getConvertPort();
        return port.feetToMetres(feet);
}
}

Answer 1

您的 carMake、carModel 等在 System.out 中正在查找名为 carMake、carModel 的变量。您需要在调用之前声明它们。

public static void main(String[] args) {
    String carMake = "Make";
    String carModel = "Model";
    String carEngine= = "Engine";
    String carPetrolDiesel = "Diesel";
    String location = "Location";
    String destination = "Destination";
    String distance = "Distance";

    System.out.println("Result = " + carTransfer(carMake, carModel, carEngine, carPetrolDiesel, location, destination, distance));
}