类访问跨多个JAVA类的变量

Question

我是JAVA新手，正在编写一个在两个不同类之间传递变量的程序。我似乎不知道如何将变量的数据从一个类发送到另一个类，然后再发送回来？这可能吗

例如：

Public Class A {
    Scanner input = new Scanner(System.in);
    System.out.println("Please input the weight:");
            bagWeight=input.nextDouble();
    System.out.println("The total weight is: "+total);
}

Public Class B {
    double number = 3;
    public method(double number, double bagWeight) 
    {
        total = bagWeight*number;
        return total;
    }
}

Answer 1

当然这是可能的：有很多方法可以做到这一点

例如，您可以轻松做到这一点：

//Obviously pseudo Code...u need a constructor..or method
Public Class A{
            Scanner input = new Scanner(System.in);
            System.out.println("Please input the weight:");
            bagWeight=input.nextDouble();
            B b = new B();
            double total = b.method(1337, bagWheight);
            System.out.println("The total weight is: "+total);
    }