java - 无法创建新对象

Question

我用 java 创建了这两个文件，但它们无法编译。出现此错误:

cannot find symbol C02FootprintV1".

为什么程序无法识别该对象？我对此很陌生。

如何解决这个问题？

public class CO2FootprintV1 {

    private double myGallonsUsed;
    private double myTonsCO2;
    private double myPoundsCO2;

    CO2FootprintV1(double gals) {
        myGallonsUsed = gals;
    }

    public void calcTonsCO2() {
        myTonsCO2 = myGallonsUsed * 0.878;
    }

    public double getTonsCO2() {
        return myTonsCO2;
    }

    public void convertTonsToPoundsCO2() {
        myPoundsCO2 = myTonsCO2 * 220462262;
    }

    public double getPoundsCO2() {
        return myPoundsCO2;
    }
}

public class CO2FootprintV1Tester {

    public static void main(String[] args) {
        double gals;
        double tonsCO2, poundsCO2;

        gals = 1300;
        CO2FootprintV1 object = new C02FootprintV1(gals);

        object.calcTonsCO2();
        tonsCO2 = object.getTonsCO2();
        object.convertTonsToPoundsCO2();
        poundsCO2 = object.getPoundsCO2();
    }
}

Answer 1

上线

CO2FootprintV1 object = new C02FootprintV1(gals);

你的右手边有C02(见零二)，你的意思是

CO2FootprintV1 object = new CO2FootprintV1(gals);

或CO2(参见哦二)。另外，您应该考虑您的工具给您提供的错误消息可能是正确的。